$PPL
PPL Corp Stock $ppl

$ppl Overview Financials Valuation SEC Filings Company Website

2012 Form 10-K Financial Statement

#000092222413000025 Filed on February 28, 2013

Income Statement

Concept	2012	2011 Q4	2011 Q3
Revenue	$12.13B	$4.218B	$3.120B
YoY Change	-4.75%	126.41%	43.18%
Cost Of Revenue	$2.074B	$1.853B	$673.0M
YoY Change	-60.34%	5690.63%	-14.38%
Gross Profit	$10.06B	$2.365B	$2.447B
YoY Change	33.98%	29.16%	75.66%
Gross Profit Margin	82.9%	56.07%	78.43%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.286B	$338.0M	$305.0M
YoY Change	5.84%	85.71%	41.2%
% of Gross Profit	12.79%	14.29%	12.46%
Operating Expenses	$6.067B	$1.431B	$1.680B
YoY Change	2.83%	20.35%	92.88%
Operating Profit	$3.026B	$934.0M	$767.0M
YoY Change	-2.42%	45.48%	46.93%
Interest Expense	$951.0M	-$222.0M	$240.0M
YoY Change	5.9%	58.57%	40.35%
% of Operating Profit	31.43%	-23.77%	31.29%
Other Income/Expense, Net	-$39.00M	$30.00M	$37.00M
YoY Change	-1075.0%	-146.88%	-242.31%
Pretax Income	$1.000B	$720.0M	$559.0M
YoY Change	-41.69%	60.36%	72.0%
Income Tax	$518.0M	$262.0M	$110.0M
% Of Pretax Income	51.8%	36.39%	19.68%
Net Earnings	$1.526B	$454.0M	$444.0M
YoY Change	2.07%	27.89%	79.03%
Net Earnings / Revenue	12.58%	10.76%	14.23%
Basic Earnings Per Share	$2.61	$0.78	$0.76
Diluted Earnings Per Share	$2.60	$0.78	$0.76
COMMON SHARES
Basic Shares Outstanding	580.3M shares	578.3M shares	577.6M shares
Diluted Shares Outstanding	581.6M shares		578.1M shares

Balance Sheet

Concept	2012	2011 Q4	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$901.0M	$1.218B	$1.527B
YoY Change	-26.03%	11.95%	-68.53%
Cash & Equivalents	$901.0M	$1.202B	$1.511B
Short-Term Investments		$16.00M	$16.00M
Other Short-Term Assets	$2.670B	$28.00M	$51.00M
YoY Change	-28.44%	-67.44%	-98.52%
Inventory	$673.0M	$654.0M	$633.0M
Prepaid Expenses		$160.0M	$166.0M
Receivables	$745.0M	$732.0M	$753.0M
Other Receivables	$79.00M	$91.00M	$122.0M
Total Short-Term Assets	$5.068B	$6.426B	$5.412B
YoY Change	-21.13%	3.85%	-41.12%
LONG-TERM ASSETS
Property, Plant & Equipment	$30.03B	$27.27B	$26.92B
YoY Change	10.14%	30.94%	108.52%
Goodwill		$4.114B	$4.196B
YoY Change		133.62%
Intangibles		$1.065B	$1.074B
YoY Change		10.25%	78.7%
Long-Term Investments	$47.00M	$78.00M	$77.00M
YoY Change	-39.74%	4.0%	71.11%
Other Assets	$3.404B	$790.0M	$678.0M
YoY Change	-7.98%	38.35%	-78.96%
Total Long-Term Assets	$38.57B	$8.238B	$7.951B
YoY Change	6.47%	60.49%	-54.66%
TOTAL ASSETS
Total Short-Term Assets	$5.068B	$6.426B	$5.412B
Total Long-Term Assets	$38.57B	$8.238B	$7.951B
Total Assets	$43.63B	$42.65B	$40.96B
YoY Change	2.31%	29.88%	53.23%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.252B	$1.150B	$1.120B
YoY Change	8.87%	11.87%	52.8%
Accrued Expenses	$325.0M	$287.0M	$294.0M
YoY Change	13.24%	72.89%	75.0%
Deferred Revenue
YoY Change
Short-Term Debt	$652.0M	$578.0M	$428.0M
YoY Change	12.8%	-16.71%	136.46%
Long-Term Debt Due	$751.0M		$502.0M
YoY Change
Total Short-Term Liabilities	$5.625B	$5.255B	$4.540B
YoY Change	7.04%	0.79%	4.49%
LONG-TERM LIABILITIES
Long-Term Debt	$18.73B	$17.99B	$17.68B
YoY Change	4.07%	47.96%	99.97%
Other Long-Term Liabilities	$5.399B	$1.046B	$867.0M
YoY Change	8.46%	39.1%	-65.1%
Total Long-Term Liabilities	$24.12B	$8.304B	$7.625B
YoY Change	5.02%	18.9%	-32.66%
TOTAL LIABILITIES
Total Short-Term Liabilities	$5.625B	$5.255B	$4.540B
Total Long-Term Liabilities	$24.12B	$8.304B	$7.625B
Total Liabilities	$33.15B	$13.56B	$12.17B
YoY Change	4.19%	11.16%	-33.9%
SHAREHOLDERS EQUITY
Retained Earnings		$4.797B	$4.547B
YoY Change		17.52%
Common Stock		$6.819B	$6.801B
YoY Change		48.01%	135920.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$10.48B	$10.83B	$10.85B
YoY Change
Total Liabilities & Shareholders Equity	$43.63B	$42.65B	$40.96B
YoY Change	2.31%	29.88%	53.23%

Cashflow Statement

Concept	2012	2011 Q4	2011 Q3
OPERATING ACTIVITIES
Net Income	$1.526B	$454.0M	$444.0M
YoY Change	2.07%	27.89%	79.03%
Depreciation, Depletion And Amortization	$1.286B	$338.0M	$305.0M
YoY Change	5.84%	85.71%	41.2%
Cash From Operating Activities	$2.764B	$661.0M	$1.032B
YoY Change	10.25%	96.14%	-8.19%
INVESTING ACTIVITIES
Capital Expenditures	$3.105B	-$802.0M	-$682.0M
YoY Change	24.85%	24.34%	80.42%
Acquisitions
YoY Change
Other Investing Activities	-$52.00M	-$111.0M	-$58.00M
YoY Change	333.33%	-98.35%	1350.0%
Cash From Investing Activities	-$3.123B	-$913.0M	-$740.0M
YoY Change	-60.73%	-87.64%	93.72%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$72.00M
YoY Change	-103.13%
Debt Paid & Issued, Net	$108.0M
YoY Change	-91.07%
Cash From Financing Activities	$48.00M	-37.00M	-43.00M
YoY Change	-99.17%	-101.19%	-89.49%
NET CHANGE
Cash From Operating Activities	$2.764B	661.0M	1.032B
Cash From Investing Activities	-$3.123B	-913.0M	-740.0M
Cash From Financing Activities	$48.00M	-37.00M	-43.00M
Net Change In Cash	-$311.0M	-289.0M	249.0M
YoY Change	-196.58%	-92.65%	-25.23%
FREE CASH FLOW
Cash From Operating Activities	$2.764B	$661.0M	$1.032B
Capital Expenditures	$3.105B	-$802.0M	-$682.0M
Free Cash Flow	-$341.0M	$1.463B	$1.714B
YoY Change	-1805.0%	48.98%	14.11%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012Q2	dei	Entity Public Float EntityPublicFloat	16135714881	USD
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CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2010	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	415000000	USD
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4000000	USD
CY2012	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	366000000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	42648000000	USD
CY2012	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	844000000	USD
CY2012	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	12286000000	USD
CY2012	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	9177000000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-39000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1186000000	USD
CY2011	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	484000000	USD
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	581626000	shares
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1510000000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	545000000	USD
CY2011	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-190000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	50000000	USD
CY2010	ppl	Equity Investees Other Comprehensive Income Loss Reclassified To Net Income EquityInvesteesOtherComprehensiveIncomeLossReclassifiedToNetIncome		USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-31000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-32000000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	154000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1152000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	9000000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	35000000	USD
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	ppl	Wholesale Energy Marketing Realized WholesaleEnergyMarketingRealized	4433000000	USD
CY2011	ppl	Wholesale Energy Marketing Realized WholesaleEnergyMarketingRealized	3807000000	USD
CY2010	ppl	Wholesale Energy Marketing Realized WholesaleEnergyMarketingRealized	4832000000	USD
CY2012	ppl	Wholesale Energy Marketing Unrealized Economic Activity WholesaleEnergyMarketingUnrealizedEconomicActivity	-311000000	USD
CY2011	ppl	Wholesale Energy Marketing Unrealized Economic Activity WholesaleEnergyMarketingUnrealizedEconomicActivity	1407000000	USD
CY2010	ppl	Wholesale Energy Marketing Unrealized Economic Activity WholesaleEnergyMarketingUnrealizedEconomicActivity	-805000000	USD
CY2012	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	4000000	USD
CY2011	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	-2000000	USD
CY2010	us-gaap	Gain Loss On Derivative Instruments Held For Trading Purposes Net GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet	2000000	USD
CY2012	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	508000000	USD
CY2011	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	507000000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	1526000000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	1495000000	USD
CY2010	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	409000000	USD
CY2012	us-gaap	Fuel Costs FuelCosts	1837000000	USD
CY2011	us-gaap	Fuel Costs FuelCosts	1946000000	USD
CY2010	us-gaap	Fuel Costs FuelCosts	1235000000	USD
CY2011	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	12737000000	USD
CY2010	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	8521000000	USD
CY2012	ppl	Purchased Power And Gas PurchasedPowerAndGas	2997000000	USD
CY2011	ppl	Purchased Power And Gas PurchasedPowerAndGas	2130000000	USD
CY2010	ppl	Purchased Power And Gas PurchasedPowerAndGas	2773000000	USD
CY2012	ppl	Energy Purchases Unrealized Economic Activity EnergyPurchasesUnrealizedEconomicActivity	-442000000	USD
CY2011	ppl	Energy Purchases Unrealized Economic Activity EnergyPurchasesUnrealizedEconomicActivity	1123000000	USD
CY2010	ppl	Energy Purchases Unrealized Economic Activity EnergyPurchasesUnrealizedEconomicActivity	-286000000	USD
CY2012	us-gaap	Other Cost Of Services OtherCostOfServices	2835000000	USD
CY2011	us-gaap	Other Cost Of Services OtherCostOfServices	2667000000	USD
CY2010	us-gaap	Other Cost Of Services OtherCostOfServices	1756000000	USD
CY2012	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1100000000	USD
CY2011	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	960000000	USD
CY2010	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	556000000	USD
CY2011	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	326000000	USD
CY2010	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	238000000	USD
CY2010	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	6655000000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	3109000000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	3101000000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	1866000000	USD
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-31000000	USD
CY2012	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	27000000	USD
CY2011	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	6000000	USD
CY2010	us-gaap	Marketable Securities Realized Gain Loss Other Than Temporary Impairments Amount MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount	3000000	USD
CY2012	us-gaap	Interest Expense InterestExpense	961000000	USD
CY2011	us-gaap	Interest Expense InterestExpense	898000000	USD
CY2010	us-gaap	Interest Expense InterestExpense	593000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2082000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2201000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1239000000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	263000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	1537000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	976000000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-6000000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2000000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-17000000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	1531000000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	1512000000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	959000000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5000000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	17000000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	21000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	955000000	USD
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CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-6000000	USD
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CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plan Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax		USD
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CY2012	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	79000000	USD
CY2012	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plan Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax		USD
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CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1203000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-7000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-309000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-10000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	17000000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	938000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1532000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1493000000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	2000000	USD
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CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.62
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.70
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.21
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.61
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.70
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.20
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.61
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.71
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.17
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.60
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CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.17
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.44
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2010	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.40
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	580276000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	550395000	shares
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CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	550952000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	431569000	shares
CY2012	us-gaap	Utility Revenue UtilityRevenue	6808000000	USD
CY2011	us-gaap	Utility Revenue UtilityRevenue	6292000000	USD
CY2010	us-gaap	Utility Revenue UtilityRevenue	3668000000	USD
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CY2012	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodNetOfTax		USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-7000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-434000000	USD
CY2012	ppl	Equity Investees Other Comprehensive Income Loss Reclassified To Net Income EquityInvesteesOtherComprehensiveIncomeLossReclassifiedToNetIncome		USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-10000000	USD
CY2010	us-gaap	Ineffectiveness On Foreign Currency Fair Value Hedges Is Immaterial IneffectivenessOnForeignCurrencyFairValueHedgesIsImmaterial	no gains or losses
CY2011	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-48000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	202000000	USD
CY2011	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodNetOfTax		USD
CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	47000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-80000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-126000000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	41000000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plan Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostNetOfTax	2000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	996000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-5000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	58000000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	-17000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1017000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-12000000	USD
CY2012	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	2000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	1000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	278000000	USD
CY2012	ppl	Other Comprehensive Income Reclassification Adjustment On Equity Investees Other Comprehensive Income Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentOnEquityInvesteesOtherComprehensiveIncomeIncludedInNetIncomeTax	0	USD
CY2010	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodNetOfTax	-8000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	29000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	219000000	USD
CY2010	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-59000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	0	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	343000000	USD
CY2012	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	5000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	-29000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	5000000	USD
CY2011	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-2000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	5000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	-19000000	USD
CY2011	ppl	Other Comprehensive Income Reclassification Adjustment On Equity Investees Other Comprehensive Income Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentOnEquityInvesteesOtherComprehensiveIncomeIncludedInNetIncomeTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-139000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-6000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	1000000	USD
CY2011	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	246000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	58000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-148000000	USD
CY2010	ppl	Other Comprehensive Income Defined Benefit Plans Net Transition Obligation Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetTransitionObligationArisingDuringPeriodTax	-4000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	14000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	84000000	USD
CY2010	ppl	Other Comprehensive Income Reclassification Adjustment On Equity Investees Other Comprehensive Income Included In Net Income Tax OtherComprehensiveIncomeReclassificationAdjustmentOnEquityInvesteesOtherComprehensiveIncomeIncludedInNetIncomeTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Transition Asset Obligation Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax	-1000000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-31000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	-14000000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	3000000	USD
CY2010	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	7000000	USD
CY2010	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-1000000	USD
CY2012	ppl	Equity Investees Other Comprehensive Income Loss EquityInvesteesOtherComprehensiveIncomeLoss	2000000	USD
CY2011	ppl	Equity Investees Other Comprehensive Income Loss EquityInvesteesOtherComprehensiveIncomeLoss		USD
CY2010	ppl	Equity Investees Other Comprehensive Income Loss EquityInvesteesOtherComprehensiveIncomeLoss		USD
CY2010	ppl	Other Comprehensive Income Equity Investees Other Comprehensive Income Loss Arising During Period Tax OtherComprehensiveIncomeEquityInvesteesOtherComprehensiveIncomeLossArisingDuringPeriodTax	0	USD
CY2011	ppl	Other Comprehensive Income Equity Investees Other Comprehensive Income Loss Arising During Period Tax OtherComprehensiveIncomeEquityInvesteesOtherComprehensiveIncomeLossArisingDuringPeriodTax	0	USD
CY2012	ppl	Other Comprehensive Income Equity Investees Other Comprehensive Income Loss Arising During Period Tax OtherComprehensiveIncomeEquityInvesteesOtherComprehensiveIncomeLossArisingDuringPeriodTax	-1000000	USD
CY2012	ppl	Depreciation From Continuing And Discontinued Operations DepreciationFromContinuingAndDiscontinuedOperations	1100000000	USD
CY2011	ppl	Depreciation From Continuing And Discontinued Operations DepreciationFromContinuingAndDiscontinuedOperations	961000000	USD
CY2010	ppl	Depreciation From Continuing And Discontinued Operations DepreciationFromContinuingAndDiscontinuedOperations	567000000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	166000000	USD
CY2011	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	205000000	USD
CY2010	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	102000000	USD
CY2012	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	424000000	USD
CY2011	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	582000000	USD
CY2010	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	241000000	USD
CY2012	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	28000000	USD
CY2011	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	13000000	USD
CY2010	us-gaap	Utilities Operating Expense Impairments UtilitiesOperatingExpenseImpairments	120000000	USD
CY2012	ppl	Unrealized Gains Losses On Derivatives And Other Hedging Activities UnrealizedGainsLossesOnDerivativesAndOtherHedgingActivities	-27000000	USD
CY2011	ppl	Unrealized Gains Losses On Derivatives And Other Hedging Activities UnrealizedGainsLossesOnDerivativesAndOtherHedgingActivities	314000000	USD
CY2010	ppl	Unrealized Gains Losses On Derivatives And Other Hedging Activities UnrealizedGainsLossesOnDerivativesAndOtherHedgingActivities	-542000000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3105000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2033000000	USD
CY2012	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod		USD
CY2011	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	-74000000	USD
CY2010	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	66000000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-29000000	USD
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-52000000	USD
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-36000000	USD
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-32000000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	271000000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-36000000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	216000000	USD
CY2012	ppl	Net Change Unbilled Revenues NetChangeUnbilledRevenues	19000000	USD
CY2011	ppl	Net Change Unbilled Revenues NetChangeUnbilledRevenues	-64000000	USD
CY2010	ppl	Net Change Unbilled Revenues NetChangeUnbilledRevenues	99000000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	5000000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-294000000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	318000000	USD
CY2012	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-34000000	USD
CY2010	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	-18000000	USD
CY2012	ppl	Change In Taxes ChangeInTaxes	24000000	USD
CY2011	ppl	Change In Taxes ChangeInTaxes	-104000000	USD
CY2010	ppl	Change In Taxes ChangeInTaxes	20000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-6000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-9000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	33000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	62000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	45000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-92000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-99000000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-12000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2764000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2507000000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2487000000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1597000000	USD
CY2012	ppl	Proceeds From Sale Of Long Island Generation Business ProceedsFromSaleOfLongIslandGenerationBusiness		USD
CY2011	ppl	Proceeds From Sale Of Long Island Generation Business ProceedsFromSaleOfLongIslandGenerationBusiness		USD
CY2010	ppl	Proceeds From Sale Of Long Island Generation Business ProceedsFromSaleOfLongIslandGenerationBusiness	124000000	USD
CY2012	ppl	Proceeds From Sale Of Maine Hydroelectric Generation Business ProceedsFromSaleOfMaineHydroelectricGenerationBusiness		USD
CY2011	ppl	Proceeds From Sale Of Maine Hydroelectric Generation Business ProceedsFromSaleOfMaineHydroelectricGenerationBusiness		USD
CY2010	ppl	Proceeds From Sale Of Maine Hydroelectric Generation Business ProceedsFromSaleOfMaineHydroelectricGenerationBusiness	38000000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	169000000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	128000000	USD
CY2012	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	20000000	USD
CY2011	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	163000000	USD
CY2010	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments		USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-96000000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	143000000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	90000000	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	53000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3123000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7952000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8229000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1223000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	5745000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4642000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	108000000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1210000000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	20000000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	833000000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	746000000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	566000000	USD
CY2012	ppl	Payment Of Debt Issuance Costs Short And Long Term Facilities PaymentOfDebtIssuanceCostsShortAndLongTermFacilities	17000000	USD
CY2011	ppl	Payment Of Debt Issuance Costs Short And Long Term Facilities PaymentOfDebtIssuanceCostsShortAndLongTermFacilities	102000000	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	313000000	USD
CY2010	us-gaap	Pension Contributions PensionContributions	396000000	USD
CY2011	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock		USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-76000000	USD
CY2010	ppl	Payment Of Debt Issuance Costs Short And Long Term Facilities PaymentOfDebtIssuanceCostsShortAndLongTermFacilities	175000000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	74000000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-125000000	USD
CY2010	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	70000000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-19000000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-20000000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	48000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	5767000000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	6307000000	USD
CY2012	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	10000000	USD
CY2011	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-45000000	USD
CY2010	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	13000000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-301000000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	277000000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	124000000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	801000000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	847000000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	696000000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	458000000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	73000000	USD
CY2012	us-gaap	Pension Contributions PensionContributions	607000000	USD
CY2011	us-gaap	Pension Contributions PensionContributions	667000000	USD
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	139000000	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	156000000	USD
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	114000000	USD
CY2012	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	2000000	USD
CY2011	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-106000000	USD
CY2010	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	110000000	USD
CY2012	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	32000000	USD
CY2011	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	109000000	USD
CY2010	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	50000000	USD
CY2012	ppl	Proceeds From Sale Of Certain Noncore Generation Facilities ProceedsFromSaleOfCertainNoncoreGenerationFacilities		USD
CY2011	ppl	Proceeds From Sale Of Certain Noncore Generation Facilities ProceedsFromSaleOfCertainNoncoreGenerationFacilities	381000000	USD
CY2010	ppl	Proceeds From Sale Of Certain Noncore Generation Facilities ProceedsFromSaleOfCertainNoncoreGenerationFacilities		USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	72000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2297000000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2441000000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	925000000	USD
CY2012	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired		USD
CY2011	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	5763000000	USD
CY2010	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired		USD
CY2012	us-gaap	Adjustment For Amortization AdjustmentForAmortization	186000000	USD
CY2011	us-gaap	Adjustment For Amortization AdjustmentForAmortization	254000000	USD
CY2010	us-gaap	Adjustment For Amortization AdjustmentForAmortization	213000000	USD
CY2010	us-gaap	Payments To Acquire Business Three Net Of Cash Acquired PaymentsToAcquireBusinessThreeNetOfCashAcquired		USD
CY2011	us-gaap	Payments To Acquire Business Three Net Of Cash Acquired PaymentsToAcquireBusinessThreeNetOfCashAcquired		USD
CY2012	us-gaap	Payments To Acquire Business Three Net Of Cash Acquired PaymentsToAcquireBusinessThreeNetOfCashAcquired	84000000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired		USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired		USD
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	6812000000	USD
CY2012	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	250000000	USD
CY2010	us-gaap	Payments For Repurchase Of Redeemable Preferred Stock PaymentsForRepurchaseOfRedeemablePreferredStock	54000000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-7000000	USD
CY2011Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	2548000000	USD
CY2012	us-gaap	Litigation Settlement Gross LitigationSettlementGross	6000000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment		USD
CY2012	ppl	Payments For Contractual Adjustments PaymentsForContractualAdjustments	94000000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	89000000	USD
CY2010	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	106000000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment		USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment		USD
CY2011	ppl	Payments For Contractual Adjustments PaymentsForContractualAdjustments	72000000	USD
CY2010	ppl	Payments For Contractual Adjustments PaymentsForContractualAdjustments	13000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	901000000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1202000000	USD
CY2012Q4	us-gaap	Short Term Investments ShortTermInvestments		USD
CY2011Q4	us-gaap	Short Term Investments ShortTermInvestments	16000000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	54000000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	152000000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	745000000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	732000000	USD
CY2012Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	79000000	USD
CY2011Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	91000000	USD
CY2012Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	857000000	USD
CY2011Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	834000000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	673000000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	654000000	USD
CY2012Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	166000000	USD
CY2011Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	160000000	USD
CY2012Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	1525000000	USD
CY2012Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	19000000	USD
CY2011Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	9000000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	49000000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	28000000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	5068000000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	6426000000	USD
CY2012Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	712000000	USD
CY2011Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	640000000	USD
CY2012Q4	us-gaap	Other Investments OtherInvestments	47000000	USD
CY2011Q4	us-gaap	Other Investments OtherInvestments	78000000	USD
CY2012Q4	us-gaap	Long Term Investments LongTermInvestments	759000000	USD
CY2011Q4	us-gaap	Long Term Investments LongTermInvestments	718000000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	25196000000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	22994000000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	4164000000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	3534000000	USD
CY2012Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	21032000000	USD
CY2011Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	19460000000	USD
CY2012Q4	ppl	Property Plant And Equipment Generation Or Processing PropertyPlantAndEquipmentGenerationOrProcessing	11295000000	USD
CY2011Q4	ppl	Property Plant And Equipment Generation Or Processing PropertyPlantAndEquipmentGenerationOrProcessing	10514000000	USD
CY2012Q4	ppl	Property Plant And Equipment Nuclear Fuel PropertyPlantAndEquipmentNuclearFuel	524000000	USD
CY2011Q4	ppl	Property Plant And Equipment Nuclear Fuel PropertyPlantAndEquipmentNuclearFuel	457000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	726000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	637000000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5942000000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5676000000	USD
CY2012Q4	ppl	Property Plant And Equipment Net Nonregulated PropertyPlantAndEquipmentNetNonregulated	6603000000	USD
CY2011Q4	ppl	Property Plant And Equipment Net Nonregulated PropertyPlantAndEquipmentNetNonregulated	5932000000	USD
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	2397000000	USD
CY2011Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	1874000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	30032000000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	27266000000	USD
CY2012Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1483000000	USD
CY2011Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1349000000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	4158000000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	4114000000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	925000000	USD
CY2011Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1065000000	USD
CY2011Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	920000000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	637000000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	790000000	USD
CY2012Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	7775000000	USD
CY2011Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	8238000000	USD
CY2012Q4	us-gaap	Assets Assets	43634000000	USD
CY2011Q4	us-gaap	Assets Assets	42648000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	64000000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	54000000	USD
CY2012Q4	ppl	Ppe Net From Consolidation Of Vie PpeNetFromConsolidationOfVie	428000000	USD
CY2011Q4	ppl	Ppe Net From Consolidation Of Vie PpeNetFromConsolidationOfVie	416000000	USD
CY2012Q4	ppl	Variable Interest Carrying Amount Intangible Assets VariableInterestCarryingAmountIntangibleAssets	10000000	USD
CY2011Q4	ppl	Variable Interest Carrying Amount Intangible Assets VariableInterestCarryingAmountIntangibleAssets	11000000	USD
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	780000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	780000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	581944000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	578405000	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	581944000	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	578405000	shares
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	652000000	USD
CY2011Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	578000000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	751000000	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent		USD
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1252000000	USD
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1150000000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	90000000	USD
CY2011Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	65000000	USD
CY2011Q4	us-gaap	Interest Payable Current InterestPayableCurrent	287000000	USD
CY2011Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	207000000	USD
CY2012Q4	ppl	Price Risk Management Liabilities Current PriceRiskManagementLiabilitiesCurrent	1065000000	USD
CY2011Q4	ppl	Price Risk Management Liabilities Current PriceRiskManagementLiabilitiesCurrent	1570000000	USD
CY2012Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	61000000	USD
CY2011Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	73000000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1219000000	USD
CY2011Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1325000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5625000000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	5255000000	USD
CY2012Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	210000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	18725000000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	17993000000	USD
CY2012	ppl	Target Year Greenhouse Gas Reduction Pennsylvania Advisory Climate Change Action Report TargetYearGreenhouseGasReductionPennsylvaniaAdvisoryClimateChangeActionReport	2020-12-31
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3387000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3326000000	USD
CY2012Q4	ppl	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	328000000	USD
CY2011Q4	ppl	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	285000000	USD
CY2012Q4	ppl	Price Risk Management Liabilities PriceRiskManagementLiabilities	629000000	USD
CY2011Q4	ppl	Price Risk Management Liabilities PriceRiskManagementLiabilities	840000000	USD
CY2012Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	2076000000	USD
CY2011Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	1313000000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	536000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	484000000	USD
CY2012Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1010000000	USD
CY2011Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1010000000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	820000000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1046000000	USD
CY2012Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	8786000000	USD
CY2011Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	8304000000	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	6000000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	6000000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	6936000000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	6813000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5478000000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4797000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1940000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-788000000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	10480000000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	10828000000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	18000000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	268000000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	11096000000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	43634000000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5815000000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2491000000	USD
CY2010	ppl	Dividends Dividend Equivalents Redemptions And Distributions DividendsDividendEquivalentsRedemptionsAndDistributions	677000000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2345000000	USD
CY2011	ppl	Dividends Dividend Equivalents Redemptions And Distributions DividendsDividendEquivalentsRedemptionsAndDistributions	797000000	USD
CY2012	ppl	Issuance Of Equity Units Future Contract Adjustment Payments Present Value And Related Issuance Costs IssuanceOfEquityUnitsFutureContractAdjustmentPaymentsPresentValueAndRelatedIssuanceCosts		USD
CY2012	ppl	Stock Based Compensation StockBasedCompensation	18000000	USD
CY2012	ppl	Dividends Dividend Equivalents Redemptions And Distributions DividendsDividendEquivalentsRedemptionsAndDistributions	1094000000	USD
CY2010	ppl	Stock Based Compensation StockBasedCompensation	8000000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8478000000	USD
CY2011	ppl	Stock Based Compensation StockBasedCompensation	10000000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	99000000	USD
CY2012	ppl	Votes Per Share Of Common Stock VotesPerShareOfCommonStock	1	pure
CY2011	ppl	Votes Per Share Of Common Stock VotesPerShareOfCommonStock	1	pure
CY2010	ppl	Votes Per Share Of Common Stock VotesPerShareOfCommonStock	1	pure
CY2011	ppl	Shares Issued Under Specific Equity Offering SharesIssuedUnderSpecificEquityOffering	92000000	shares
CY2010	ppl	Shares Issued Under Specific Equity Offering SharesIssuedUnderSpecificEquityOffering	103500000	shares
CY2011	ppl	Issuance Of Equity Units Future Contract Adjustment Payments Present Value IssuanceOfEquityUnitsFutureContractAdjustmentPaymentsPresentValue	123000000	USD
CY2010	ppl	Issuance Of Equity Units Future Contract Adjustment Payments Present Value IssuanceOfEquityUnitsFutureContractAdjustmentPaymentsPresentValue	157000000	USD
CY2011	ppl	Issuance Of Equity Units Related Issuance Costs Net Of Tax IssuanceOfEquityUnitsRelatedIssuanceCostsNetOfTax	20000000	USD
CY2010	ppl	Issuance Of Equity Units Related Issuance Costs Net Of Tax IssuanceOfEquityUnitsRelatedIssuanceCostsNetOfTax	19000000	USD
CY2011	ppl	Issuance Of Equity Units Future Contract Adjustment Payments Present Value And Related Issuance Costs IssuanceOfEquityUnitsFutureContractAdjustmentPaymentsPresentValueAndRelatedIssuanceCosts	-143000000	USD
CY2010	ppl	Issuance Of Equity Units Future Contract Adjustment Payments Present Value And Related Issuance Costs IssuanceOfEquityUnitsFutureContractAdjustmentPaymentsPresentValueAndRelatedIssuanceCosts	-176000000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	47000000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	33000000	USD
CY2012	ppl	Reclassification From Share Based Compensation To Common Stock Issued ReclassificationFromShareBasedCompensationToCommonStockIssued	-29000000	USD
CY2011	ppl	Reclassification From Share Based Compensation To Common Stock Issued ReclassificationFromShareBasedCompensationToCommonStockIssued	-23000000	USD
CY2010	ppl	Reclassification From Share Based Compensation To Common Stock Issued ReclassificationFromShareBasedCompensationToCommonStockIssued	-18000000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	26000000	USD
CY2011	ppl	Foreign Operations Reporting Results Period ForeignOperationsReportingResultsPeriod	8	Integer
CY2012Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	12000000	USD
CY2012Q4	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	70000000	USD
CY2011Q4	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	59000000	USD
CY2012	ppl	Minimum Percentage Of Pension Gains Losses To Use Accelerated Amortization MinimumPercentageOfPensionGainsLossesToUseAcceleratedAmortization	0.10	pure
CY2012	ppl	Maximum Percentage Of Pension Gains Losses To Use Accelerated Amortization MaximumPercentageOfPensionGainsLossesToUseAcceleratedAmortization	0.30	pure
CY2012	ppl	Excess Percentage Of Pension Gains Losses To Use Accelerated Amortization ExcessPercentageOfPensionGainsLossesToUseAcceleratedAmortization	0.30	pure
CY2011Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs CostsInExcessOfBillingsOnUncompletedContractsOrPrograms	15000000	USD
CY2012	ppl	Maturity Period At Time Of Purchase For Instruments To Be Considered Cash Equivalents MaturityPeriodAtTimeOfPurchaseForInstrumentsToBeConsideredCashEquivalents	3	Integer
CY2012	ppl	Foreign Operations Reporting Lag ForeignOperationsReportingLag	1	Integer
CY2012	ppl	Depreciation Reduction In Future Period DepreciationReductionInFuturePeriod	-19000000	USD
CY2012	ppl	Recurring Period Price Control Review RecurringPeriodPriceControlReview	5	Integer
CY2012	ppl	Uncertain Tax Positions Second Step Benefit Recognized That Exceeds Percentage UncertainTaxPositionsSecondStepBenefitRecognizedThatExceedsPercentage	0.50	pure
CY2012Q4	ppl	Defined Benefits Difference Between Actual Value And Expected Plan Value Percentage DefinedBenefitsDifferenceBetweenActualValueAndExpectedPlanValuePercentage	0.20	pure
CY2012	ppl	Defined Benefits Expected Average Remaining Service Of Plan Participants Percentage DefinedBenefitsExpectedAverageRemainingServiceOfPlanParticipantsPercentage	0.50	pure
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Use of Estimates</font><font style="font-family:Arial;font-size:10pt;font-weight:bold;"> </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p>
CY2012Q4	ppl	Accumulated Other Comprehensive Income Loss Defined Benefit Plans Net Of Tax Actuarial Gain Loss AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlansNetOfTaxActuarialGainLoss	-2023000000	USD
CY2009Q4	ppl	Accumulated Other Comprehensive Income Loss Equity Investee Net Of Tax AccumulatedOtherComprehensiveIncomeLossEquityInvesteeNetOfTax	-2000000	USD
CY2009Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	61000000	USD
CY2009Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	-9000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-195000000	USD
CY2009Q4	ppl	Accumulated Other Comprehensive Income Loss Defined Benefit Plans Net Of Tax Actuarial Gain Loss AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlansNetOfTaxActuarialGainLoss	-993000000	USD
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-537000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-243000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-149000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	110000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	132000000	USD
CY2012Q4	ppl	Accumulated Other Comprehensive Income Loss Equity Investee Net Of Tax AccumulatedOtherComprehensiveIncomeLossEquityInvesteeNetOfTax	3000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	14000000	USD
CY2012	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Changes in Classification</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">The classification of certain amounts in the 2011 and 2010 financial statements have been changed to conform to the current presentation. The changes in classification did not affect</font><font style="font-family:Times New Roman;font-size:10pt;"> the Registrants' net income or equity.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p>
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-136000000	USD
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	62000000	USD
CY2009Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	602000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	1000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	86000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	695000000	USD
CY2010Q4	ppl	Accumulated Other Comprehensive Income Loss Equity Investee Net Of Tax AccumulatedOtherComprehensiveIncomeLossEquityInvesteeNetOfTax	-2000000	USD
CY2010Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	32000000	USD
CY2010Q4	ppl	Accumulated Other Comprehensive Income Loss Defined Benefit Plans Net Of Tax Actuarial Gain Loss AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlansNetOfTaxActuarialGainLoss	-1032000000	USD
CY2010Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	1000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	88000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	527000000	USD
CY2011Q4	ppl	Accumulated Other Comprehensive Income Loss Equity Investee Net Of Tax AccumulatedOtherComprehensiveIncomeLossEquityInvesteeNetOfTax	1000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	25000000	USD
CY2011Q4	ppl	Accumulated Other Comprehensive Income Loss Defined Benefit Plans Net Of Tax Actuarial Gain Loss AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlansNetOfTaxActuarialGainLoss	-1137000000	USD
CY2011Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	1000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-479000000	USD
CY2012	us-gaap	Electrical Distribution Revenue ElectricalDistributionRevenue	4519000000	USD
CY2011	us-gaap	Electrical Distribution Revenue ElectricalDistributionRevenue	4674000000	USD
CY2010	us-gaap	Electrical Distribution Revenue ElectricalDistributionRevenue	2941000000	USD
CY2012	ppl	Electric Foreign Regulated Revenue ElectricForeignRegulatedRevenue	2289000000	USD
CY2011	ppl	Electric Foreign Regulated Revenue ElectricForeignRegulatedRevenue	1618000000	USD
CY2010	ppl	Electric Foreign Regulated Revenue ElectricForeignRegulatedRevenue	727000000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	135000000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	209000000	USD
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	53000000	USD
CY2011	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	51000000	USD
CY2010	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	30000000	USD
CY2012	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Guarantees</font><font style="font-family:Arial;font-size:10pt;font-weight:bold;"> </font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">(PPL, PPL Energy Supply</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">,</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;"> PPL Electric</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">, LKE, LG&E and KU</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">)</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Generally, the initial measurement of a guarantee liability is the fair value of the guarantee at its inception. However, there are certain guarantees excluded from the scope of accounting guidance and other guarantees that are not subject to the initial recognition and measurement provisions of accounting guidance</font><font style="font-family:Times New Roman;font-size:10pt;"> that only require d</font><font style="font-family:Times New Roman;font-size:10pt;">i</font><font style="font-family:Times New Roman;font-size:10pt;">sclosure</font><font style="font-family:Times New Roman;font-size:10pt;">. See Note </font><font style="font-family:Times New Roman;font-size:10pt;">15</font><font style="font-family:Times New Roman;font-size:10pt;"> for further discussion of recorded and unrecorded guarantees.</font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p>
CY2012	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	4	Integer
CY2010	us-gaap	Revenues Revenues	8521000000	USD
CY2011	us-gaap	Revenues Revenues	12737000000	USD
CY2012	us-gaap	Revenues Revenues	12286000000	USD
CY2012	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	3153000000	USD
CY2011	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	2556000000	USD
CY2010	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	1639000000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	5000000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	7000000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	8000000	USD
CY2012	ppl	Segment Reporting Information Deferred Income Taxes And Investment Tax Credits SegmentReportingInformationDeferredIncomeTaxesAndInvestmentTaxCredits	426000000	USD
CY2011	ppl	Segment Reporting Information Deferred Income Taxes And Investment Tax Credits SegmentReportingInformationDeferredIncomeTaxesAndInvestmentTaxCredits	584000000	USD
CY2010	ppl	Segment Reporting Information Deferred Income Taxes And Investment Tax Credits SegmentReportingInformationDeferredIncomeTaxesAndInvestmentTaxCredits	251000000	USD
CY2012Q4	us-gaap	Noncurrent Assets NoncurrentAssets	30727000000	USD
CY2011Q4	us-gaap	Noncurrent Assets NoncurrentAssets	28125000000	USD
CY2012	us-gaap	Employee Stock Ownership Plan Esop Shares Contributed To Esop EmployeeStockOwnershipPlanESOPSharesContributedToESOP	279945	shares
CY2012	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	2326917	shares
CY2012	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	936218	shares
CY2012	ppl	Income From Continuing Operations After Tax Allocated To Participating Securities IncomeFromContinuingOperationsAfterTaxAllocatedToParticipatingSecurities	8000000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2011	ppl	Incremental Common Shares Attributable To Equity Forward Sale Agreements IncrementalCommonSharesAttributableToEquityForwardSaleAgreements		shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	563000	shares
CY2011	ppl	Income From Continuing Operations After Tax Allocated To Participating Securities IncomeFromContinuingOperationsAfterTaxAllocatedToParticipatingSecurities	6000000	USD
CY2012	ppl	Purchase Contracts2010 PurchaseContracts2010	195000	shares
CY2011	ppl	Purchase Contracts2010 PurchaseContracts2010	157000	shares
CY2010	ppl	Purchase Contracts2010 PurchaseContracts2010		shares
CY2012	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	8000000	USD
CY2011	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	6000000	USD
CY2010	us-gaap	Undistributed Earnings Allocated To Participating Securities UndistributedEarningsAllocatedToParticipatingSecurities	4000000	USD
CY2012	ppl	Incremental Common Shares Attributable To Equity Forward Sale Agreements IncrementalCommonSharesAttributableToEquityForwardSaleAgreements	592000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	400000	shares
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.01
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.03
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.04
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	224000	shares
CY2010	ppl	Income From Continuing Operations After Tax Allocated To Participating Securities IncomeFromContinuingOperationsAfterTaxAllocatedToParticipatingSecurities	4000000	USD
CY2012	ppl	Income From Continuing Operations After Tax Available To Shareholders IncomeFromContinuingOperationsAfterTaxAvailableToShareholders	1518000000	USD
CY2011	ppl	Income From Continuing Operations After Tax Available To Shareholders IncomeFromContinuingOperationsAfterTaxAvailableToShareholders	1487000000	USD
CY2010	ppl	Income From Continuing Operations After Tax Available To Shareholders IncomeFromContinuingOperationsAfterTaxAvailableToShareholders	951000000	USD
CY2012	ppl	Net Income Available To Common Shareowners NetIncomeAvailableToCommonShareowners	1512000000	USD
CY2011	ppl	Net Income Available To Common Shareowners NetIncomeAvailableToCommonShareowners	1489000000	USD
CY2010	ppl	Net Income Available To Common Shareowners NetIncomeAvailableToCommonShareowners	934000000	USD
CY2010	ppl	Incremental Common Shares Attributable To Equity Forward Sale Agreements IncrementalCommonSharesAttributableToEquityForwardSaleAgreements		shares
CY2012	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments	6000000	USD
CY2012	ppl	Income From Continuing Operations After Tax Issuance Costs Preferred Securities IncomeFromContinuingOperationsAfterTaxIssuanceCostsPreferredSecurities	6000000	USD
CY2011	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments		USD
CY2011	ppl	Income From Continuing Operations After Tax Issuance Costs Preferred Securities IncomeFromContinuingOperationsAfterTaxIssuanceCostsPreferredSecurities		USD
CY2010	ppl	Income From Continuing Operations After Tax Issuance Costs Preferred Securities IncomeFromContinuingOperationsAfterTaxIssuanceCostsPreferredSecurities		USD
CY2010	us-gaap	Other Preferred Stock Dividends And Adjustments OtherPreferredStockDividendsAndAdjustments		USD
CY2012Q4	ppl	Undistributed Foreign Earnings Reinvested UndistributedForeignEarningsReinvested	2000000000	USD
CY2011Q4	ppl	Undistributed Foreign Earnings Reinvested UndistributedForeignEarningsReinvested	1200000000	USD
CY2012	ppl	Number Of Major Tax Jurisdictions NumberOfMajorTaxJurisdictions	5	Integer
CY2012	ppl	Tax Litigation Expensing Provision TaxLitigationExpensingProvision	0.50	pure
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	994000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1088000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1715000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	486000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	952000000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	287000000	USD
CY2012Q4	us-gaap	Tax Credit Carryforward Deferred Tax Asset TaxCreditCarryforwardDeferredTaxAsset	287000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	525000000	USD
CY2012Q4	ppl	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	130000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	124000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	276000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	524000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	305000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	239000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	706000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	6000000	USD
CY2012Q4	ppl	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions Foreign DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsForeign	254000000	USD
CY2012Q4	ppl	Foreign Deferred Tax Assets Regulatory Assets And Liabilities ForeignDeferredTaxAssetsRegulatoryAssetsAndLiabilities	27000000	USD
CY2012Q4	ppl	Deferred Tax Assets Other Foreign DeferredTaxAssetsOtherForeign	16000000	USD
CY2012Q4	ppl	Deferred Tax Assets Contribution In Aid Of Construction DeferredTaxAssetsContributionInAidOfConstruction	134000000	USD
CY2011Q4	ppl	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	113000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	149000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	325000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	305000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	272000000	USD
CY2011Q4	us-gaap	Tax Credit Carryforward Deferred Tax Asset TaxCreditCarryforwardDeferredTaxAsset	240000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	578000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	7000000	USD
CY2011Q4	ppl	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions Foreign DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensionsForeign	74000000	USD
CY2011Q4	ppl	Foreign Deferred Tax Assets Regulatory Assets And Liabilities ForeignDeferredTaxAssetsRegulatoryAssetsAndLiabilities	67000000	USD
CY2011Q4	ppl	Deferred Tax Assets Other Foreign DeferredTaxAssetsOtherForeign	21000000	USD
CY2011Q4	ppl	Deferred Tax Assets Contribution In Aid Of Construction DeferredTaxAssetsContributionInAidOfConstruction	133000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3967000000	USD
CY2012Q4	ppl	Deferred Tax Liabilities Taxes Recoverable Through Future Rates DeferredTaxLiabilitiesTaxesRecoverableThroughFutureRates	-141000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	122000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	319000000	USD
CY2012Q4	ppl	Deferred Tax Liabilities Reacquired Debt Costs DeferredTaxLiabilitiesReacquiredDebtCosts	40000000	USD
CY2012Q4	ppl	Deferred Tax Liabilities Property Plant And Equipment Foreign DeferredTaxLiabilitiesPropertyPlantAndEquipmentForeign	937000000	USD
CY2012Q4	ppl	Deferred Tax Liabilities Other Foreign DeferredTaxLiabilitiesOtherForeign		USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5592000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3465000000	USD
CY2011Q4	ppl	Deferred Tax Liabilities Taxes Recoverable Through Future Rates DeferredTaxLiabilitiesTaxesRecoverableThroughFutureRates	-137000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	331000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	234000000	USD
CY2011Q4	ppl	Deferred Tax Liabilities Reacquired Debt Costs DeferredTaxLiabilitiesReacquiredDebtCosts	93000000	USD
CY2011Q4	ppl	Deferred Tax Liabilities Property Plant And Equipment Foreign DeferredTaxLiabilitiesPropertyPlantAndEquipmentForeign	975000000	USD
CY2011Q4	ppl	Deferred Tax Liabilities Other Foreign DeferredTaxLiabilitiesOtherForeign	22000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5360000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	2141000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	229000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	724000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1789000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	66000000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	103000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-3451000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-3571000000	USD
CY2012	ppl	Investment Tax Credit Federal InvestmentTaxCreditFederal	10000000	USD
CY2012	ppl	Deferred Federal Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredFederalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-195000000	USD
CY2012	ppl	Deferred State And Local Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredStateAndLocalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-60000000	USD
CY2012	ppl	Deferred Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-255000000	USD
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	545000000	USD
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	348000000	USD
CY2012	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	41000000	USD
CY2012	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	156000000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit		USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-2000000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	121000000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	119000000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	553000000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	103000000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	35000000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	691000000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	54000000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-20000000	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	73000000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	107000000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	558000000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	127000000	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-23000000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	662000000	USD
CY2011	ppl	Investment Tax Credit Federal InvestmentTaxCreditFederal	10000000	USD
CY2011	ppl	Deferred Federal Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredFederalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-30000000	USD
CY2011	ppl	Deferred State And Local Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredStateAndLocalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-38000000	USD
CY2011	ppl	Deferred Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-68000000	USD
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	691000000	USD
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	572000000	USD
CY2011	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	69000000	USD
CY2011	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	50000000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-51000000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	43000000	USD
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	20000000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12000000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	358000000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-82000000	USD
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-9000000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	267000000	USD
CY2010	ppl	Investment Tax Credit Federal InvestmentTaxCreditFederal	5000000	USD
CY2012	ppl	Income Tax Expense In Other Comprehensive Income IncomeTaxExpenseInOtherComprehensiveIncome	-526000000	USD
CY2011	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	2000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	-141000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign		USD
CY2012	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	16000000	USD
CY2011	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-17000000	USD
CY2010	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-3000000	USD
CY2011	ppl	Income Tax Expense In Other Comprehensive Income IncomeTaxExpenseInOtherComprehensiveIncome	-137000000	USD
CY2011	ppl	Tax Benefit From Stock Options Exercised Offset Additional Paid In Capital TaxBenefitFromStockOptionsExercisedOffsetAdditionalPaidInCapital	3000000	USD
CY2011	ppl	Components Tax Expense Excluded Related To Validation Allowances For State Deferred Taxes ComponentsTaxExpenseExcludedRelatedToValidationAllowancesForStateDeferredTaxes	3000000	USD
CY2011	ppl	Tax Benefits Related To Issuance Of Purchase Contracts TaxBenefitsRelatedToIssuanceOfPurchaseContracts	5000000	USD
CY2010	ppl	Income Tax Expense In Other Comprehensive Income IncomeTaxExpenseInOtherComprehensiveIncome	83000000	USD
CY2012	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities		USD
CY2011	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities		USD
CY2010	ppl	Deferred Federal Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredFederalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	6000000	USD
CY2010	ppl	Deferred State And Local Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredStateAndLocalIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-17000000	USD
CY2010	ppl	Deferred Income Tax Expense Benefit Related To Operating Loss Carryforwards DeferredIncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-11000000	USD
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	263000000	USD
CY2010	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	308000000	USD
CY2010	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-56000000	USD
CY2010	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	11000000	USD
CY2012	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-4000000	USD
CY2012	ppl	Tax Benefit From Stock Options Exercised Offset Additional Paid In Capital TaxBenefitFromStockOptionsExercisedOffsetAdditionalPaidInCapital	-1000000	USD
CY2010	ppl	Tax Benefits Related To Issuance Of Purchase Contracts TaxBenefitsRelatedToIssuanceOfPurchaseContracts	10000000	USD
CY2010	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-6000000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	729000000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	770000000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	434000000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	27000000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	63000000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	36000000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	13000000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	36000000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-65000000	USD
CY2012	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-123000000	USD
CY2011	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-41000000	USD
CY2010	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-20000000	USD
CY2012	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	43000000	USD
CY2011	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	-14000000	USD
CY2010	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	34000000	USD
CY2012	ppl	Income Tax Reconciliation Tax Contingencies Domestic And State IncomeTaxReconciliationTaxContingenciesDomesticAndState	-1000000	USD
CY2011	ppl	Income Tax Reconciliation Tax Contingencies Domestic And State IncomeTaxReconciliationTaxContingenciesDomesticAndState	39000000	USD
CY2010	ppl	Income Tax Reconciliation Tax Contingencies Domestic And State IncomeTaxReconciliationTaxContingenciesDomesticAndState	-60000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	-5000000	USD
CY2010	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	11000000	USD
CY2012	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness		USD
CY2011	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness		USD
CY2010	us-gaap	Income Tax Reconciliation Disposition Of Business IncomeTaxReconciliationDispositionOfBusiness	-261000000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-75000000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-69000000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-18000000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	12000000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	13000000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	12000000	USD
CY2012	ppl	Depreciation Not Normalized DepreciationNotNormalized	-11000000	USD
CY2011	ppl	Depreciation Not Normalized DepreciationNotNormalized	-20000000	USD
CY2010	ppl	Depreciation Not Normalized DepreciationNotNormalized	-3000000	USD
CY2012	ppl	Income Tax Reconciliation Foreign Valuation Allowance Adjustments IncomeTaxReconciliationForeignValuationAllowanceAdjustments		USD
CY2011	ppl	Income Tax Reconciliation Foreign Valuation Allowance Adjustments IncomeTaxReconciliationForeignValuationAllowanceAdjustments	147000000	USD
CY2010	ppl	Income Tax Reconciliation Foreign Valuation Allowance Adjustments IncomeTaxReconciliationForeignValuationAllowanceAdjustments	215000000	USD
CY2012	ppl	Income Tax Reconciliation State Deferred Tax Change IncomeTaxReconciliationStateDeferredTaxChange	-19000000	USD
CY2011	ppl	Income Tax Reconciliation State Deferred Tax Change IncomeTaxReconciliationStateDeferredTaxChange	-26000000	USD
CY2010	ppl	Income Tax Reconciliation State Deferred Tax Change IncomeTaxReconciliationStateDeferredTaxChange		USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-9000000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-11000000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-11000000	USD
CY2012	ppl	Total Increase Decrease To Federal Income Tax On Income From Continuing Operations At Statuatory Tax Rate TotalIncreaseDecreaseToFederalIncomeTaxOnIncomeFromContinuingOperationsAtStatuatoryTaxRate	-184000000	USD
CY2011	ppl	Total Increase Decrease To Federal Income Tax On Income From Continuing Operations At Statuatory Tax Rate TotalIncreaseDecreaseToFederalIncomeTaxOnIncomeFromContinuingOperationsAtStatuatoryTaxRate	-79000000	USD
CY2010	ppl	Total Increase Decrease To Federal Income Tax On Income From Continuing Operations At Statuatory Tax Rate TotalIncreaseDecreaseToFederalIncomeTaxOnIncomeFromContinuingOperationsAtStatuatoryTaxRate	-171000000	USD
CY2012	ppl	Income Tax Reconciliation Deductions Medicare Prescription Drug Benefit Subsidy Revised IncomeTaxReconciliationDeductionsMedicarePrescriptionDrugBenefitSubsidyRevised		USD
CY2011	ppl	Income Tax Reconciliation Deductions Medicare Prescription Drug Benefit Subsidy Revised IncomeTaxReconciliationDeductionsMedicarePrescriptionDrugBenefitSubsidyRevised		USD
CY2010	ppl	Income Tax Reconciliation Deductions Medicare Prescription Drug Benefit Subsidy Revised IncomeTaxReconciliationDeductionsMedicarePrescriptionDrugBenefitSubsidyRevised	8000000	USD
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.262	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.314	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.212	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2012	ppl	Bonus Depreciation Rate BonusDepreciationRate	1.00	pure
CY2011	ppl	Bonus Depreciation Rate BonusDepreciationRate	1.00	pure
CY2011	ppl	Income Tax Reconciliation State Clarification Of Treatment Bonus Depreciation IncomeTaxReconciliationStateClarificationOfTreatmentBonusDepreciation	43000000	USD
CY2012	ppl	Net Operating Loss Limitation NetOperatingLossLimitation	0.20	pure
CY2011	ppl	Net Operating Loss Limitation NetOperatingLossLimitation	0.20	pure
CY2010	ppl	Net Operating Loss Limitation NetOperatingLossLimitation	0.20	pure
CY2012	ppl	Foreign Tax Rate Reduction Approved Current Year For Same Year ForeignTaxRateReductionApprovedCurrentYearForSameYear	0.24	pure
CY2012	ppl	Foreign Tax Rate Reduction Approved Current Year For Future Year ForeignTaxRateReductionApprovedCurrentYearForFutureYear	0.23	pure
CY2012	ppl	Foreign Tax Rate In Effect Prior To Reduction ForeignTaxRateInEffectPriorToReduction	0.25	pure
CY2011	ppl	Foreign Tax Rate In Effect Prior To Reduction ForeignTaxRateInEffectPriorToReduction	0.27	pure
CY2011	ppl	Foreign Tax Rate Reduction Approved Current Year For Same Year ForeignTaxRateReductionApprovedCurrentYearForSameYear	0.26	pure
CY2010	ppl	Foreign Tax Rate In Effect Prior To Reduction ForeignTaxRateInEffectPriorToReduction	0.28	pure
CY2010	ppl	Foreign Tax Rate Reduction Approved Current Year For Same Year ForeignTaxRateReductionApprovedCurrentYearForSameYear	0.27	pure
CY2011	ppl	Foreign Tax Rate Reduction Approved Current Year For Future Year ForeignTaxRateReductionApprovedCurrentYearForFutureYear	0.25	pure
CY2011	ppl	Income Tax Reconciliation Impact Of Foreign Subsidiary Certain Pension Contributions IncomeTaxReconciliationImpactOfForeignSubsidiaryCertainPensionContributions	28000000	USD
CY2010	ppl	Impact From Us Tax Court Decision On United Kingdom Windfall Profit Tax ImpactFromUsTaxCourtDecisionOnUnitedKingdomWindfallProfitTax	-42000000	USD
CY2010	ppl	Impact From Us Tax Court Decision On Street Lighting ImpactFromUsTaxCourtDecisionOnStreetLighting	-7000000	USD
CY2010	ppl	Depreciable Period Street Lighting Assets For Tax Purposes DepreciablePeriodStreetLightingAssetsForTaxPurposes	7	Integer
CY2012	ppl	Tax Benefit Related To Stranded Cost Securitization TaxBenefitRelatedToStrandedCostSecuritization	-6000000	USD
CY2011	ppl	Tax Benefit Related To Stranded Cost Securitization TaxBenefitRelatedToStrandedCostSecuritization	-6000000	USD
CY2011	ppl	Reconciliation Income Tax Expense Income Tax Benefit Related To Flow Through State Tax Depreciation ReconciliationIncomeTaxExpenseIncomeTaxBenefitRelatedToFlowThroughStateTaxDepreciation	3000000	USD
CY2011	ppl	Reconciliation Income Tax Expense Income Tax Benefit Related To Domestic Manufacturing Deduction ReconciliationIncomeTaxExpenseIncomeTaxBenefitRelatedToDomesticManufacturingDeduction	7000000	USD
CY2011	ppl	Reconciliation Income Tax Expense Tax Benefit Related To Reversal Tax Reserves For Capital Losses ReconciliationIncomeTaxExpenseTaxBenefitRelatedToReversalTaxReservesForCapitalLosses	-147000000	USD
CY2010	ppl	Tax Benefit Related To Stranded Cost Securitization TaxBenefitRelatedToStrandedCostSecuritization	-7000000	USD
CY2012	ppl	Income Tax Reconciliation Net Operating Loss Carryfoward Adjustment IncomeTaxReconciliationNetOperatingLossCarryfowardAdjustment	-9000000	USD
CY2011	ppl	Income Tax Reconciliation Net Operating Loss Carryfoward Adjustment IncomeTaxReconciliationNetOperatingLossCarryfowardAdjustment		USD
CY2010	ppl	Income Tax Reconciliation Net Operating Loss Carryfoward Adjustment IncomeTaxReconciliationNetOperatingLossCarryfowardAdjustment		USD
CY2012	ppl	Income Tax Reconciliation Foreign Intercompany Interest IncomeTaxReconciliationForeignIntercompanyInterest	-13000000	USD
CY2011	ppl	Income Tax Reconciliation Foreign Intercompany Interest IncomeTaxReconciliationForeignIntercompanyInterest	-12000000	USD
CY2010	ppl	Income Tax Reconciliation Foreign Intercompany Interest IncomeTaxReconciliationForeignIntercompanyInterest		USD
CY2012	ppl	Income Tax Reconciliation Minimum Property Value For Service Deadline Extension IncomeTaxReconciliationMinimumPropertyValueForServiceDeadlineExtension	1000000	USD
CY2012	ppl	Income Tax Reconciliation Minimum Production Period For Service Deadline Extension IncomeTaxReconciliationMinimumProductionPeriodForServiceDeadlineExtension	1	Integer
CY2012	ppl	Income Tax Reconciliation Minimum Tax Life For Service Deadline Extension IncomeTaxReconciliationMinimumTaxLifeForServiceDeadlineExtension	10	Integer
CY2012	ppl	Income Tax Expense Benefit Earnings Not Indefinitely Reinvested IncomeTaxExpenseBenefitEarningsNotIndefinitelyReinvested	19000000	USD
CY2012	ppl	Income Tax Expense Benefit Recalculation Foreign Earnings And Profits IncomeTaxExpenseBenefitRecalculationForeignEarningsAndProfits	23000000	USD
CY2012	ppl	Income Tax Reconciliation Prior Year Income Taxes Change In Accounting Method IncomeTaxReconciliationPriorYearIncomeTaxesChangeInAccountingMethod	5000000	USD
CY2012	ppl	Foreign Income Tax Return Adjustments ForeignIncomeTaxReturnAdjustments	-6000000	USD
CY2011	ppl	Foreign Income Tax Return Adjustments ForeignIncomeTaxReturnAdjustments		USD
CY2010	ppl	Foreign Income Tax Return Adjustments ForeignIncomeTaxReturnAdjustments		USD
CY2012	ppl	Taxes Other Than Income Foreign Property Tax Expense Benefit TaxesOtherThanIncomeForeignPropertyTaxExpenseBenefit	147000000	USD
CY2012	ppl	Taxes Other Than Income Domestic Property And Other TaxesOtherThanIncomeDomesticPropertyAndOther	75000000	USD
CY2012	ppl	Taxes Other Than Income Utility Realty Tax Expense Benefit TaxesOtherThanIncomeUtilityRealtyTaxExpenseBenefit	2000000	USD
CY2012	ppl	Taxes Other Than Income State Gross Receipts Tax Expense Benefit TaxesOtherThanIncomeStateGrossReceiptsTaxExpenseBenefit	135000000	USD
CY2012	ppl	Taxes Other Than Income State Capital Stock Tax Expense Benefit TaxesOtherThanIncomeStateCapitalStockTaxExpenseBenefit	7000000	USD
CY2011	ppl	Taxes Other Than Income State Gross Receipts Tax Expense Benefit TaxesOtherThanIncomeStateGrossReceiptsTaxExpenseBenefit	140000000	USD
CY2011	ppl	Taxes Other Than Income Utility Realty Tax Expense Benefit TaxesOtherThanIncomeUtilityRealtyTaxExpenseBenefit	-9000000	USD
CY2011	ppl	Taxes Other Than Income State Capital Stock Tax Expense Benefit TaxesOtherThanIncomeStateCapitalStockTaxExpenseBenefit	18000000	USD
CY2011	ppl	Taxes Other Than Income Foreign Property Tax Expense Benefit TaxesOtherThanIncomeForeignPropertyTaxExpenseBenefit	113000000	USD
CY2011	ppl	Taxes Other Than Income Domestic Property And Other TaxesOtherThanIncomeDomesticPropertyAndOther	64000000	USD
CY2010	ppl	Taxes Other Than Income State Gross Receipts Tax Expense Benefit TaxesOtherThanIncomeStateGrossReceiptsTaxExpenseBenefit	145000000	USD
CY2010	ppl	Taxes Other Than Income Utility Realty Tax Expense Benefit TaxesOtherThanIncomeUtilityRealtyTaxExpenseBenefit	5000000	USD
CY2010	ppl	Taxes Other Than Income State Capital Stock Tax Expense Benefit TaxesOtherThanIncomeStateCapitalStockTaxExpenseBenefit	6000000	USD
CY2010	ppl	Taxes Other Than Income Foreign Property Tax Expense Benefit TaxesOtherThanIncomeForeignPropertyTaxExpenseBenefit	52000000	USD
CY2010	ppl	Taxes Other Than Income Domestic Property And Other TaxesOtherThanIncomeDomesticPropertyAndOther	30000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	145000000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	251000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	92000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	15000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	61000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	3000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	9000000	USD
CY2012	ppl	Effects Of Foreign Currency Translation Unrecognized Tax Benefits EffectsOfForeignCurrencyTranslationUnrecognizedTaxBenefits		USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	40000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	160000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	25000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	4000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	10000000	USD
CY2011	ppl	Effects Of Foreign Currency Translation Unrecognized Tax Benefits EffectsOfForeignCurrencyTranslationUnrecognizedTaxBenefits	3000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities		USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Upper Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	10000000	USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Lower Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound	90000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	38000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	41000000	USD
CY2012Q4	ppl	Accrued Interest Related To Open Tax Positions AccruedInterestRelatedToOpenTaxPositions	-16000000	USD
CY2011Q4	ppl	Accrued Interest Related To Open Tax Positions AccruedInterestRelatedToOpenTaxPositions	-20000000	USD
CY2012	ppl	Interest Related To Open Tax Positions In Income Tax Expense InterestRelatedToOpenTaxPositionsInIncomeTaxExpense	-4000000	USD
CY2011	ppl	Interest Related To Open Tax Positions In Income Tax Expense InterestRelatedToOpenTaxPositionsInIncomeTaxExpense	27000000	USD
CY2010	ppl	Interest Related To Open Tax Positions In Income Tax Expense InterestRelatedToOpenTaxPositionsInIncomeTaxExpense	-39000000	USD
CY2012Q2	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	9900000	shares
CY2012Q2	ppl	Additional Shares To Be Purchased To Cover Over Allotments AdditionalSharesToBePurchasedToCoverOverAllotments	591000	shares
CY2012Q2	ppl	Forward Contract Indexed To Issuer Number Of Counterparties ForwardContractIndexedToIssuerNumberOfCounterparties	2	Integer
CY2012	ppl	Percentage Of Reduced Electricity Consumption Required By Act129 By2011 PercentageOfReducedElectricityConsumptionRequiredByAct129By2011	0.010	pure
CY2012	ppl	Proposed Cost Recovery Cap Over Year2006 Revenue ProposedCostRecoveryCapOverYear2006Revenue	0.020	pure
CY2012Q2	us-gaap	Forward Contract Indexed To Issuers Equity Indexed Shares ForwardContractIndexedToIssuersEquityIndexedShares	9900000	shares
CY2012	ppl	Percentage Of Reduced Electricity Consumption Under Phase Two Program PercentageOfReducedElectricityConsumptionUnderPhaseTwoProgram	0.021	pure
CY2012	ppl	Number Of Years Phase Two Program Is Effective NumberOfYearsPhaseTwoProgramIsEffective	3	Integer
CY2012	ppl	Minimum Duration Of Long Term Procurement Contracts MinimumDurationOfLongTermProcurementContracts	4	Integer
CY2012	ppl	Maximum Duration Of Long Term Procurement Contracts MaximumDurationOfLongTermProcurementContracts	20	Integer
CY2012	ppl	Maximum Percentage Of Long Term Contracts For Electric Generation Supply Service MaximumPercentageOfLongTermContractsForElectricGenerationSupplyService	0.25	pure
CY2012	ppl	Number Phases Investigation Retail Electricity Market NumberPhasesInvestigationRetailElectricityMarket	2	Integer
CY2011	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Interest Rate Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsInterestRateFairValueHedgeInsignificant	did not recognize
CY2012	ppl	Percentage Of Reduced Peak Demand Required By Act129 By2013 PercentageOfReducedPeakDemandRequiredByAct129By2013	0.045	pure
CY2012	ppl	Number Of Hours That Are Benchmark For Demand Reductions NumberOfHoursThatAreBenchmarkForDemandReductions	100	Integer
CY2012	ppl	Percentage Of Reduced Electricity Consumption Required By Act129 By2013 PercentageOfReducedElectricityConsumptionRequiredByAct129By2013	0.030	pure
CY2012	ppl	Period To Provide Comment PeriodToProvideComment	30	Integer
CY2012	ppl	Default Service End State Possible Models DefaultServiceEndStatePossibleModels	3	Integer
CY2012	ppl	Ratemaking Mechanisms Authorized For Approval RatemakingMechanismsAuthorizedForApproval	2	Integer
CY2012	ppl	Federal Energy Regulatory Commission Formula Requested Recovery Period FederalEnergyRegulatoryCommissionFormulaRequestedRecoveryPeriod	34	Integer
CY2012Q4	ppl	Federal Energy Regulatory Commission Formula Regulatory Asset Recorded For Certain Deferred State Tax Assets FederalEnergyRegulatoryCommissionFormulaRegulatoryAssetRecordedForCertainDeferredStateTaxAssets	52000000	USD
CY2012Q4	ppl	Projected Amount To Comply With Overhead Clearance Standard ProjectedAmountToComplyWithOverheadClearanceStandard	94000000	USD
CY2011Q4	ppl	Projected Amount To Comply With Overhead Clearance Standard ProjectedAmountToComplyWithOverheadClearanceStandard	170000000	USD
CY2012	ppl	Number Potential Changes Cited Consultation Paper NumberPotentialChangesCitedConsultationPaper	2	Integer
CY2012	ppl	Maximum Recoverable Cost MaximumRecoverableCost	250000000	USD
CY2011Q4	ppl	Federal Energy Regulatory Commission Formula Regulatory Asset Recorded For Certain Deferred State Tax Assets FederalEnergyRegulatoryCommissionFormulaRegulatoryAssetRecordedForCertainDeferredStateTaxAssets	53000000	USD
CY2012	ppl	Maximum Depreciable Life For New Smart Meter Technology In New Construction MaximumDepreciableLifeForNewSmartMeterTechnologyInNewConstruction	15	Integer
CY2012	ppl	Projected Numbers Of Years To Conduct Study On Smart Meters ProjectedNumbersOfYearsToConductStudyOnSmartMeters	5	Integer
CY2012Q4	ppl	Estimated Cost Of Study On Expanded Use Of Smart Meter EstimatedCostOfStudyOnExpandedUseOfSmartMeter	38000000	USD
CY2012	ppl	Regulatory Matters Long Term Infrastructure Improvement Plan Minimum Term RegulatoryMattersLongTermInfrastructureImprovementPlanMinimumTerm	5	Integer
CY2012	ppl	Regulatory Matters Long Term Infrastructure Improvement Plan Maximum Term RegulatoryMattersLongTermInfrastructureImprovementPlanMaximumTerm	10	Integer
CY2012	ppl	Regulator Matters Number Of Scrubbers Authorized RegulatorMattersNumberOfScrubbersAuthorized	2	Integer
CY2012	ppl	Reduction In Amount To Comply With Distribution Price Control Review ReductionInAmountToComplyWithDistributionPriceControlReview	79000000	USD
CY2012	ppl	Reduction In Amount To Comply With Distribution Price Control Review1 ReductionInAmountToComplyWithDistributionPriceControlReview1	11000000	USD
CY2012Q2	us-gaap	Forward Contract Indexed To Issuers Equity Settlement Date Or Dates ForwardContractIndexedToIssuersEquitySettlementDateOrDates	2013-04-30
CY2012	us-gaap	Equity Issuance Dates EquityIssuanceDates	2012-04-30
CY2012Q2	ppl	Forward Contract Indexed To Issuers Equity Over Allotment Shares ForwardContractIndexedToIssuersEquityOverAllotmentShares	591000	shares
CY2012Q2	ppl	Forward Contract Indexed To Issuers Equity Settlement Date Or Dates Subsequent ForwardContractIndexedToIssuersEquitySettlementDateOrDatesSubsequent	2012-07-30
CY2012Q2	us-gaap	Forward Contract Indexed To Issuers Equity Forward Rate ForwardContractIndexedToIssuersEquityForwardRate	27.02
CY2013Q1	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2013-04-01
CY2013Q1	ppl	Common Stock Dividends Per Share Declared As Per Annum Equivalent CommonStockDividendsPerShareDeclaredAsPerAnnumEquivalent	1.47
CY2013Q1	ppl	Quarterly Common Stock Dividend Change QuarterlyCommonStockDividendChange	0.3675
CY2012	ppl	Minimum Adjusted Equity Ratio To Total Capitalization To Pay Dividends MinimumAdjustedEquityRatioToTotalCapitalizationToPayDividends	0.30	pure
CY2012Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	19435000000	USD
CY2013Q4	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2013-01-02
CY2011Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	17982000000	USD
CY2013Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.360
CY2013Q4	ppl	Common Stock Dividends Per Share Declared As Per Annum Equivalent CommonStockDividendsPerShareDeclaredAsPerAnnumEquivalent	1.44
CY2013Q4	us-gaap	Dividends Payable Date Declared Month And Year DividendsPayableDateDeclaredMonthAndYear	2012-11
CY2013Q1	us-gaap	Dividends Payable Date Declared Month And Year DividendsPayableDateDeclaredMonthAndYear	2013-02
CY2012Q4	ppl	Balance Increase Amount Restricted For Dividends BalanceIncreaseAmountRestrictedForDividends	2300000000	USD
CY2012Q4	ppl	Balance Increase Amount Available For Dividends BalanceIncreaseAmountAvailableForDividends	2300000000	USD
CY2011Q2	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	92000000	shares
CY2011Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	25.30
CY2011Q2	us-gaap	Stock Issued During Period Value Issued For Cash StockIssuedDuringPeriodValueIssuedForCash	2328000000	USD
CY2011Q2	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	2258000000	USD
CY2011Q2	ppl	Underwriting Discount Incurred With Specific Equity Offering UnderwritingDiscountIncurredWithSpecificEquityOffering	70000000	USD
CY2010Q2	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	103500000	shares
CY2010Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	24.00
CY2010Q2	us-gaap	Stock Issued During Period Value Issued For Cash StockIssuedDuringPeriodValueIssuedForCash	2484000000	USD
CY2010Q2	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	2409000000	USD
CY2010Q2	ppl	Underwriting Discount Incurred With Specific Equity Offering UnderwritingDiscountIncurredWithSpecificEquityOffering	75000000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-37000000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-54000000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	19476000000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	17993000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	751000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	328000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1317000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	828000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	118000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	16093000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	37000000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	116000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	109000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	106000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	85000000	USD
CY2012	ppl	Loss Contingency Interest Accrual Rate LossContingencyInterestAccrualRate	0.1	pure
CY2011	ppl	Loss Contingency Pre Tax Loss Accrual Reversal LossContingencyPreTaxLossAccrualReversal	89000000	USD
CY2010	ppl	Pretax Gain Loss On Discontinuation Of Interest Rate Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring PretaxGainLossOnDiscontinuationOfInterestRateCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring	-29000000	USD
CY2010	us-gaap	Gain Loss On Discontinuation Of Interest Rate Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfInterestRateCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	-19000000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	90000000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	109000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	21000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	149000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	507000000	USD
CY2012	ppl	Environmental Protection Agency Standard Drinking Water Related To Arsenic EnvironmentalProtectionAgencyStandardDrinkingWaterRelatedToArsenic	10	Integer
CY2011	ppl	Loss Contingency After Tax Loss Accrual Reversal LossContingencyAfterTaxLossAccrualReversal	53000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	21000000	USD
CY2012	us-gaap	Bankruptcy Claims Amount Of Claims Filed BankruptcyClaimsAmountOfClaimsFiled	375000000	USD
CY2012Q4	ppl	Coal Industry Retiree Health Benefit Act Of1992 Net Recorded Liability CoalIndustryRetireeHealthBenefitActOf1992NetRecordedLiability	3000000	USD
CY2012Q4	us-gaap	Coal Industry Retiree Health Benefit Act Of1992 Estimated Amount Of Total Obligation CoalIndustryRetireeHealthBenefitActOf1992EstimatedAmountOfTotalObligation	67000000	USD
CY2012Q4	ppl	Coal Industry Retiree Health Benefit Act Of1992 Assets In Voluntary Employee Benefit Association Trust CoalIndustryRetireeHealthBenefitActOf1992AssetsInVoluntaryEmployeeBenefitAssociationTrust	35000000	USD
CY2012Q4	ppl	Coal Industry Retiree Health Benefit Act Of1992 Assets In Black Lung Trust CoalIndustryRetireeHealthBenefitActOf1992AssetsInBlackLungTrust	29000000	USD
CY2012	ppl	Number Pounds Per Ton Carbon Dioxide Emissions NumberPoundsPerTonCarbonDioxideEmissions	2000
CY2012	ppl	Legal Matters Intent To Sue Number Of Notice LegalMattersIntentToSueNumberOfNotice	4	Integer
CY2012	ppl	Loss Contingency Period To File LossContingencyPeriodToFile	60	Integer
	ppl	Number Of Claims Remaining Against Company For Spot Market Bilateral Sales NumberOfClaimsRemainingAgainstCompanyForSpotMarketBilateralSales	2	Integer
	ppl	Amount For Claims Remaining Against Company For Spot Market Bilateral Sales AmountForClaimsRemainingAgainstCompanyForSpotMarketBilateralSales	73000000	USD
CY2012	ppl	Environmental Protection Agency Estimated Increase In Risk Of Cancer Caused By Arsenic Exposure EnvironmentalProtectionAgencyEstimatedIncreaseInRiskOfCancerCausedByArsenicExposure	20
CY2012	ppl	Environmental Protection Agency Proposed Standard For Arsenic Particles In Drinking Water EnvironmentalProtectionAgencyProposedStandardForArsenicParticlesInDrinkingWater	0.1	PartsPerBillion
CY2012	ppl	Number Of Subsidiaries Pumping Mine Water NumberOfSubsidiariesPumpingMineWater	1	Integer
CY2012	ppl	Number Of Mine Sites Being Pumped And Treated NumberOfMineSitesBeingPumpedAndTreated	2	Integer
CY2010	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	49000000	USD
CY2012	ppl	Loss Contingency Settlement Value LossContingencySettlementValue	75000	USD
CY2012	us-gaap	Loss Contingency Damages Sought Value LossContingencyDamagesSoughtValue	23000000	USD
CY2012	ppl	Loss Contingency Damages Sought Interest LossContingencyDamagesSoughtInterest	9000000	USD
CY2012	ppl	Number Of Mine Sites Being Treated NumberOfMineSitesBeingTreated	1	Integer
CY2012Q4	us-gaap	Site Contingency Accrual Present Value SiteContingencyAccrualPresentValue	26000000	USD
CY2012	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	59000000	USD
CY2011	us-gaap	Multiemployer Plans Plan Contributions MultiemployerPlansPlanContributions	67000000	USD
CY2012	ppl	Amount For Claims Remaining Against Company For Spot Market Bilateral Sales AmountForClaimsRemainingAgainstCompanyForSpotMarketBilateralSales	50000000	USD
CY2012	ppl	Initial Time Period Required To Respond To Info Request InitialTimePeriodRequiredToRespondToInfoRequest	3	Integer
CY2012	ppl	Period Of Time To Pump And Treat Ground Water At Two Mine Sites PeriodOfTimeToPumpAndTreatGroundWaterAtTwoMineSites	50	Integer
CY2012	ppl	Number Of Indirect Subsidiaries Cited Greenhouse Gas Case NumberOfIndirectSubsidiariesCitedGreenhouseGasCase	3	Integer
CY2012	ppl	Subsequent Frequency Required To Respond To Info Request SubsequentFrequencyRequiredToRespondToInfoRequest	3	Integer
CY2012	ppl	Maximum Per Day Penalty Federal Energy Regulatory Commission May Assess Under Reliability Standards MaximumPerDayPenaltyFederalEnergyRegulatoryCommissionMayAssessUnderReliabilityStandards	1000000	USD
CY2012Q4	us-gaap	Accrual For Environmental Loss Contingencies Discount Rate AccrualForEnvironmentalLossContingenciesDiscountRate	0.0819	pure
CY2011Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	14000000	USD
CY2011	ppl	Spent Nuclear Fuel Litigation Settlement Proceeds SpentNuclearFuelLitigationSettlementProceeds	56000000	USD
CY2012Q4	ppl	Property Plant And Equipment Carrying Value Held Not Used PropertyPlantAndEquipmentCarryingValueHeldNotUsed	68000000	USD
CY2012Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due Within One Year AccrualForEnvironmentalLossContingenciesUndiscountedDueWithinOneYear	3000000	USD
CY2012	ppl	Carbon Dioxide Emitted Power Plants During Reporting Period CarbonDioxideEmittedPowerPlantsDuringReportingPeriod	70000000	USD
CY2012	ppl	Number Electric Utilities Ordered To Enter Into Long Term Contracts NumberElectricUtilitiesOrderedToEnterIntoLongTermContracts	3	Integer
CY2012	ppl	Capacity Of Natural Gas Fired Combined Cycle Generating Facility CapacityOfNaturalGasFiredCombinedCycleGeneratingFacility	661	MW
CY2012	ppl	Long Term Purchase Commitment Modification Charges LongTermPurchaseCommitmentModificationCharges	29000000	USD
CY2012	ppl	Percentage Of Leasehold Interest In Colstrip Units1 And2 PercentageOfLeaseholdInterestInColstripUnits1And2	0.50	pure
CY2012	ppl	Percentage Of Leasehold Interest In Colstrip Unit3 PercentageOfLeaseholdInterestInColstripUnit3	0.30	pure
CY2012	ppl	Proportionate Share By Each Party Of Operating And Construction Costs Regarding Colstrip Unit3 Or4 ProportionateShareByEachPartyOfOperatingAndConstructionCostsRegardingColstripUnit3Or4	0.15	pure
CY2011	ppl	Percentage Of Leasehold Interest In Colstrip Units1 And2 PercentageOfLeaseholdInterestInColstripUnits1And2	0.50	pure
CY2011	ppl	Percentage Of Leasehold Interest In Colstrip Unit3 PercentageOfLeaseholdInterestInColstripUnit3	0.30	pure
CY2011	ppl	Proportionate Share By Each Party Of Operating And Construction Costs Regarding Colstrip Unit3 Or4 ProportionateShareByEachPartyOfOperatingAndConstructionCostsRegardingColstripUnit3Or4	0.15	pure
CY2012	ppl	Percentage Of Interest By North Western In Colstrip Unit4 PercentageOfInterestByNorthWesternInColstripUnit4	0.30	pure
CY2011	ppl	Percentage Of Interest By North Western In Colstrip Unit4 PercentageOfInterestByNorthWesternInColstripUnit4	0.30	pure
CY2012Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	24000000	USD
CY2012Q4	ppl	Deductible For Bodily Injury And Property Damage DeductibleForBodilyInjuryAndPropertyDamage	4000000	USD
CY2012Q4	ppl	Maximum Aggregate Coverage Bodily Injury And Property Damage MaximumAggregateCoverageBodilyInjuryAndPropertyDamage	200000000	USD
CY2012	ppl	Competitive Solicitations To Be Held For Provider Of Last Resort Supply Post2010 Shortest Term Purchase CompetitiveSolicitationsToBeHeldForProviderOfLastResortSupplyPost2010ShortestTermPurchase	5	Integer
CY2012	ppl	Competitive Solicitations To Be Held For Provider Of Last Resort Supply Post2010 Longest Term Purchase CompetitiveSolicitationsToBeHeldForProviderOfLastResortSupplyPost2010LongestTermPurchase	10	Integer
CY2012	ppl	Through20002006 Compensation Awarded For Lease Payment Under Hydro Electric Litigation For Riverbed Use Through20002006CompensationAwardedForLeasePaymentUnderHydroElectricLitigationForRiverbedUse	35000000	USD
CY2012	ppl	Statutory Period After Order For Compliance With Maximum Achievable Control Technology Standards StatutoryPeriodAfterOrderForComplianceWithMaximumAchievableControlTechnologyStandards	3	Integer
CY2012	ppl	Statutory Period After Order For Extension With Maximum Achievable Control Technology Standards StatutoryPeriodAfterOrderForExtensionWithMaximumAchievableControlTechnologyStandards	1	Integer
CY2012Q4	ppl	Proportionate Share Of Ohio Valley Electric Corporation Outstanding Debt ProportionateShareOfOhioValleyElectricCorporationOutstandingDebt	135000000	USD
CY2012	ppl	Number Hydro Electric Facilities In Montana NumberHydroElectricFacilitiesInMontana	11	Integer
CY2012	ppl	Number Of States Signing Memorandum Of Understanding Establishing Regional Greenhouse Gas Initiative NumberOfStatesSigningMemorandumOfUnderstandingEstablishingRegionalGreenhouseGasInitiative	10	Integer
CY2012	ppl	Threshold Capacity Of Electric Power Plants Under Memorandum Of Understanding Establishing Regional Greenhouse Gas Initiative ThresholdCapacityOfElectricPowerPlantsUnderMemorandumOfUnderstandingEstablishingRegionalGreenhouseGasInitiative	25	MW
CY2012Q4	ppl	Number Storage Reservoirs In Montana NumberStorageReservoirsInMontana	1	Integer
CY2012	ppl	Percentage Reduction Carbon Dioxide From Base By2019 Per Regional Greenhouse Gas Initiative PercentageReductionCarbonDioxideFromBaseBy2019PerRegionalGreenhouseGasInitiative	0.10	pure
CY2012	ppl	Percentage Reduction Greenhouse Gas By2020 Per Pennsylvania Advisory Climate Change Action Report PercentageReductionGreenhouseGasBy2020PerPennsylvaniaAdvisoryClimateChangeActionReport	0.30	pure
CY2012	ppl	Term Company Required To Operate Kerr Dam Project TermCompanyRequiredToOperateKerrDamProject	30	Integer
CY2012	ppl	Proposed Mandatory Percentage Of Efficiency Improvements Power Per Plants Pennsylvania Advisory Climate Change Action Report ProposedMandatoryPercentageOfEfficiencyImprovementsPowerPerPlantsPennsylvaniaAdvisoryClimateChangeActionReport	0.05	pure
CY2012Q4	ppl	Period End Estimate Of Remaining Commitment On Kerr Dam Project PeriodEndEstimateOfRemainingCommitmentOnKerrDamProject	6000000	USD
CY2012Q4	ppl	Number Of Memoranda Of Understandings Related To Missouri Madison Project NumberOfMemorandaOfUnderstandingsRelatedToMissouriMadisonProject	2	Integer
CY2012	ppl	Number Of Western States Covered By Western Climate Initiative NumberOfWesternStatesCoveredByWesternClimateInitiative	11	Integer
CY2012	ppl	Percentage Reduction Carbon Dioxide By2020 Below2005 Level Per Western Climate Initiative PercentageReductionCarbonDioxideBy2020Below2005LevelPerWesternClimateInitiative	0.15	pure
CY2012Q4	ppl	Accrual For Environmental Loss Contingencies Undiscounted Expected Payments Each Of Year Two Through Four AccrualForEnvironmentalLossContingenciesUndiscountedExpectedPaymentsEachOfYearTwoThroughFour	1000000	USD
CY2012Q4	us-gaap	Accrual For Environmental Loss Contingencies Undiscounted Due After Fifth Year AccrualForEnvironmentalLossContingenciesUndiscountedDueAfterFifthYear	139000000	USD
CY2012	ppl	Projected Amount To Implement Flood Prevention Measures ProjectedAmountToImplementFloodPreventionMeasures	45000000	USD
CY2012	ppl	Number Companies Cited Greenhouse Gas Case NumberCompaniesCitedGreenhouseGasCase	87	Integer
CY2012	ppl	Number Of Electric Utility Companies That Could Be Sued Under Federal Common Law NumberOfElectricUtilityCompaniesThatCouldBeSuedUnderFederalCommonLaw	5	Integer
CY2012	ppl	Number Of Approaches Proposed By Environmental Protection Agency To Regulate Coal Combustion Residuals June2010 NumberOfApproachesProposedByEnvironmentalProtectionAgencyToRegulateCoalCombustionResidualsJune2010	2	Integer
CY2012	ppl	Coal Combustion Residual Intent To Sue Number Of Companies CoalCombustionResidualIntentToSueNumberOfCompanies	2	Integer
CY2012	ppl	Amount Of Gallons Of Pollutants Released Into Environment At Facility AmountOfGallonsOfPollutantsReleasedIntoEnvironmentAtFacility	100000000
CY2012	ppl	Number Of Units At Facility Where Environmental Issue Occurred NumberOfUnitsAtFacilityWhereEnvironmentalIssueOccurred	2	Integer
CY2012	ppl	Number Of Dams Related To Missouri Madison Project NumberOfDamsRelatedToMissouriMadisonProject	9	Integer
CY2012Q4	ppl	Estimate Of Remaining Commitment On Specific Missouri Madison Project EstimateOfRemainingCommitmentOnSpecificMissouriMadisonProject	30000000	USD
CY2012	ppl	Total Term Of Kerr Dam Project License TotalTermOfKerrDamProjectLicense	50	Integer
CY2012	ppl	Megawatt Capacity Of Each Unit At Facility Where Environmental Issue Occurred MegawattCapacityOfEachUnitAtFacilityWhereEnvironmentalIssueOccurred	150	MW
CY2012Q4	ppl	Renewable Energy Legislation Program Funding Total RenewableEnergyLegislationProgramFundingTotal	25000000	USD
CY2012	ppl	Clean Water Act Renewal Period CleanWaterActRenewalPeriod	5	Integer
CY2012	ppl	Environmental Protection Number Of Factors To Make Site Specific Determination EnvironmentalProtectionNumberOfFactorsToMakeSiteSpecificDetermination	9	Integer
CY2012Q4	ppl	Environmental Remediation Costs Paid EnvironmentalRemediationCostsPaid	28000000	USD
CY2012	us-gaap	Loss Contingency Number Of Plaintiffs LossContingencyNumberOfPlaintiffs	6	Integer
CY2012	ppl	Period To Complete Settlement In Days PeriodToCompleteSettlementInDays	60	Integer
CY2012	ppl	Environmental Matters Administrative Order On Consent Period To Provide Assurance EnvironmentalMattersAdministrativeOrderOnConsentPeriodToProvideAssurance	5	Integer
CY2012	ppl	Notices Of Data Availability Issued NoticesOfDataAvailabilityIssued	2	Integer
CY2012	ppl	Environmental Protection Rule On Impact Of Cooling Towers On Aquatic Organisms EnvironmentalProtectionRuleOnImpactOfCoolingTowersOnAquaticOrganisms	2	Integer
CY2012	ppl	Number Of Years Flood Prevention Costs To Be Recovered Through Rates NumberOfYearsFloodPreventionCostsToBeRecoveredThroughRates	10	Integer
CY2012Q4	ppl	Maximum Amount Of Insured Property Damages Losses Coverage Nuclear Plant MaximumAmountOfInsuredPropertyDamagesLossesCoverageNuclearPlant	2750000000	USD
CY2012Q4	ppl	Maximum Assessment Retroactive Premiums Insured Outage Loss Coverage MaximumAssessmentRetroactivePremiumsInsuredOutageLossCoverage	48000000	USD
CY2012Q4	ppl	Maximum Amount For Public Liability Claims For Nuclear Incident MaximumAmountForPublicLiabilityClaimsForNuclearIncident	12600000000	USD
CY2012Q4	ppl	Maximum Amount Assessed For Nuclear Incident MaximumAmountAssessedForNuclearIncident	235000000	USD
CY2012Q4	ppl	Maximum Amount Payable Per Year Assessed For Nuclear Incident MaximumAmountPayablePerYearAssessedForNuclearIncident	35000000	USD
CY2012	ppl	Number Phases Cross State Air Pollution Rule Be Implemented NumberPhasesCrossStateAirPollutionRuleBeImplemented	2	Integer
CY2012Q4	ppl	Sulfur Dioxide Emissions Standard SulfurDioxideEmissionsStandard	1	Integer
CY2011	ppl	Carbon Dioxide Emitted Power Plants During Reporting Period CarbonDioxideEmittedPowerPlantsDuringReportingPeriod	74000000
CY2011	ppl	Loss Contingency After Tax Loss Accrual Reversal Impact To Interest Expense LossContingencyAfterTaxLossAccrualReversalImpactToInterestExpense	14000000	USD
CY2011	ppl	Loss Contingency After Tax Loss Accrual Reversal Impact To Other Operation Maintenance LossContingencyAfterTaxLossAccrualReversalImpactToOtherOperationMaintenance	75000000	USD
CY2010	ppl	Loss Contingency Loss In Period Related To Prior Periods Net Of Tax LossContingencyLossInPeriodRelatedToPriorPeriodsNetOfTax	32000000	USD
CY2010	ppl	Loss Contingency Loss In Period Related To Prior Periods LossContingencyLossInPeriodRelatedToPriorPeriods	54000000	USD
CY2010	ppl	Loss Contingency Loss In Period Recorded In Interest Expense LossContingencyLossInPeriodRecordedInInterestExpense	7000000	USD
CY2010	ppl	Loss Contingency Loss In Period Net Of Tax LossContingencyLossInPeriodNetOfTax	34000000	USD
CY2010	ppl	Loss Contingency Loss In Period Recorded In Operating Expenses LossContingencyLossInPeriodRecordedInOperatingExpenses	49000000	USD
CY2010	ppl	Hydro Loss Contingency Loss In Period Pre Tax HydroLossContingencyLossInPeriodPreTax	56000000	USD
CY2012	ppl	Cross State Air Pollution Rule Number Of Years For Revised Rule CrossStateAirPollutionRuleNumberOfYearsForRevisedRule	2	Integer
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	42000000	USD
CY2011	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	127000000	USD
CY2010	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	39000000	USD
CY2011	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	123000000	USD
CY2011Q4	ppl	Total Exposure Hedged Foreign Currency Contracts Classifed As Economic Activity TotalExposureHedgedForeignCurrencyContractsClassifedAsEconomicActivity	288000000	GBP
CY2010	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	70000000	USD
CY2012	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	81000000	USD
CY2012	ppl	Combustion Residual Intent To Sue Period Of Notice CombustionResidualIntentToSuePeriodOfNotice	60	Integer
CY2012	ppl	Maximum Length Of Time Hedged In Interest Rate Economic Activity Hedge MaximumLengthOfTimeHedgedInInterestRateEconomicActivityHedge	2033
CY2012Q4	ppl	Weighted Average Coupon Of Nuclear Decommissioning Trust Funds Debt Securities WeightedAverageCouponOfNuclearDecommissioningTrustFundsDebtSecurities	0.0411	pure
CY2012Q4	ppl	Weighted Average Maturity For Debt Securities Held By Nuclear Decommissioning Trust Funds WeightedAverageMaturityForDebtSecuritiesHeldByNuclearDecommissioningTrustFunds	8.26	Integer
CY2012Q4	ppl	Concentration Risk Credit Risk Fin Instrument Maximum Exposure ConcentrationRiskCreditRiskFinInstrumentMaximumExposure	1800000000	USD
CY2012Q4	ppl	Fair Value Concentration Of Credit Risk After Master Netting Collateral Arrangements FairValueConcentrationOfCreditRiskAfterMasterNettingCollateralArrangements	688000000	USD
CY2012Q4	ppl	Dollar Exposure To Top Ten Counterparties DollarExposureToTopTenCounterparties	367000000	USD
CY2012Q4	ppl	Percentage Exposure To Top Ten Counterparties PercentageExposureToTopTenCounterparties	0.53	pure
CY2012Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	112000000	USD
CY2011Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	147000000	USD
CY2012Q4	ppl	Cash Collateral Posted Under Master Netting Arrangements CashCollateralPostedUnderMasterNettingArrangements	32000000	USD
CY2011Q4	ppl	Cash Collateral Posted Under Master Netting Arrangements CashCollateralPostedUnderMasterNettingArrangements	29000000	USD
CY2012	ppl	Maximum Length Of Time Hedged In Price Risk Cash Flow Hedge2 MaximumLengthOfTimeHedgedInPriceRiskCashFlowHedge2	2016
CY2010	us-gaap	Gain Loss On Discontinuation Of Price Risk Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfPriceRiskCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	-89000000	USD
CY2012Q4	us-gaap	Price Risk Cash Flow Hedge Unrealized Gain Loss To Be Reclassified During Next12 Months PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months	124000000	USD
CY2012	ppl	Price Risk Cash Flow Hedge Gain Loss Reclassified To Earnings Net Text PriceRiskCashFlowHedgeGainLossReclassifiedToEarningsNetText	insignificant
CY2011	ppl	Price Risk Cash Flow Hedge Gain Loss Reclassified To Earnings Net Text PriceRiskCashFlowHedgeGainLossReclassifiedToEarningsNetText	insignificant
CY2011	us-gaap	Gain Loss On Price Risk Cash Flow Hedge Ineffectiveness GainLossOnPriceRiskCashFlowHedgeIneffectiveness	-22000000	USD
CY2010	us-gaap	Gain Loss On Price Risk Cash Flow Hedge Ineffectiveness GainLossOnPriceRiskCashFlowHedgeIneffectiveness	-30000000	USD
CY2010	ppl	After Tax Gain Loss Recognized Risk Cash Flow Hedge Current Effectiveness Failures AfterTaxGainLossRecognizedRiskCashFlowHedgeCurrentEffectivenessFailures	-82000000	USD
CY2012	ppl	Maximum Maturity Date Of Economic Activity Instruments MaximumMaturityDateOfEconomicActivityInstruments	2019
CY2012Q4	ppl	Fair Value Commodity Derivative Contracts Classified Economic Activity FairValueCommodityDerivativeContractsClassifiedEconomicActivity	346000000	USD
CY2011Q4	ppl	Fair Value Commodity Derivative Contracts Classified Economic Activity FairValueCommodityDerivativeContractsClassifiedEconomicActivity	-63000000	USD
CY2012	ppl	Maximum Length Of Time Hedged In Interest Rate Cash Flow Hedge2 MaximumLengthOfTimeHedgedInInterestRateCashFlowHedge2	2043
CY2012Q4	us-gaap	Notional Amount Of Interest Rate Cash Flow Hedge Derivatives NotionalAmountOfInterestRateCashFlowHedgeDerivatives	1200000000	USD
CY2011Q2	us-gaap	Gain Loss On Interest Rate Cash Flow Hedge Ineffectiveness GainLossOnInterestRateCashFlowHedgeIneffectiveness	-4000000	USD
CY2011	us-gaap	Gain Loss On Interest Rate Cash Flow Hedge Ineffectiveness GainLossOnInterestRateCashFlowHedgeIneffectiveness	-9000000	USD
CY2012	us-gaap	Interest Rate Cash Flow Hedge Ineffectiveness Is Immaterial InterestRateCashFlowHedgeIneffectivenessIsImmaterial	insignificant
CY2012Q4	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	-13000000	USD
CY2010	us-gaap	Ineffectiveness On Interest Rate Fair Value Hedges Is Immaterial IneffectivenessOnInterestRateFairValueHedgesIsImmaterial	did not recognize
CY2010	ppl	Gain Loss On Components Excluded From Assessment Of Interest Rate Fair Value Hedge Effectiveness Insignificant GainLossOnComponentsExcludedFromAssessmentOfInterestRateFairValueHedgeEffectivenessInsignificant	did not recognize
CY2010	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Interest Rate Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsInterestRateFairValueHedgeInsignificant	did not recognize
CY2012	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Interest Rate Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsInterestRateFairValueHedgeInsignificant	did not recognize
CY2012	ppl	Gain Loss On Components Excluded From Assessment Of Interest Rate Fair Value Hedge Effectiveness Insignificant GainLossOnComponentsExcludedFromAssessmentOfInterestRateFairValueHedgeEffectivenessInsignificant	did not recognize
CY2012	us-gaap	Ineffectiveness On Interest Rate Fair Value Hedges Is Immaterial IneffectivenessOnInterestRateFairValueHedgesIsImmaterial	did not recognize
CY2012Q3	ppl	Maximum Length Of Time Hedged In Interest Rate Fair Value Hedge MaximumLengthOfTimeHedgedInInterestRateFairValueHedge	2047
CY2012Q3	us-gaap	Notional Amount Of Interest Rate Fair Value Hedge Derivatives NotionalAmountOfInterestRateFairValueHedgeDerivatives	99000000	USD
CY2011	us-gaap	Ineffectiveness On Interest Rate Fair Value Hedges Is Immaterial IneffectivenessOnInterestRateFairValueHedgesIsImmaterial	did not recognize
CY2011	ppl	Gain Loss On Components Excluded From Assessment Of Interest Rate Fair Value Hedge Effectiveness Insignificant GainLossOnComponentsExcludedFromAssessmentOfInterestRateFairValueHedgeEffectivenessInsignificant	did not recognize
CY2012Q4	ppl	Baseload Generation Fleet Generating Capacity BaseloadGenerationFleetGeneratingCapacity	7275	MW
CY2012Q4	us-gaap	Notional Amount Of Nonderivative Instruments Designated As Net Investment Hedges NotionalAmountOfNonderivativeInstrumentsDesignatedAsNetInvestmentHedges	76000000	USD
CY2012Q4	ppl	Intermediate And Peaking Fleet Generating Capacity IntermediateAndPeakingFleetGeneratingCapacity	3316	MW
CY2012Q4	ppl	Notional Amount Of Interest Rate Swaps Classified Economic Activity NotionalAmountOfInterestRateSwapsClassifiedEconomicActivity	179000000	USD
CY2012Q4	ppl	Fair Value Interest Rate Swaps Classifed Economic Activity FairValueInterestRateSwapsClassifedEconomicActivity	58000000	USD
CY2011Q4	ppl	Fair Value Interest Rate Swaps Classifed Economic Activity FairValueInterestRateSwapsClassifedEconomicActivity	60000000	USD
CY2012Q4	ppl	Total Exposure Hedged Foreign Currency Contracts Classifed As Economic Activity TotalExposureHedgedForeignCurrencyContractsClassifedAsEconomicActivity	1300000000	GBP
CY2012Q4	ppl	Total Exposure Hedged Foreign Currency Contracts Classifed As Economic Activity TotalExposureHedgedForeignCurrencyContractsClassifedAsEconomicActivity	2000000000	USD
CY2012Q4	us-gaap	Foreign Currency Derivative Instruments Not Designated As Hedging Instruments At Fair Value Net ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet	-42000000	USD
CY2011Q4	us-gaap	Foreign Currency Derivative Instruments Not Designated As Hedging Instruments At Fair Value Net ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet	11000000	USD
CY2012	ppl	Minimum Termination Date Net Investment Hedges Classified As Economic Activity MinimumTerminationDateNetInvestmentHedgesClassifiedAsEconomicActivity	January 2013
CY2012	ppl	Maximum Termination Date Net Investment Hedges Classified As Economic Activity MaximumTerminationDateNetInvestmentHedgesClassifiedAsEconomicActivity	February 2015
CY2012	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-52000000	USD
CY2011	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	10000000	USD
CY2010	ppl	Insignificant Or No Gains Losses On Foreign Currency Contracts Classified As Economic Activity InsignificantOrNoGainsLossesOnForeignCurrencyContractsClassifiedAsEconomicActivity	insignificant
CY2011	ppl	Gains Losses On Foreign Currency Contracts Classified As Economic Activity For Debt Or Commitments GainsLossesOnForeignCurrencyContractsClassifiedAsEconomicActivityForDebtOrCommitments	55000000	USD
CY2012Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1300000000	USD
CY2012Q4	ppl	Derivative Higher Remaining Maturity Range2 DerivativeHigherRemainingMaturityRange2	2028
CY2011	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Interest Rate Fair Value Hedge Net Pretax GainLossFromHedgedFirmCommitmentNotQualifyingAsInterestRateFairValueHedgeNetPretax	22000000	USD
CY2011	us-gaap	Gain Loss From Hedged Firm Commitment Not Qualifying As Interest Rate Fair Value Hedge Net GainLossFromHedgedFirmCommitmentNotQualifyingAsInterestRateFairValueHedgeNet	14000000	USD
CY2012Q4	us-gaap	Notional Amount Of Derivative Instruments Designated As Net Investment Hedges NotionalAmountOfDerivativeInstrumentsDesignatedAsNetInvestmentHedges	261000000	USD
CY2012Q4	us-gaap	Notional Amount Of Derivative Instruments Designated As Net Investment Hedges NotionalAmountOfDerivativeInstrumentsDesignatedAsNetInvestmentHedges	162000000	GBP
CY2012	ppl	Minimum Settlement Date Net Investment Hedges MinimumSettlementDateNetInvestmentHedges	May 2013
CY2012	ppl	Maximum Settlement Date Net Investment Hedges MaximumSettlementDateNetInvestmentHedges	December 2013
CY2012Q4	us-gaap	Net Investment Hedge Derivatives At Fair Value Net NetInvestmentHedgeDerivativesAtFairValueNet	-2000000	USD
CY2011Q4	us-gaap	Net Investment Hedge Derivatives At Fair Value Net NetInvestmentHedgeDerivativesAtFairValueNet	7000000	USD
CY2012Q4	us-gaap	Translation Adjustment For Net Investment Hedge Net Of Tax TranslationAdjustmentForNetInvestmentHedgeNetOfTax	14000000	USD
CY2011Q4	us-gaap	Translation Adjustment For Net Investment Hedge Net Of Tax TranslationAdjustmentForNetInvestmentHedgeNetOfTax	19000000	USD
CY2012	ppl	Gain Loss On Discontinuation Of Interest Rate Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Insignificant GainLossOnDiscontinuationOfInterestRateCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringInsignificant	no such reclassifications
CY2011	ppl	Gain Loss On Discontinuation Of Interest Rate Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Insignificant GainLossOnDiscontinuationOfInterestRateCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringInsignificant	no such reclassifications
CY2010	ppl	Proceeds From Sale Of Contract ProceedsFromSaleOfContract	249000000	USD
CY2010	ppl	Fair Value Of Normal Purchase Normal Sale Contracts Recorded Due To Monetization FairValueOfNormalPurchaseNormalSaleContractsRecordedDueToMonetization	160000000	USD
CY2010	ppl	Realized Pretax Gains Losses On Normal Purchase Normal Sale Contracts Recorded Due To Sale Of Contracts RealizedPretaxGainsLossesOnNormalPurchaseNormalSaleContractsRecordedDueToSaleOfContracts	144000000	USD
CY2010	ppl	Portion Of Fair Value Of Normal Purchase Normal Sale Contracts Recorded That Were Not Monetized PortionOfFairValueOfNormalPurchaseNormalSaleContractsRecordedThatWereNotMonetized	16000000	USD
CY2010	ppl	Pretax Loss Recorded On Monetization Of Certain Full Requirement Sales Contracts PretaxLossRecordedOnMonetizationOfCertainFullRequirementSalesContracts	-68000000	USD
CY2010	ppl	After Tax Loss Recorded On Monetization Of Certain Full Requirement Sales Contracts AfterTaxLossRecordedOnMonetizationOfCertainFullRequirementSalesContracts	-40000000	USD
CY2010	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	-173000000	USD
CY2010	ppl	Unrealized Pretax Gains Losses On Certain Full Requirement Sales Contracts Recorded Due To Monetization Fair Value Component UnrealizedPretaxGainsLossesOnCertainFullRequirementSalesContractsRecordedDueToMonetizationFairValueComponent	-39000000	USD
CY2012	us-gaap	Price Risk Cash Flow Hedge Ineffectiveness Is Immaterial PriceRiskCashFlowHedgeIneffectivenessIsImmaterial	insignificant
CY2012Q4	us-gaap	Notional Amount Of Nonderivative Instruments Designated As Net Investment Hedges NotionalAmountOfNonderivativeInstrumentsDesignatedAsNetInvestmentHedges	47000000	GBP
CY2010	us-gaap	Gain Loss On Interest Rate Cash Flow Hedge Ineffectiveness GainLossOnInterestRateCashFlowHedgeIneffectiveness	-9000000	USD
CY2012	us-gaap	Translation Adjustment For Net Investment Hedge Increase Decrease Net Of Tax TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax	-5000000	USD
CY2011	us-gaap	Translation Adjustment For Net Investment Hedge Increase Decrease Net Of Tax TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax	4000000	USD
CY2010	us-gaap	Translation Adjustment For Net Investment Hedge Increase Decrease Net Of Tax TranslationAdjustmentForNetInvestmentHedgeIncreaseDecreaseNetOfTax	4000000	USD
CY2012Q4	ppl	Foreign Currency Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months None Or Insignificant ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNoneOrInsignificant	Insignificant
CY2012	ppl	Gain Loss On Discontinuation Of Foreign Currency Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Insignificant GainLossOnDiscontinuationOfForeignCurrencyCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringInsignificant	no cash flow hedges were discontinued
CY2011	ppl	Gain Loss On Discontinuation Of Foreign Currency Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Insignificant GainLossOnDiscontinuationOfForeignCurrencyCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringInsignificant	no cash flow hedges were discontinued
CY2010	ppl	Gain Loss On Discontinuation Of Foreign Currency Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Insignificant GainLossOnDiscontinuationOfForeignCurrencyCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringInsignificant	no cash flow hedges were discontinued
CY2012	us-gaap	Ineffectiveness On Foreign Currency Fair Value Hedges Is Immaterial IneffectivenessOnForeignCurrencyFairValueHedgesIsImmaterial	no gains or losses
CY2012	ppl	Gain Loss From Hedged Being Excluded From Assessment Of Effectiveness Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedBeingExcludedFromAssessmentOfEffectivenessForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2011	ppl	Gain Loss From Hedged Being Excluded From Assessment Of Effectiveness Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedBeingExcludedFromAssessmentOfEffectivenessForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2011	us-gaap	Ineffectiveness On Foreign Currency Fair Value Hedges Is Immaterial IneffectivenessOnForeignCurrencyFairValueHedgesIsImmaterial	no gains or losses
CY2010	ppl	Gain Loss From Hedged Being Excluded From Assessment Of Effectiveness Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedBeingExcludedFromAssessmentOfEffectivenessForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2012	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2011	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2010	ppl	Gain Loss From Hedged Firm Commitment Not Qualifying As Foreign Currency Fair Value Hedge Insignificant GainLossFromHedgedFirmCommitmentNotQualifyingAsForeignCurrencyFairValueHedgeInsignificant	no gains or losses
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	300000000	USD
CY2012Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	238000000	USD
CY2011	ppl	Principal Debt Related To Discontinuance Fair Value Hedge PrincipalDebtRelatedToDiscontinuanceFairValueHedge	400000000	USD
CY2012Q4	ppl	Pretax Gain Loss Derivatives No Longer Designated As Hedging Instruments Recorded In Aoci PretaxGainLossDerivativesNoLongerDesignatedAsHedgingInstrumentsRecordedInAoci	300000000	USD
CY2011Q4	ppl	Pretax Gain Loss Derivatives No Longer Designated As Hedging Instruments Recorded In Aoci PretaxGainLossDerivativesNoLongerDesignatedAsHedgingInstrumentsRecordedInAoci	237000000	USD
CY2012Q4	ppl	Accumulated Other Comprehensive Income Loss Excluding Net Investment Hedges Net Of Tax AccumulatedOtherComprehensiveIncomeLossExcludingNetInvestmentHedgesNetOfTax	132000000	USD
CY2011Q4	ppl	Accumulated Other Comprehensive Income Loss Excluding Net Investment Hedges Net Of Tax AccumulatedOtherComprehensiveIncomeLossExcludingNetInvestmentHedgesNetOfTax	527000000	USD
CY2010Q4	ppl	Accumulated Other Comprehensive Income Loss Excluding Net Investment Hedges Net Of Tax AccumulatedOtherComprehensiveIncomeLossExcludingNetInvestmentHedgesNetOfTax	695000000	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	39000000	USD
CY2012Q4	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	202000000	USD
CY2012Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	219000000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	-14000000	USD
CY2011	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2391000000	USD
CY2012	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	58000000	USD
CY2011	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-38000000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	1761000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	996000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	302000000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1159000000	USD
CY2011Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	215000000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	9000000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	14000000	USD
CY2012	us-gaap	Asset Retirement Obligation Foreign Currency Translation AssetRetirementObligationForeignCurrencyTranslation	1000000	USD
CY2012Q4	ppl	Total Other Intangible Assets Finite Infinite TotalOtherIntangibleAssetsFiniteInfinite	1234000000	USD
CY2011Q4	ppl	Total Other Intangible Assets Finite Infinite TotalOtherIntangibleAssetsFiniteInfinite	1374000000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	712000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	640000000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	-36000000	USD
CY2012	ppl	Obligations Assumed In Acquisition ObligationsAssumedInAcquisition		USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	31000000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	22000000	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	-33000000	USD
CY2011	ppl	Obligations Assumed In Acquisition ObligationsAssumedInAcquisition	15000000	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	5000000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	18000000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	497000000	USD
CY2010Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	448000000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	552000000	USD
CY2011	us-gaap	Asset Retirement Obligation Foreign Currency Translation AssetRetirementObligationForeignCurrencyTranslation		USD
CY2012Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	316000000	USD
CY2011Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	292000000	USD
CY2010Q4	ppl	Pollution Control Revenue Bonds Principal Amount PollutionControlRevenueBondsPrincipalAmount	163000000	USD
CY2011Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	479000000	USD
CY2012Q3	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	29.98
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.61
CY2011Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	187000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	494000000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.61
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	239000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	2000000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	731000000	USD
CY2011Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	664000000	USD
CY2011Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	2000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	12000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	79000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	62000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	78000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	231000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	12000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	83000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	68000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	85000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	248000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	28000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	16000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	13000000	USD
CY2010	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	5000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	21000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	29000000	USD
CY2010	ppl	Proceeds From Sale Of Other Investment ProceedsFromSaleOfOtherInvestment		USD
CY2011	ppl	Proceeds From Sale Of Other Investment ProceedsFromSaleOfOtherInvestment	163000000	USD
CY2012	ppl	Proceeds From Sale Of Other Investment ProceedsFromSaleOfOtherInvestment	5000000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax		USD
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2012Q1	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	27.29
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.93
CY2012Q3	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	27.72
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2012	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0px;">24</font><font style="font-family:Arial;font-size:10pt;font-weight:bold;">. </font><font style="font-family:Arial;font-size:10pt;font-weight:bold;"> </font><font style="font-family:Arial;font-size:10pt;font-weight:bold;">New Accounting Guidance Pending Adoption</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0px;">(</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">PPL</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">, </font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">PPL</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;"> Energy Supply, </font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;">PPL</font><font style="font-family:Times New Roman;font-size:10pt;font-style:italic;"> Electric, LKE, LG&E and KU)</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Improving Disclosures about Offsetting Balance Sheet Items</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Effective </font><font style="font-family:Times New Roman;font-size:10pt;">January 1, 2013</font><font style="font-family:Times New Roman;font-size:10pt;">, </font><font style="font-family:Times New Roman;font-size:10pt;">the Registrants</font><font style="font-family:Times New Roman;font-size:10pt;"> will retrospectively adopt accounting guidance issued to enhance disclosures about derivative instruments that either (1) offset </font><font style="font-family:Times New Roman;font-size:10pt;">on the balance sheet </font><font style="font-family:Times New Roman;font-size:10pt;">or (2) are subject to an enforceable master netting arrangement or similar agreement, irrespective of whether they are offset </font><font style="font-family:Times New Roman;font-size:10pt;">on the balance sheet</font><font style="font-family:Times New Roman;font-size:10pt;">.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Upon adoption, the enhanced disclosure requirements are not expected to have a significant impact on the Registrants.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Testing Indefinite-Lived Intangible Assets for Impairment</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Effective </font><font style="font-family:Times New Roman;font-size:10pt;">January 1, 2013</font><font style="font-family:Times New Roman;font-size:10pt;">, </font><font style="font-family:Times New Roman;font-size:10pt;">the Registrants</font><font style="font-family:Times New Roman;font-size:10pt;"> will </font><font style="font-family:Times New Roman;font-size:10pt;">prospectively adopt accounting guidance that allows an entity to elect the option to first make a qualitative evaluation about the likelihood of an impairment of an indefinite-lived intangible asset. If, based on this assessment, the entity determines that it is more likely than not that the fair value of the indefinite-lived intangible asset exceeds the carrying amount, the fair value of that asset does not need to be calculated. If the entity concludes otherwise, a quantitative impairment test must be performed by determining the fair value of the asset and comparing it with the carrying value. The entity would record an impairment charge, if necessary.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Upon adoption, the </font><font style="font-family:Times New Roman;font-size:10pt;">guidance is </font><font style="font-family:Times New Roman;font-size:10pt;">not expected to have a significant impact on </font><font style="font-family:Times New Roman;font-size:10pt;">the Registrants</font><font style="font-family:Times New Roman;font-size:10pt;">. </font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Arial;font-size:10pt;text-decoration:underline;margin-left:0px;">Reporting Amounts Reclassified Out of </font><font style="font-family:Arial;font-size:10pt;text-decoration:underline;">AOCI</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Effective January 1, 2013, the Registrants will prospectively adopt accounting guidance issued to improve the reporting of reclassifications out of </font><font style="font-family:Times New Roman;font-size:10pt;">AOCI</font><font style="font-family:Times New Roman;font-size:10pt;">. </font><font style="font-family:Times New Roman;font-size:10pt;"> The Registrants will be required to </font><font style="font-family:Times New Roman;font-size:10pt;">provide information about the effects on net income of sign</font><font style="font-family:Times New Roman;font-size:10pt;">i</font><font style="font-family:Times New Roman;font-size:10pt;">ficant</font><font style="font-family:Times New Roman;font-size:10pt;"> </font><font style="font-family:Times New Roman;font-size:10pt;">amounts reclassified out of </font><font style="font-family:Times New Roman;font-size:10pt;">AOCI</font><font style="font-family:Times New Roman;font-size:10pt;"> by their respective </font><font style="font-family:Times New Roman;font-size:10pt;">statement of </font><font style="font-family:Times New Roman;font-size:10pt;">income line item, if the item is required to be reclassified to net income in its entirety. For items not reclassified to net income in their entirety, the Registrants </font><font style="font-family:Times New Roman;font-size:10pt;">will be required to reference</font><font style="font-family:Times New Roman;font-size:10pt;"> other disclosures that provide details on these amounts.</font></p><p style='margin-top:0pt; margin-bottom:0pt'> </p><p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Upon adoption, the enhanced disclosure requirements are not expected to have a significant impact on the Registrants. </font><font style="font-family:Times New Roman;font-size:10pt;"> </font></p>
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	541000000	USD
CY2012Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	4112000000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.93
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1051000000	USD
CY2012Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.360
CY2012Q1	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	29.85
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	545000000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	545000000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.47
CY2012Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.360
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	355000000	USD
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2012Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2549000000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	271000000	USD
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	572000000	USD
CY2012Q2	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	28.44
CY2011Q2	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2489000000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	664000000	USD
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1000000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax		USD
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2012Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2403000000	USD
CY2011Q1	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	24.10
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-6000000	USD
CY2012Q2	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	26.68
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	277000000	USD
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.47
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	355000000	USD
CY2012Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.360
CY2012Q3	us-gaap	Profit Loss ProfitLoss	355000000	USD
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2012Q4	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	30.18
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	359000000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.61
CY2012Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.360
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	822000000	USD
CY2012Q4	us-gaap	Profit Loss ProfitLoss	360000000	USD
CY2012Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	3222000000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	360000000	USD
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.60
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax		USD
CY2012Q4	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	27.74
CY2011Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	402000000	USD
CY2011Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.350
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	805000000	USD
CY2011Q1	us-gaap	Profit Loss ProfitLoss	405000000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.82
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.82
CY2011Q1	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	26.98
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	401000000	USD
CY2011Q1	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	2910000000	USD
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	3000000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.35
CY2011Q2	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	25.23
CY2011Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.350
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	196000000	USD
CY2011Q2	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	28.38
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	595000000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	201000000	USD
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2011Q2	us-gaap	Profit Loss ProfitLoss	200000000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.35
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	767000000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	449000000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	454000000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	449000000	USD
CY2011Q4	us-gaap	Profit Loss ProfitLoss	458000000	USD
CY2011Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.350
CY2011Q4	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	4218000000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.78
CY2011Q3	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	29.61
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.76
CY2011Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.350
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax		USD
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.76
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	444000000	USD
CY2011Q3	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	25.00
CY2011Q3	us-gaap	Regulated And Unregulated Operating Revenue RegulatedAndUnregulatedOperatingRevenue	3120000000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	458000000	USD
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2011Q4	ppl	Lowest Price Per Share Of Stock Sold During Quarter LowestPricePerShareOfStockSoldDuringQuarter	27.00
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	934000000	USD
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax		USD
CY2011Q4	ppl	Highest Price Per Share Of Stock Sold During Quarter HighestPricePerShareOfStockSoldDuringQuarter	30.27
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.78
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-85000000	USD
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000922224
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	582846910	shares
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2010	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	383000000	USD
CY2012Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	572000000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	21000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10498000000	USD
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Entity Registrant Name EntityRegistrantName	PPL Corp
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	691000000	USD
CY2011	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	9636000000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	325000000	USD

Files In Submission

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0000922224-13-000025-index-headers.html	Edgar Link	pending
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Financial_Report.xls	Edgar Link	pending
form10k.htm	Edgar Link	pending
ppl-20121231.xml	Edgar Link	completed
ppl-20121231.xsd	Edgar Link	pending
ppl-20121231_cal.xml	Edgar Link	unprocessable
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$PPL
PPL Corp Stock $ppl

2012 Form 10-K Financial Statement

#000092222413000025 Filed on February 28, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PPL PPL Corp Stock $ppl

2012 Form 10-K Financial Statement

#000092222413000025 Filed on February 28, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PPL
PPL Corp Stock $ppl