$XEL
XCEL ENERGY INC Stock $xel

$xel Overview Financials Valuation SEC Filings Company Website

2013 Q4 Form 10-K Financial Statement

#000007290315000011 Filed on February 20, 2015

Income Statement

Concept	2013 Q4	2013 Q3	2013 Q2
Revenue	$2.731B	$2.822B	$2.579B
YoY Change	7.04%	3.6%	13.38%
Cost Of Revenue	$389.3M	$82.40M	$196.6M
YoY Change	17.22%	44.56%	105.43%
Gross Profit	$2.342B	$2.740B	$2.382B
YoY Change	5.52%	2.72%	9.33%
Gross Profit Margin	85.74%	97.08%	92.38%
Selling, General & Admin	$68.40M	$67.80M	$60.40M
YoY Change	-1.3%	-1.6%	3.07%
% of Gross Profit	2.92%	2.47%	2.54%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$282.8M	$260.0M	$304.1M
YoY Change	19.78%	6.78%	31.65%
% of Gross Profit	12.08%	9.49%	12.76%
Operating Expenses	$2.016B	$2.075B	$1.980B
YoY Change	5.96%	6.57%	11.66%
Operating Profit	$325.6M	$665.1M	$402.2M
YoY Change	2.9%	-7.68%	-0.85%
Interest Expense	-$118.8M	$144.5M	$146.9M
YoY Change	0.93%	-5.97%	-3.34%
% of Operating Profit	-36.49%	21.73%	36.51%
Other Income/Expense, Net	$16.70M	-$404.0K	$413.0K
YoY Change	43.97%	-182.79%	-43.27%
Pretax Income	$223.5M	$558.1M	$295.8M
YoY Change	6.28%	-7.14%	3.82%
Income Tax	$73.30M	$193.3M	$98.89M
% Of Pretax Income	32.8%	34.64%	33.44%
Net Earnings	$150.1M	$364.8M	$196.9M
YoY Change	7.05%	-8.38%	7.54%
Net Earnings / Revenue	5.49%	12.92%	7.63%
Basic Earnings Per Share	$0.30	$0.73	$0.40
Diluted Earnings Per Share	$0.30	$0.73	$0.40
COMMON SHARES
Basic Shares Outstanding	497.6M shares	498.1M shares	497.7M shares
Diluted Shares Outstanding		498.6M shares	498.0M shares

Balance Sheet

Concept	2013 Q4	2013 Q3	2013 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$107.0M	$102.0M	$59.00M
YoY Change	30.49%	-86.35%	-7.81%
Cash & Equivalents	$107.1M	$101.8M	$58.82M
Short-Term Investments
Other Short-Term Assets	$1.790B	$1.628B	$1.545B
YoY Change	38.87%	19.97%	12.12%
Inventory	$576.5M	$604.6M	$494.9M
Prepaid Expenses
Receivables	$744.2M	$786.9M	$719.1M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.218B	$3.121B	$2.818B
YoY Change	22.59%	-7.42%	10.09%
LONG-TERM ASSETS
Property, Plant & Equipment	$26.12B	$25.34B	$24.81B
YoY Change	9.71%	8.3%	7.66%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$87.10M	$87.80M	$88.70M
YoY Change	-4.5%
Other Assets	$217.2M	$178.2M	$184.2M
YoY Change	8.62%	-95.84%	-95.63%
Total Long-Term Assets	$30.69B	$30.01B	$29.45B
YoY Change	7.62%	8.38%	8.03%
TOTAL ASSETS
Total Short-Term Assets	$3.218B	$3.121B	$2.818B
Total Long-Term Assets	$30.69B	$30.01B	$29.45B
Total Assets	$33.91B	$33.13B	$32.27B
YoY Change	8.88%	6.66%	8.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.261B	$965.6M	$998.6M
YoY Change	31.5%	9.1%	14.65%
Accrued Expenses	$159.0M	$135.0M	$157.0M
YoY Change	-1.85%	-16.15%	-11.3%
Deferred Revenue
YoY Change
Short-Term Debt	$759.0M	$302.0M	$354.0M
YoY Change	26.08%	-0.66%	-26.4%
Long-Term Debt Due	$281.0M	$281.0M	$282.0M
YoY Change	8.91%	-67.29%	-78.51%
Total Short-Term Liabilities	$3.654B	$2.839B	$2.697B
YoY Change	24.43%	-10.18%	-29.61%
LONG-TERM LIABILITIES
Long-Term Debt	$10.91B	$10.91B	$10.82B
YoY Change	7.56%	8.0%	24.24%
Other Long-Term Liabilities	$237.2M	$239.5M	$245.4M
YoY Change	3.49%	-94.44%	-94.3%
Total Long-Term Liabilities	$237.2M	$239.5M	$245.4M
YoY Change	3.49%	-98.34%	-98.11%
TOTAL LIABILITIES
Total Short-Term Liabilities	$3.654B	$2.839B	$2.697B
Total Long-Term Liabilities	$237.2M	$239.5M	$245.4M
Total Liabilities	$3.892B	$3.079B	$2.942B
YoY Change	22.91%	-86.14%	-86.15%
SHAREHOLDERS EQUITY
Retained Earnings	$2.808B	$2.797B	$2.573B
YoY Change	16.33%
Common Stock	$6.864B	$6.860B	$6.839B
YoY Change	4.43%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$9.566B	$9.547B	$9.300B
YoY Change
Total Liabilities & Shareholders Equity	$33.91B	$33.13B	$32.27B
YoY Change	8.88%	6.66%	8.2%

Cashflow Statement

Concept	2013 Q4	2013 Q3	2013 Q2
OPERATING ACTIVITIES
Net Income	$150.1M	$364.8M	$196.9M
YoY Change	7.05%	-8.38%	7.54%
Depreciation, Depletion And Amortization	$282.8M	$260.0M	$304.1M
YoY Change	19.78%	6.78%	31.65%
Cash From Operating Activities	$581.1M	$928.7M	$431.9M
YoY Change	34.23%	31.43%	11.37%
INVESTING ACTIVITIES
Capital Expenditures	-$941.1M	-$857.4M	-$844.5M
YoY Change	23.12%	22.1%	39.26%
Acquisitions
YoY Change
Other Investing Activities	$38.50M	$58.60M	$45.80M
YoY Change	-6.33%	19.59%	-6.53%
Cash From Investing Activities	-$902.6M	-$798.8M	-$798.7M
YoY Change	24.79%	22.29%	43.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	326.8M	-86.90M	312.7M
YoY Change	-187.26%	-113.78%	134.58%
NET CHANGE
Cash From Operating Activities	581.1M	928.7M	431.9M
Cash From Investing Activities	-902.6M	-798.8M	-798.7M
Cash From Financing Activities	326.8M	-86.90M	312.7M
Net Change In Cash	5.300M	43.00M	-54.10M
YoY Change	-100.8%	-93.71%	49.04%
FREE CASH FLOW
Cash From Operating Activities	$581.1M	$928.7M	$431.9M
Capital Expenditures	-$941.1M	-$857.4M	-$844.5M
Free Cash Flow	$1.522B	$1.786B	$1.276B
YoY Change	27.14%	26.78%	28.38%

Facts In Submission

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CY2014	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2014	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014	dei	Document Period End Date DocumentPeriodEndDate	2014-12-31
CY2014	dei	Document Type DocumentType	10-K
CY2014	dei	Entity Central Index Key EntityCentralIndexKey	0000072903
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CY2014	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2014	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2014	dei	Entity Registrant Name EntityRegistrantName	XCEL ENERGY INC
CY2014	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2014	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2014	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	22986000	USD
CY2014	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	616934000	USD
CY2012	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.028
CY2013	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.029
CY2014	xel	Depreciation Expense Expressed As Percentage Of Average Depreciable Property DepreciationExpenseExpressedAsPercentageOfAverageDepreciableProperty	0.027
CY2014Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	85723000	USD
CY2013Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1627026000	USD
CY2014Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1703921000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	366409000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	439085000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	505236000	USD
CY2013Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	83000000	USD
CY2014Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	85000000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	508094000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	515062000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	569378000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	50741000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	80907000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	84787000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-4989844000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-5606778000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	341202000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	246210000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	-5331046000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	-5852988000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1148877000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1251426000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	532774000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	552274000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	81202000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	83199000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3263000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3402000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6138721000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	6858204000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	254639000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	300251000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5562446000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	6257191000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	321636000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	300762000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	28000000	USD
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	30300000	USD
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	32400000	USD
CY2012	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	943702000	USD
CY2013	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1001843000	USD
CY2014	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1036515000	USD
CY2013Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	200000	USD
CY2014Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	0	USD
CY2013Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	91707000	USD
CY2013Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	23382000	USD
CY2014Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	21632000	USD
CY2013Q4	us-gaap	Derivative Instruments And Hedges Liabilities Noncurrent DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent	209224000	USD
CY2014Q4	us-gaap	Derivative Instruments And Hedges Liabilities Noncurrent DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent	183936000	USD
CY2013Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	84842000	USD
CY2014Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	53775000	USD
CY2013Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	4200000	USD
CY2014Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	6600000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	523969000	USD
CY2013	us-gaap	Dividends Common Stock DividendsCommonStock	554067000	USD
CY2014	us-gaap	Dividends Common Stock DividendsCommonStock	608331000	USD
CY2013Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	139432000	USD
CY2014Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	151720000	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.86
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.91
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.73
CY2014Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.03
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.85
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.40
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.30
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.91
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2014Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.03
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.332
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.338
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.339
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	-0.012
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	0.000
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	0.000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.009
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.040
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.041
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2014	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.040
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.022
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.026
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.026
CY2012	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	8517296000	USD
CY2013	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	9034045000	USD
CY2014	us-gaap	Electric Domestic Regulated Revenue ElectricDomesticRegulatedRevenue	9465890000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4270000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1698000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	1887000	USD
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	22100000	USD
CY2014Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	27800000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	10513000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	9571000	USD
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	12557000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	33470000	USD
CY2013	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	36416000	USD
CY2014	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	36707000	USD
CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	87100000	USD
CY2014Q4	us-gaap	Equity Method Investments EquityMethodInvestments	83100000	USD
CY2013	us-gaap	Fair Value Assumptions Risk Free Interest Rate FairValueAssumptionsRiskFreeInterestRate	0.0419
CY2014	us-gaap	Fair Value Assumptions Risk Free Interest Rate FairValueAssumptionsRiskFreeInterestRate	0.0282
CY2012Q4	us-gaap	Fair Value Hedges At Fair Value Net FairValueHedgesAtFairValueNet	0	USD
CY2013Q4	us-gaap	Fair Value Hedges At Fair Value Net FairValueHedgesAtFairValueNet	0	USD
CY2014Q4	us-gaap	Fair Value Hedges At Fair Value Net FairValueHedgesAtFairValueNet	0	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	63464000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	55827000	USD
CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	30166000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	99891000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	18622000	USD
CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	10080000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	32276000	USD
CY2014	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	USD
CY2011Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	130763000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	104600000	USD
CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	120064000	USD
CY2014Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	165486000	USD
CY2012	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	0	USD
CY2013	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	0	USD
CY2014	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	0	USD
CY2014	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	41262000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2013	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	13661000	USD
CY2014	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2012	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	1537374000	USD
CY2013	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	1804679000	USD
CY2014	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	2142738000	USD
CY2014	us-gaap	General Insurance Expense GeneralInsuranceExpense	6923000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1355432000	USD
CY2012	us-gaap	General Insurance Expense GeneralInsuranceExpense	7365000	USD
CY2013	us-gaap	General Insurance Expense GeneralInsuranceExpense	8292000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1432210000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1545121000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	29971000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	30020000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	30151000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	450203000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	483976000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	523815000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	9570000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-17188000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4542000	USD
CY2012	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	197236000	USD
CY2013	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	108911000	USD
CY2014	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	125146000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-100327000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	132441000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-53242000	USD
CY2012	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-183922000	USD
CY2013	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-156369000	USD
CY2014	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-101457000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-82658000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	43588000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	20558000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	30737000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	18071000	USD
CY2014	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	111300000	USD
CY2012	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	42914000	USD
CY2013	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	126555000	USD
CY2014	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	137147000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	33151000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	9998000	USD
CY2014	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-44364000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-3905000	USD
CY2013	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	17925000	USD
CY2014	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-15674000	USD
CY2012	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-5866000	USD
CY2013	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-141325000	USD
CY2014	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-195823000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-95287000	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2012	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	-25377000	USD
CY2013	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	23867000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	535000	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	459000	shares
CY2014	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	270000	shares
CY2012	us-gaap	Interest And Debt Expense InterestAndDebtExpense	566237000	USD
CY2013	us-gaap	Interest And Debt Expense InterestAndDebtExpense	536020000	USD
CY2014	us-gaap	Interest And Debt Expense InterestAndDebtExpense	528206000	USD
CY2012	us-gaap	Interest And Other Income InterestAndOtherIncome	10327000	USD
CY2013	us-gaap	Interest And Other Income InterestAndOtherIncome	8343000	USD
CY2014	us-gaap	Interest And Other Income InterestAndOtherIncome	7353000	USD
CY2012	us-gaap	Interest Expense InterestExpense	601552000	USD
CY2013	us-gaap	Interest Expense InterestExpense	575199000	USD
CY2014	us-gaap	Interest Expense InterestExpense	566608000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	563517000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	514911000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	512602000	USD
CY2013Q4	us-gaap	Interest Payable Current InterestPayableCurrent	159372000	USD
CY2014Q4	us-gaap	Interest Payable Current InterestPayableCurrent	158536000	USD
CY2013Q4	us-gaap	Inventory Net InventoryNet	576538000	USD
CY2014Q4	us-gaap	Inventory Net InventoryNet	597183000	USD
CY2012	us-gaap	Investment Tax Credit InvestmentTaxCredit	-6610000	USD
CY2013	us-gaap	Investment Tax Credit InvestmentTaxCredit	-5753000	USD
CY2014	us-gaap	Investment Tax Credit InvestmentTaxCredit	-5543000	USD
CY2013Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	1755990000	USD
CY2014Q4	us-gaap	Investments And Other Noncurrent Assets InvestmentsAndOtherNoncurrentAssets	1832640000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	33907490000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	36957884000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3654498000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4064583000	USD
CY2013Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	9776288000	USD
CY2014Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	11179185000	USD
CY2013Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	10910754000	USD
CY2014Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	11499634000	USD
CY2013Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	280763000	USD
CY2014Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	257726000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	258000000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	406000000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	1206000000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	388000000	USD
CY2014Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	656000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	349825000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	654169000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	441523000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2332942000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3213384000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3117251000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2004756000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2584036000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2648192000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	905229000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	236570000	USD
CY2013Q2	us-gaap	Net Income Loss NetIncomeLoss	196857000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	364752000	USD
CY2013Q4	us-gaap	Net Income Loss NetIncomeLoss	150055000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	948234000	USD
CY2014Q1	us-gaap	Net Income Loss NetIncomeLoss	261221000	USD
CY2014Q2	us-gaap	Net Income Loss NetIncomeLoss	195164000	USD
CY2014Q3	us-gaap	Net Income Loss NetIncomeLoss	368582000	USD
CY2014Q4	us-gaap	Net Income Loss NetIncomeLoss	196339000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	1021306000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	905229000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	948234000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1021306000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	905229000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	948234000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1021306000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	1822683000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	454624000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	402236000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	665113000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	325582000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	1847555000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	493992000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	397208000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	665680000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	391250000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	1948130000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	254500000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	235100000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	228600000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	228400000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	239000000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1918000000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	217241000	USD
CY2014Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	175957000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7005000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	1408000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-7517000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-4898000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	1746000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-4687000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3694000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3306000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	3495000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	2567000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	4151000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	2159000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	1596000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-7647000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-15503000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	1488000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	2125000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-9906000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	2558000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	1390000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6378000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1864000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-18618000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6378000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1864000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	3311000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-4714000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4022000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2331000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	5897000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-2528000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-3697000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1476000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2288000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-2687000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-2541000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1493000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	12102000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-8572000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1117000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-19200000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	12000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-163000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-12593000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	17000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-103000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	196000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	176000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	33000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	135000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	117000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	21000	USD
CY2012	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	29067000	USD
CY2013	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	33323000	USD
CY2014	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	34352000	USD
CY2013Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	377776000	USD
CY2014Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	475119000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	237217000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	264653000	USD
CY2013Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	41900000	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	231767000	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	180798000	USD
CY2014Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	45600000	USD
CY2012	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	270000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1790131000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1431895000	USD
CY2013	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	104000	USD
CY2014	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	0	USD
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3483000	USD
CY2013	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3025000	USD
CY2014	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	4866000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6175000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2972000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5296000	USD
CY2012	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	73553000	USD
CY2013	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	76198000	USD
CY2014	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	77507000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2766000	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4766000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3695000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18529000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2012	us-gaap	Payments Of Dividends PaymentsOfDividends	486757000	USD
CY2013	us-gaap	Payments Of Dividends PaymentsOfDividends	514042000	USD
CY2014	us-gaap	Payments Of Dividends PaymentsOfDividends	561411000	USD
CY2012	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	980000	USD
CY2013	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	7504000	USD
CY2014	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2376000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2570209000	USD
CY2013	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3395325000	USD
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	3199791000	USD
CY2012	us-gaap	Payments To Invest In Decommissioning Fund PaymentsToInvestInDecommissioningFund	1102025000	USD
CY2013	us-gaap	Payments To Invest In Decommissioning Fund PaymentsToInvestInDecommissioningFund	1481881000	USD
CY2014	us-gaap	Payments To Invest In Decommissioning Fund PaymentsToInvestInDecommissioningFund	595569000	USD
CY2013Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	769222000	USD
CY2014Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	936907000	USD
CY2013Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	191698000	USD
CY2014Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	171112000	USD
CY2013Q4	us-gaap	Prepaid Taxes PrepaidTaxes	60560000	USD
CY2014Q4	us-gaap	Prepaid Taxes PrepaidTaxes	185488000	USD
CY2014Q4	us-gaap	Price Risk Cash Flow Hedge Unrealized Gain Loss To Be Reclassified During Next12 Months PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months	100000	USD
CY2012	us-gaap	Proceeds From Decommissioning Fund ProceedsFromDecommissioningFund	1087076000	USD
CY2013	us-gaap	Proceeds From Decommissioning Fund ProceedsFromDecommissioningFund	1461291000	USD
CY2014	us-gaap	Proceeds From Decommissioning Fund ProceedsFromDecommissioningFund	588430000	USD
CY2012	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	97835000	USD
CY2013	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	90000000	USD
CY2014	us-gaap	Proceeds From Insurance Settlement Investing Activities ProceedsFromInsuranceSettlementInvestingActivities	6000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	8050000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	837584000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	383000000	USD
CY2013	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	157000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	260500000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2013	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	37118000	USD
CY2014	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	38386353000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	41535142000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	26122159000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28756916000	USD
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	33808000	USD
CY2013	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	37627000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	42765000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	62840000	USD
CY2013	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	87683000	USD
CY2014	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	89750000	USD
CY2012	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-35315000	USD
CY2013	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-39179000	USD
CY2014	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	-38402000	USD
CY2013Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	576538000	USD
CY2014Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	597183000	USD
CY2013	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-4782000	USD
CY2014	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-5783000	USD
CY2013Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	417801000	USD
CY2014Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	444058000	USD
CY2013Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2509218000	USD
CY2014Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	2774216000	USD
CY2013Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	274769000	USD
CY2014Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	410729000	USD
CY2013Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1059395000	USD
CY2014Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	1163429000	USD
CY2013Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	306000000	USD
CY2014Q4	us-gaap	Remaining Amounts Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided RemainingAmountsOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided	323000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1302763000	USD
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	652451000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	275948000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2807983000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3220958000	USD
CY2012	us-gaap	Revenues Revenues	10128223000	USD
CY2013Q1	us-gaap	Revenues Revenues	2782849000	USD
CY2013Q2	us-gaap	Revenues Revenues	2578913000	USD
CY2013Q3	us-gaap	Revenues Revenues	2822338000	USD
CY2013Q4	us-gaap	Revenues Revenues	2730822000	USD
CY2013	us-gaap	Revenues Revenues	10914922000	USD
CY2014Q1	us-gaap	Revenues Revenues	3202604000	USD
CY2014Q2	us-gaap	Revenues Revenues	2685096000	USD
CY2014Q3	us-gaap	Revenues Revenues	2869807000	USD
CY2014Q4	us-gaap	Revenues Revenues	2928628000	USD
CY2014	us-gaap	Revenues Revenues	11686135000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	26970000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	24613000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	32189000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	99000	shares
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	28.36
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	591000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	774000	shares
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	588000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	27.35
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	27.65
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	29.90
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1312000	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	1322000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	27.53
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	28.63
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Remaining Contractual Terms ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms	P1Y7M
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	100000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	600000	shares
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	546000	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	1200000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	16800000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	19600000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	27.34
CY2013Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	759000000	USD
CY2014Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1019500000	USD
CY2014Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Upper Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	10000000	USD
CY2012	us-gaap	Stock Issued1 StockIssued1	67723000	USD
CY2013	us-gaap	Stock Issued1 StockIssued1	56950000	USD
CY2014	us-gaap	Stock Issued1 StockIssued1	62078000	USD
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	33634000	USD
CY2013	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	262701000	USD
CY2014	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	204549000	USD
CY2012Q1	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	700000	shares
CY2012Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	700000	shares
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	18529000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	9565950000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	10214482000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8482198000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	8874077000	USD
CY2012	xel	Adjustments To Additional Paid In Capital Purchase Of Common Stock For Settlement Of Equity Awards AdjustmentsToAdditionalPaidInCapitalPurchaseOfCommonStockForSettlementOfEquityAwards	23307000	USD
CY2013Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	378766000	USD
CY2014Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	396615000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34700000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9565950000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	10214482000	USD
CY2012	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-15000000	USD
CY2013	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-12000000	USD
CY2014	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	-17000000	USD
CY2012	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	408924000	USD
CY2013	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	420500000	USD
CY2014	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	465836000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	34500000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	41200000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	66500000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	5700000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	400000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	9300000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4800000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	6000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	24800000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	9600000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5200000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	15100000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	28700000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	9600000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	21600000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2013	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2014	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1800000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	12900000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	16200000	USD
CY2012	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	926053000	USD
CY2013	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	977863000	USD
CY2014	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	1019045000	USD
CY2012	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2176095000	USD
CY2013	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2273532000	USD
CY2014	us-gaap	Utilities Operating Expense Maintenance Operations And Other Costs And Expenses UtilitiesOperatingExpenseMaintenanceOperationsAndOtherCostsAndExpenses	2334379000	USD
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	488434000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	496532000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	504117000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	487899000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	496073000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	503847000	shares
CY2013Q4	xel	Accrued Unbilled Revenues AccruedUnbilledRevenues	687230000	USD
CY2014Q4	xel	Accrued Unbilled Revenues AccruedUnbilledRevenues	728492000	USD
CY2013Q4	xel	Additional Cash Dividends On Common Stock Which Could Have Been Paid Per First Mortgage Indenture AdditionalCashDividendsOnCommonStockWhichCouldHaveBeenPaidPerFirstMortgageIndenture	1400000000	USD
CY2014Q4	xel	Additional Cash Dividends On Common Stock Which Could Have Been Paid Per First Mortgage Indenture AdditionalCashDividendsOnCommonStockWhichCouldHaveBeenPaidPerFirstMortgageIndenture	1600000000	USD
CY2012	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-63862000	USD
CY2013	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-64420000	USD
CY2014	xel	Amortization And Adjustments To Deferred Income Taxes On Income Tax Regulatory Assets And Liabilities AmortizationAndAdjustmentsToDeferredIncomeTaxesOnIncomeTaxRegulatoryAssetsAndLiabilities	-48674000	USD
CY2014	xel	Approvedannualaccrualfordecommissioningcosts Approvedannualaccrualfordecommissioningcosts	14200000	USD
CY2014	xel	Assumed Annual Escalation Rate During Independent Fuel Storage Installation And Site Restoration Portion Of Decommissioning AssumedAnnualEscalationRateDuringIndependentFuelStorageInstallationAndSiteRestorationPortionOfDecommissioning	0.0263
CY2014	xel	Assumed Annual Escalation Rate During Operations And Radiological Portion Of Decommissioning AssumedAnnualEscalationRateDuringOperationsAndRadiologicalPortionOfDecommissioning	0.0363
CY2012Q1	xel	Average Purchase Price Per Share Of Common Stock Repurchased AveragePurchasePricePerShareOfCommonStockRepurchased	26.42
CY2013Q4	xel	Balance In Internally Funded Decommissioning Account BalanceInInternallyFundedDecommissioningAccount	0	USD
CY2013Q4	xel	Bonus Depreciation Rate BonusDepreciationRate	0.5
CY2014Q4	xel	Bonus Depreciation Rate BonusDepreciationRate	0.5
CY2013Q4	xel	Collateral Already Posted Adequate Assurance Clauses Aggregate Fair Value CollateralAlreadyPostedAdequateAssuranceClausesAggregateFairValue	0	USD
CY2014Q4	xel	Collateral Already Posted Adequate Assurance Clauses Aggregate Fair Value CollateralAlreadyPostedAdequateAssuranceClausesAggregateFairValue	0	USD
CY2012	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	260527000	USD
CY2013	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	260726000	USD
CY2014	xel	Conservation And Demand Side Management Program Expenses ConservationAndDemandSideManagementProgramExpenses	301772000	USD
CY2014Q4	xel	Cumulative Fuel Disposal Assessments Paid To Doe CumulativeFuelDisposalAssessmentsPaidToDoe	452100000	USD
CY2012	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	-1704000	USD
CY2013	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	13162000	USD
CY2014	xel	Current Change In Unrecognized Tax Expense Benefit CurrentChangeInUnrecognizedTaxExpenseBenefit	23915000	USD
CY2013Q4	xel	Current Top Tax Rate For Dividends CurrentTopTaxRateForDividends	0.15
CY2012	xel	Doe Fuel Disposal Assessments Included In Fuel Expense DOEFuelDisposalAssessmentsIncludedInFuelExpense	12000000	USD
CY2013	xel	Doe Fuel Disposal Assessments Included In Fuel Expense DOEFuelDisposalAssessmentsIncludedInFuelExpense	10000000	USD
CY2014	xel	Doe Fuel Disposal Assessments Included In Fuel Expense DOEFuelDisposalAssessmentsIncludedInFuelExpense	5000000	USD
CY2012	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	2013000	USD
CY2013	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	-4930000	USD
CY2014	xel	Deferred Change In Unrecognized Tax Expense Benefit DeferredChangeInUnrecognizedTaxExpenseBenefit	-20645000	USD
CY2012	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	-6000	USD
CY2013	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	1000	USD
CY2014	xel	Deferred Income Tax Expense Benefit Other DeferredIncomeTaxExpenseBenefitOther	1000	USD
CY2012	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	6610000	USD
CY2013	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	5753000	USD
CY2014	xel	Deferred Investment Tax Credits DeferredInvestmentTaxCredits	5543000	USD
CY2013Q4	xel	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	34231000	USD
CY2014Q4	xel	Deferred Tax Assets Deferred Investment Tax Credits DeferredTaxAssetsDeferredInvestmentTaxCredits	31886000	USD
CY2013Q4	xel	Deferred Tax Assets Environmental Remediation DeferredTaxAssetsEnvironmentalRemediation	42886000	USD
CY2014Q4	xel	Deferred Tax Assets Environmental Remediation DeferredTaxAssetsEnvironmentalRemediation	42716000	USD
CY2013Q4	xel	Deferred Tax Assets Rate Refund DeferredTaxAssetsRateRefund	49804000	USD
CY2014Q4	xel	Deferred Tax Assets Rate Refund DeferredTaxAssetsRateRefund	93956000	USD
CY2013Q4	xel	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	40947000	USD
CY2014Q4	xel	Deferred Tax Assets Regulatory Liabilities DeferredTaxAssetsRegulatoryLiabilities	49712000	USD
CY2013Q4	xel	Deferred Tax Assets Tax Credit Carryforward DeferredTaxAssetsTaxCreditCarryforward	311388000	USD
CY2014Q4	xel	Deferred Tax Assets Tax Credit Carryforward DeferredTaxAssetsTaxCreditCarryforward	346064000	USD
CY2013Q4	xel	Deferred Tax Assets Unbilled Revenue Fuel Costs DeferredTaxAssetsUnbilledRevenueFuelCosts	58908000	USD
CY2014Q4	xel	Deferred Tax Assets Unbilled Revenue Fuel Costs DeferredTaxAssetsUnbilledRevenueFuelCosts	55021000	USD
CY2012	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	559860000	USD
CY2013	xel	Deferred Tax Expense Benefit Excluding Selected Items DeferredTaxExpenseBenefitExcludingSelectedItems	588053000	USD
CY2013Q4	xel	Derivative Gross Liability Position Aggregate Fair Value DerivativeGrossLiabilityPositionAggregateFairValue	1400000	USD
CY2014Q4	xel	Derivative Gross Liability Position Aggregate Fair Value DerivativeGrossLiabilityPositionAggregateFairValue	0	USD
CY2013Q4	xel	Discounted Decommissioning Cost Obligation DiscountedDecommissioningCostObligation	2366238000	USD
CY2014Q4	xel	Discounted Decommissioning Cost Obligation DiscountedDecommissioningCostObligation	3536818000	USD
CY2013Q4	xel	Discounted Decommissioning Obligation Compared To Assets Currently Held In Trust DiscountedDecommissioningObligationComparedToAssetsCurrentlyHeldInTrust	-739212000	USD
CY2014Q4	xel	Discounted Decommissioning Obligation Compared To Assets Currently Held In Trust DiscountedDecommissioningObligationComparedToAssetsCurrentlyHeldInTrust	-1832897000	USD
CY2013Q4	xel	Effect Of Discounting Obligation Using Risk Free Interest Rate EffectOfDiscountingObligationUsingRiskFreeInterestRate	6215050000	USD
CY2014Q4	xel	Effect Of Discounting Obligation Using Risk Free Interest Rate EffectOfDiscountingObligationUsingRiskFreeInterestRate	5044470000	USD
CY2013Q4	xel	Effect Of Escalating Costs To Current Year Dollars EffectOfEscalatingCostsToCurrentYearDollars	189924000	USD
CY2014Q4	xel	Effect Of Escalating Costs To Current Year Dollars EffectOfEscalatingCostsToCurrentYearDollars	289907000	USD
CY2013Q4	xel	Effect Of Escalating Costs To Payment Date EffectOfEscalatingCostsToPaymentDate	5697285000	USD
CY2014Q4	xel	Effect Of Escalating Costs To Payment Date EffectOfEscalatingCostsToPaymentDate	5597302000	USD
CY2012	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.000
CY2013	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.006
CY2014	xel	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefits	0.002
CY2012	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.010
CY2013	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.016
CY2014	xel	Effective Income Tax Rate Reconciliation Regulatory Differences Utility Plant Items EffectiveIncomeTaxRateReconciliationRegulatoryDifferencesUtilityPlantItems	-0.013
CY2012	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	-0.011
CY2013	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	-0.008
CY2014	xel	Effective Income Tax Reconciliation Net Operating Loss Carryback EffectiveIncomeTaxReconciliationNetOperatingLossCarryback	-0.009
CY2013Q4	xel	Estimated Decommissioning Cost Obligation From Most Recently Approved Study EstimatedDecommissioningCostObligationFromMostRecentlyApprovedStudy	2694079000	USD
CY2014Q4	xel	Estimated Decommissioning Cost Obligation From Most Recently Approved Study EstimatedDecommissioningCostObligationFromMostRecentlyApprovedStudy	2694079000	USD
CY2013Q4	xel	Estimated Decommissioning Cost Obligation In Current Dollars EstimatedDecommissioningCostObligationInCurrentDollars	2884003000	USD
CY2014Q4	xel	Estimated Decommissioning Cost Obligation In Current Dollars EstimatedDecommissioningCostObligationInCurrentDollars	2983986000	USD
CY2013Q4	xel	Estimated Future Decommissioning Costs Undiscounted EstimatedFutureDecommissioningCostsUndiscounted	8581288000	USD
CY2014Q4	xel	Estimated Future Decommissioning Costs Undiscounted EstimatedFutureDecommissioningCostsUndiscounted	8581288000	USD
CY2012	xel	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Losses Gains Recognized As Regulatory Assets And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLossesGainsRecognizedAsRegulatoryAssetsAndLiabilities	10264000	USD
CY2013	xel	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Losses Gains Recognized As Regulatory Assets And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLossesGainsRecognizedAsRegulatoryAssetsAndLiabilities	10535000	USD
CY2014	xel	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Losses Gains Recognized As Regulatory Assets And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetLossesGainsRecognizedAsRegulatoryAssetsAndLiabilities	25336000	USD
	xel	Fuel Disposal Fee Charge FuelDisposalFeeCharge	0.001
	xel	Fuel Disposal Fee Charge FuelDisposalFeeCharge	0
CY2012	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	85308000	USD
CY2013	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	4704000	USD
CY2014	xel	Gain Loss On Hedging And Derivative Transactions GainLossOnHedgingAndDerivativeTransactions	-5506000	USD
CY2010Q1	xel	Income Tax Expense Benefit Related To Retiree Prescription Drug Benefits IncomeTaxExpenseBenefitRelatedToRetireePrescriptionDrugBenefits	17000000	USD
CY2012Q3	xel	Income Tax Expense Benefit Related To Retiree Prescription Drug Benefits IncomeTaxExpenseBenefitRelatedToRetireePrescriptionDrugBenefits	-17000000	USD
CY2012	xel	Matching Contributions Related To401 K Plan MatchingContributionsRelatedTo401KPlan	22200000	USD
CY2013	xel	Matching Contributions Related To401 K Plan MatchingContributionsRelatedTo401KPlan	7000000	USD
CY2014	xel	Matching Contributions Related To401 K Plan MatchingContributionsRelatedTo401KPlan	7400000	USD
CY2014	xel	Maximum Number Of Months Following End Of Annual Period In Which Revenues Are Earned To Be Included In Incentive Programs MaximumNumberOfMonthsFollowingEndOfAnnualPeriodInWhichRevenuesAreEarnedToBeIncludedInIncentivePrograms	P24M
CY2014	xel	Maximum Number Of Months Of Remaining Maturity At Time Of Purchase To Consider Investments In Certain Instruments As Cash Equivalents MaximumNumberOfMonthsOfRemainingMaturityAtTimeOfPurchaseToConsiderInvestmentsInCertainInstrumentsAsCashEquivalents	P3M
CY2014	xel	Minimum Amount Of Time Between Nuclear Decommissioning Studies In Years MinimumAmountOfTimeBetweenNuclearDecommissioningStudiesInYears	P3Y
CY2013Q4	xel	New Top Tax Rate For Dividends NewTopTaxRateForDividends	0.2
CY2012	xel	Nuclear Decommissioning Expense Externally Funded NuclearDecommissioningExpenseExternallyFunded	0	USD
CY2013	xel	Nuclear Decommissioning Expense Externally Funded NuclearDecommissioningExpenseExternallyFunded	6402000	USD
CY2014	xel	Nuclear Decommissioning Expense Externally Funded NuclearDecommissioningExpenseExternallyFunded	7138000	USD
CY2012	xel	Nuclear Decommissioning Expense Internally Funded Including Interest Costs NuclearDecommissioningExpenseInternallyFundedIncludingInterestCosts	1251000	USD
CY2013	xel	Nuclear Decommissioning Expense Internally Funded Including Interest Costs NuclearDecommissioningExpenseInternallyFundedIncludingInterestCosts	0	USD
CY2014	xel	Nuclear Decommissioning Expense Internally Funded Including Interest Costs NuclearDecommissioningExpenseInternallyFundedIncludingInterestCosts	0	USD
CY2012	xel	Nuclear Decommissioning Expense Net NuclearDecommissioningExpenseNet	-1251000	USD
CY2013	xel	Nuclear Decommissioning Expense Net NuclearDecommissioningExpenseNet	6402000	USD
CY2014	xel	Nuclear Decommissioning Expense Net NuclearDecommissioningExpenseNet	7138000	USD
CY2012	xel	Nuclear Fuel Amortization NuclearFuelAmortization	102651000	USD
CY2013	xel	Nuclear Fuel Amortization NuclearFuelAmortization	98089000	USD
CY2014	xel	Nuclear Fuel Amortization NuclearFuelAmortization	114542000	USD
CY2014Q4	xel	Number Of Additional Authorized Casks For Dry Cask Nuclear Storage Facility NumberOfAdditionalAuthorizedCasksForDryCaskNuclearStorageFacility	64	Cask
CY2010Q1	xel	Number Of Applicable Provisions Addressing Deductibility Of Retiree Health Care Costs NumberOfApplicableProvisionsAddressingDeductibilityOfRetireeHealthCareCosts	1
CY2014Q4	xel	Number Of Authorized Canisters Filled And Placed In Dry Cask Nuclear Storage Facility NumberOfAuthorizedCanistersFilledAndPlacedInDryCaskNuclearStorageFacility	15	Canister
CY2014Q4	xel	Number Of Authorized Canisters In Dry Cask Nuclear Storage Facility NumberOfAuthorizedCanistersInDryCaskNuclearStorageFacility	30	Canister
CY2014Q4	xel	Number Of Authorized Casks Filled And Placed In Dry Cask Nuclear Storage Facility NumberOfAuthorizedCasksFilledAndPlacedInDryCaskNuclearStorageFacility	38	Cask
CY2014	xel	Number Of Employers That Must Be Exceeded During Given Period In Order For Certain Union Workers To Participate In Multiemployer Plans NumberOfEmployersThatMustBeExceededDuringGivenPeriodInOrderForCertainUnionWorkersToParticipateInMultiemployerPlans	1	Employer
CY2014	xel	Number Of Leases Qualifying As Capital Leases NumberOfLeasesQualifyingAsCapitalLeases	3	Lease
CY2012Q1	xel	Number Of Shares Of Common Stock Purchased For Settlement Of Equity Awards NumberOfSharesOfCommonStockPurchasedForSettlementOfEquityAwards	900000	shares
CY2014	xel	Number Of Years Approved For Use In Decommissioning Scenario In Years NumberOfYearsApprovedForUseInDecommissioningScenarioInYears	P60Y
CY2013	xel	Number Of Years Bonus Depreciation Was Extended NumberOfYearsBonusDepreciationWasExtended	P1Y
CY2014	xel	Number Of Years Bonus Depreciation Was Extended NumberOfYearsBonusDepreciationWasExtended	P1Y
CY2014	xel	Number Of Years Of Tax Loss Carryback Period NumberOfYearsOfTaxLossCarrybackPeriod	2
CY2013Q4	xel	Other Assets Excluding Property Plant And Equipment OtherAssetsExcludingPropertyPlantAndEquipment	4567291000	USD
CY2014Q4	xel	Other Assets Excluding Property Plant And Equipment OtherAssetsExcludingPropertyPlantAndEquipment	4836588000	USD
CY2014Q4	xel	Percent Of Employees Receiving Benefits Who Are Represented By Local Labor Unions Under Collective Bargaining Agreements PercentOfEmployeesReceivingBenefitsWhoAreRepresentedByLocalLaborUnionsUnderCollectiveBargainingAgreements	0.48
CY2014Q4	xel	Percentage Of Total Obligation For Decommissioning Expected To Be Funded By External Funds PercentageOfTotalObligationForDecommissioningExpectedToBeFundedByExternalFunds	1
CY2012	xel	Pretax Charge For Project Costs PretaxChargeForProjectCosts	20766000	USD
CY2013	xel	Pretax Charge For Project Costs PretaxChargeForProjectCosts	0	USD
CY2014	xel	Pretax Charge For Project Costs PretaxChargeForProjectCosts	0	USD
CY2012	xel	Purchase Of Common Stock For Settlement Of Equity Awards PurchaseOfCommonStockForSettlementOfEquityAwards	23307000	USD
CY2013	xel	Purchase Of Common Stock For Settlement Of Equity Awards PurchaseOfCommonStockForSettlementOfEquityAwards	0	USD
CY2014	xel	Purchase Of Common Stock For Settlement Of Equity Awards PurchaseOfCommonStockForSettlementOfEquityAwards	0	USD
CY2014Q4	xel	Requestedannualaccrualfordecommissioningcosts Requestedannualaccrualfordecommissioningcosts	14000000	USD
CY2014	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Dividend Equivalent In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentInPeriodWeightedAverageGrantDateFairValue	28.04
CY2014	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Dividend Equivalents In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsInPeriod	67000	shares
CY2014	xel	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Non Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonVestedInPeriodTotalFairValue	47500000	USD
CY2013Q4	xel	Tax Benefits Associated With Nol And Tax Credit Carryforwards TaxBenefitsAssociatedWithNolAndTaxCreditCarryforwards	27100000	USD
CY2014Q4	xel	Tax Benefits Associated With Nol And Tax Credit Carryforwards TaxBenefitsAssociatedWithNolAndTaxCreditCarryforwards	28500000	USD
CY2013Q4	xel	Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate	28300000	USD
CY2014Q4	xel	Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate	50300000	USD
CY2014	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Guarantees —</font><font style="font-family:inherit;font-size:10pt;"> Xcel Energy recognizes, upon issuance or modification of a guarantee, a liability for the fair market value of the obligation that has been assumed in issuing the guarantee. This liability includes consideration of specific triggering events and other conditions which may modify the ongoing obligation to perform under the guarantee.</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The obligation recognized is reduced over the term of the guarantee as Xcel Energy is released from risk under the guarantee. See Note 13 for specific details of issued guarantees.</font></div></div>
CY2014	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications —</font><font style="font-family:inherit;font-size:10pt;"> Certain previously reported amounts have been reclassified to conform to the current year presentation.</font></div></div>
CY2014	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates —</font><font style="font-family:inherit;font-size:10pt;"> In recording transactions and balances resulting from business operations, Xcel Energy uses estimates based on the best information available. Estimates are used for such items as plant depreciable lives or potential disallowances, AROs, certain regulatory assets and liabilities, tax provisions, uncollectible amounts, environmental costs, unbilled revenues, jurisdictional fuel and energy cost allocations and actuarially determined benefit costs. The recorded estimates are revised when better information becomes available or when actual amounts can be determined. Those revisions can affect operating results.</font></div></div>

Files In Submission

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xel-20141231_pre.xml	Edgar Link	unprocessable

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$XEL
XCEL ENERGY INC Stock $xel

2013 Q4 Form 10-K Financial Statement

#000007290315000011 Filed on February 20, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$XEL XCEL ENERGY INC Stock $xel

2013 Q4 Form 10-K Financial Statement

#000007290315000011 Filed on February 20, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$XEL
XCEL ENERGY INC Stock $xel