$EXC
EXELON CORP Stock $exc

$exc Overview Financials Valuation SEC Filings Company Website

2015 Q4 Form 10-K Financial Statement

#000119312517039639 Filed on February 13, 2017

Income Statement

Concept	2015 Q4	2015 Q3	2015 Q2
Revenue	$6.702B	$7.401B	$6.514B
YoY Change	-7.62%	7.07%	8.13%
Cost Of Revenue	$2.874B	$3.291B	$2.449B
YoY Change	-20.26%	24.28%	1.53%
Gross Profit	$3.827B	$4.110B	$4.066B
YoY Change	4.79%	-3.61%	12.57%
Gross Profit Margin	57.1%	55.53%	62.42%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$467.0M	$1.291B	$839.0M
YoY Change	-43.39%	54.43%	3.58%
% of Gross Profit	12.2%	31.41%	20.63%
Operating Expenses	$3.127B	$2.912B	$2.938B
YoY Change	-8.35%	1.64%	-3.48%
Operating Profit	$707.0M	$1.200B	$1.134B
YoY Change	194.58%	-30.96%	34.68%
Interest Expense	-$278.0M	$243.0M	$145.0M
YoY Change	-18.95%	-1.62%	-36.4%
% of Operating Profit	-39.32%	20.25%	12.79%
Other Income/Expense, Net	$133.0M	-$497.0M	-$172.0M
YoY Change	-153.85%	105.37%	2050.0%
Pretax Income	$563.0M	$703.0M	$962.0M
YoY Change	389.57%	-53.01%	15.35%
Income Tax	$268.0M	$115.0M	$327.0M
% Of Pretax Income	47.6%	16.36%	33.99%
Net Earnings	$309.0M	$587.0M	$633.0M
YoY Change	1616.67%	-40.89%	21.26%
Net Earnings / Revenue	4.61%	7.93%	9.72%
Basic Earnings Per Share	$0.34	$0.69	$0.74
Diluted Earnings Per Share	$0.33	$0.69	$0.74
COMMON SHARES
Basic Shares Outstanding	921.0M shares	913.0M shares	863.0M shares
Diluted Shares Outstanding	924.0M shares	915.0M shares	866.0M shares

Balance Sheet

Concept	2015 Q4	2015 Q3	2015 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.502B	$7.265B	$6.014B
YoY Change	246.22%	162.94%	341.56%
Cash & Equivalents	$6.502B	$7.265B	$6.014B
Short-Term Investments
Other Short-Term Assets	$752.0M	$1.178B	$654.0M
YoY Change	-13.06%	15.26%	-15.61%
Inventory	$1.566B	$1.516B	$1.432B
Prepaid Expenses
Receivables	$3.187B	$3.215B	$3.227B
Other Receivables	$912.0M	$1.147B	$1.344B
Total Short-Term Assets	$15.33B	$16.87B	$15.43B
YoY Change	29.37%	42.49%	57.03%
LONG-TERM ASSETS
Property, Plant & Equipment	$57.44B	$55.81B	$53.94B
YoY Change	10.1%	8.1%	4.23%
Goodwill	$2.672B	$2.672B	$2.672B
YoY Change	0.0%	0.0%	-0.07%
Intangibles
YoY Change
Long-Term Investments	$639.0M	$620.0M	$607.0M
YoY Change
Other Assets	$1.445B	$1.499B	$1.388B
YoY Change	56.55%	31.61%	27.11%
Total Long-Term Assets	$80.05B	$78.26B	$76.79B
YoY Change	7.36%	6.58%	4.0%
TOTAL ASSETS
Total Short-Term Assets	$15.33B	$16.87B	$15.43B
Total Long-Term Assets	$80.05B	$78.26B	$76.79B
Total Assets	$95.38B	$95.13B	$92.21B
YoY Change	10.38%	11.57%	10.23%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.883B	$2.987B	$2.727B
YoY Change	-5.41%	19.38%	3.57%
Accrued Expenses	$2.376B	$1.576B	$1.366B
YoY Change	54.39%	7.8%	-1.16%
Deferred Revenue
YoY Change
Short-Term Debt	$533.0M	$675.0M	$543.0M
YoY Change	15.87%	20.11%	-12.56%
Long-Term Debt Due	$1.500B	$897.0M	$226.0M
YoY Change	-16.76%	-56.54%	-88.96%
Total Short-Term Liabilities	$9.118B	$7.847B	$6.526B
YoY Change	4.06%	-6.93%	-23.82%
LONG-TERM LIABILITIES
Long-Term Debt	$23.65B	$24.54B	$25.22B
YoY Change	23.07%	27.82%	39.08%
Other Long-Term Liabilities	$1.491B	$2.231B	$2.528B
YoY Change	-30.55%	6.04%	18.52%
Total Long-Term Liabilities	$25.14B	$26.77B	$27.75B
YoY Change	17.68%	25.67%	36.92%
TOTAL LIABILITIES
Total Short-Term Liabilities	$9.118B	$7.847B	$6.526B
Total Long-Term Liabilities	$25.14B	$26.77B	$27.75B
Total Liabilities	$68.06B	$67.84B	$67.14B
YoY Change	9.28%	12.66%	12.99%
SHAREHOLDERS EQUITY
Retained Earnings	$12.07B	$12.05B	$11.70B
YoY Change	10.61%	7.94%	12.16%
Common Stock	$18.68B	$18.65B	$16.76B
YoY Change	11.77%	11.8%	0.62%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.327B	$2.327B	$2.327B
YoY Change	0.0%	0.0%	0.0%
Treasury Stock Shares	35.00M shares	35.00M shares	35.00M shares
Shareholders Equity	$25.79B	$25.77B	$23.51B
YoY Change
Total Liabilities & Shareholders Equity	$95.38B	$95.13B	$92.21B
YoY Change	10.38%	11.57%	10.23%

Cashflow Statement

Concept	2015 Q4	2015 Q3	2015 Q2
OPERATING ACTIVITIES
Net Income	$309.0M	$587.0M	$633.0M
YoY Change	1616.67%	-40.89%	21.26%
Depreciation, Depletion And Amortization	$467.0M	$1.291B	$839.0M
YoY Change	-43.39%	54.43%	3.58%
Cash From Operating Activities	$1.942B	$1.705B	$2.479B
YoY Change	138.57%	-9.88%	56.31%
INVESTING ACTIVITIES
Capital Expenditures	-$2.181B	-$1.983B	-$1.676B
YoY Change	11.11%	22.94%	30.53%
Acquisitions
YoY Change
Other Investing Activities	$48.00M	-$160.0M	-$119.0M
YoY Change	-93.51%	-137.74%	-210.19%
Cash From Investing Activities	-$2.133B	-$2.143B	-$1.795B
YoY Change	74.41%	80.24%	52.64%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$1.870B	$1.870B
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-572.0M	1.689B	3.505B
YoY Change	20.17%	141.98%	9123.68%
NET CHANGE
Cash From Operating Activities	1.942B	1.705B	2.479B
Cash From Investing Activities	-2.133B	-2.143B	-1.795B
Cash From Financing Activities	-572.0M	1.689B	3.505B
Net Change In Cash	-763.0M	1.251B	4.189B
YoY Change	-13.79%	-10.71%	835.04%
FREE CASH FLOW
Cash From Operating Activities	$1.942B	$1.705B	$2.479B
Capital Expenditures	-$2.181B	-$1.983B	-$1.676B
Free Cash Flow	$4.123B	$3.688B	$4.155B
YoY Change	48.47%	5.22%	44.77%

Facts In Submission

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CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
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CY2016	dei	Entity Registrant Name EntityRegistrantName	EXELON CORP
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CY2016	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	126000000	USD
CY2014	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	216000000	USD
CY2015	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	232000000	USD
CY2016	exc	Realized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting RealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	237000000	USD
CY2014	exc	Regulatory Offset Nuclear Decommissioning Trust Fund Activity RegulatoryOffsetNuclearDecommissioningTrustFundActivity	358000000	USD
CY2015	exc	Regulatory Offset Nuclear Decommissioning Trust Fund Activity RegulatoryOffsetNuclearDecommissioningTrustFundActivity	-21000000	USD
CY2016	exc	Regulatory Offset Nuclear Decommissioning Trust Fund Activity RegulatoryOffsetNuclearDecommissioningTrustFundActivity	372000000	USD
CY2015Q4	exc	Restricted Stock Units Obligations Not Yet Settled RestrictedStockUnitsObligationsNotYetSettled	97000000	USD
CY2016Q4	exc	Restricted Stock Units Obligations Not Yet Settled RestrictedStockUnitsObligationsNotYetSettled	101000000	USD
CY2015Q4	exc	Total Balance Sheet Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled TotalBalanceSheetClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettled	95000000	USD
CY2016Q4	exc	Total Balance Sheet Classification Of Obligations Related To Outstanding Performance Share Awards Not Yet Settled TotalBalanceSheetClassificationOfObligationsRelatedToOutstandingPerformanceShareAwardsNotYetSettled	141000000	USD
CY2014	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	134000000	USD
CY2015	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	-197000000	USD
CY2016	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsNonregulatoryAccounting	194000000	USD
CY2014	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	180000000	USD
CY2015	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	-282000000	USD
CY2016	exc	Unrealized Gain Loss Investment Income Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossInvestmentIncomeNuclearDecommissioningTrustFundsRegulatoryAccounting	216000000	USD
CY2014	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	134000000	USD
CY2015	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	-197000000	USD
CY2016	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Nonregulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsNonregulatoryAccounting	194000000	USD
CY2014	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	180000000	USD
CY2015	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	-282000000	USD
CY2016	exc	Unrealized Gain Loss Nuclear Decommissioning Trust Funds Regulatory Accounting UnrealizedGainLossNuclearDecommissioningTrustFundsRegulatoryAccounting	216000000	USD
CY2014Q4	exc	Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain	1122000000	USD
CY2015Q4	exc	Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain	415000000	USD
CY2016Q4	exc	Unrecognized Tax Benefits For Which Timing Of Ultimate Benefits Uncertain UnrecognizedTaxBenefitsForWhichTimingOfUltimateBenefitsUncertain	83000000	USD
CY2014	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	40000000	USD
CY2015	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	1000000	USD
CY2016	exc	Unrecognized Tax Benefits Interest Income UnrecognizedTaxBenefitsInterestIncome	13000000	USD
CY2016	exc	Weighted Average Period Non Vested Performance Share Awards Are Expected To Be Recognized Over WeightedAveragePeriodNonVestedPerformanceShareAwardsAreExpectedToBeRecognizedOver	P2Y
CY2015Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	1774000000	USD
CY2016Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	2918000000	USD
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	2883000000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	3441000000	USD
CY2015Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	5000000	USD
CY2016Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	13000000	USD
CY2015Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	8000000	USD
CY2016Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	8000000	USD
CY2015Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	3187000000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	4158000000	USD
CY2015Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	2376000000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	3460000000	USD
CY2015Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	622000000	USD
CY2016Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	658000000	USD
CY2015Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	16375000000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	19169000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2624000000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2660000000	USD
CY2014	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1054000000	USD
CY2015	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1109000000	USD
CY2016	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1333000000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	0	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	127000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	119000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	175000000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	80000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	73000000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	107000000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	31000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	37000000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	284000000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	334000000	USD
CY2014	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	53000000	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	144000000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	35000000	USD
CY2014	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	179000000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	76000000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	87000000	USD
CY2014	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	191000000	USD
CY2015	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	170000000	USD
CY2016	us-gaap	Amortization Of Regulatory Asset AmortizationOfRegulatoryAsset	407000000	USD
CY2014	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17000000	shares
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	16000000	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	12000000	shares
CY2014	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	345000000	USD
CY2015	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	398000000	USD
CY2016	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	446000000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2000000	USD
CY2015Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	8585000000	USD
CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	9111000000	USD
CY2015Q4	us-gaap	Assets Assets	95384000000	USD
CY2016Q4	us-gaap	Assets Assets	114904000000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	15334000000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	12412000000	USD
CY2015Q4	us-gaap	Assets Held In Trust Noncurrent AssetsHeldInTrustNoncurrent	206000000	USD
CY2016Q4	us-gaap	Assets Held In Trust Noncurrent AssetsHeldInTrustNoncurrent	113000000	USD
CY2016Q2	us-gaap	Bridge Loan BridgeLoan	3200000000.0	USD
CY2014Q2	us-gaap	Bridge Loan BridgeLoan	7200000000.0	USD
CY2016	us-gaap	Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued	18000	shares
CY2015	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.85
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.69
CY2015	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.84
CY2016	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.69
CY2016Q1	us-gaap	Business Acquisition Share Price BusinessAcquisitionSharePrice	27.25
CY2015	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	2618000000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	1562000000	USD
CY2015	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	33823000000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	32342000000	USD
CY2016Q1	us-gaap	Business Combination Contingent Consideration Asset BusinessCombinationContingentConsiderationAsset	235000000	USD
CY2015	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	87000000	USD
CY2016	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	143000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	21797000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets	1441000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities	2752000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Noncurrent BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent	3447000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities	1515000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Indefinite Lived Intangible Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets	4005000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities	14655000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	7142000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets	248000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Long Term Debt BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt	5636000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther	187000000	USD
CY2016Q1	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	11088000000	USD
CY2014	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	289000000	USD
CY2015	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	0	USD
CY2016	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain Or Loss BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss	0	USD
CY2014	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	220000000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	96000000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	128000000	USD
CY2014	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	24000000	USD
CY2015	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	15000000	USD
CY2016	us-gaap	Capital Leases Income Statement Direct Financing Lease Revenue CapitalLeasesIncomeStatementDirectFinancingLeaseRevenue	4000000	USD
CY2015Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases CapitalLeasesNetInvestmentInDirectFinancingLeases	358000000	USD
CY2015Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Deferred Income CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome	287000000	USD
CY2015Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty	639000000	USD
CY2016Q4	us-gaap	Capital Leases Net Investment In Direct Financing Leases Unguaranteed Residual Values Of Leased Property CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty	356000000	USD
CY2014	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	186000000	USD
CY2015	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	208000000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	255000000	USD
CY2015Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	633000000	USD
CY2016Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	808000000	USD
CY2014Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	72000000	USD
CY2015Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	885000000	USD
CY2016Q4	us-gaap	Capitalized Costs Asset Retirement Costs CapitalizedCostsAssetRetirementCosts	191000000	USD
CY2014	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	140000000	USD
CY2015	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2016	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1609000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1878000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6502000000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	635000000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	269000000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	4624000000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-5867000000	USD
CY2014	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.24
CY2015	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.24
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.264
CY2015Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2016Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2000000000	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	919924742	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	924035059	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	18676000000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	18794000000	USD
CY2014	us-gaap	Competitive Energy Revenue CompetitiveEnergyRevenue	13773000000	USD
CY2015	us-gaap	Competitive Energy Revenue CompetitiveEnergyRevenue	15200000000	USD
CY2016	us-gaap	Competitive Energy Revenue CompetitiveEnergyRevenue	13960000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	979000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2329000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1098000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	197000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-19000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	70000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1176000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	2310000000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1168000000	USD
CY2016Q4	us-gaap	Contractual Obligation ContractualObligation	3297000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	648000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due In Fifth Year ContractualObligationDueInFifthYear	6000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due In Fourth Year ContractualObligationDueInFourthYear	29000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	2333000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	279000000	USD
CY2016Q4	us-gaap	Contractual Obligation Due In Third Year ContractualObligationDueInThirdYear	2000000	USD
CY2014	us-gaap	Contribution Of Property ContributionOfProperty	0	USD
CY2014	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	9369000000	USD
CY2015	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	10007000000	USD
CY2016	us-gaap	Cost Of Goods And Services Energy Commodities And Services CostOfGoodsAndServicesEnergyCommoditiesAndServices	8817000000	USD
CY2014	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	3103000000	USD
CY2015	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	3077000000	USD
CY2016	us-gaap	Cost Of Purchased Power CostOfPurchasedPower	3823000000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	25039000000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	25056000000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	28200000000	USD
CY2014	us-gaap	Debt Conversion Original Debt Amount1 DebtConversionOriginalDebtAmount1	3400000000	USD
CY2015Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	25113000000	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	33311000000	USD
CY2016Q4	us-gaap	Debt Instrument Collateral Amount DebtInstrumentCollateralAmount	2800000000	USD
CY2016	us-gaap	Debt Instrument Covenant Compliance DebtInstrumentCovenantCompliance	7.03
CY2015Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	275000000	USD
CY2016Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	962000000	USD
CY2015Q4	us-gaap	Debt Instrument Fee Amount DebtInstrumentFeeAmount	5000000	USD
CY2015Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-63000000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	-68000000	USD
CY2015Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	10342000000	USD
CY2016Q4	us-gaap	Decommissioning Fund Investments DecommissioningFundInvestments	11061000000	USD
CY2015Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	90000000	USD
CY2016Q4	us-gaap	Decommissioning Liability Noncurrent DecommissioningLiabilityNoncurrent	14000000	USD
CY2015Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	22611000000	USD
CY2016Q4	us-gaap	Deferred Costs And Other Assets DeferredCostsAndOtherAssets	30937000000	USD
CY2015Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	34658000000	USD
CY2016Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	41619000000	USD
CY2015Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	180000000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	200000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13149000000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	17457000000	USD
CY2015Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	13776000000	USD
CY2016Q4	us-gaap	Deferred Income Taxes And Other Tax Liabilities Noncurrent DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent	18138000000	USD
CY2014	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	502000000	USD
CY2015	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	752000000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	664000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	595000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	650000000	USD
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CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	446000000	USD
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CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	17966000000	USD
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CY2016Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	3319000000	USD
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CY2016	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	9000000	USD
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CY2015	us-gaap	Depreciation Depreciation	2227000000	USD
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CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	392000000	USD
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CY2015	us-gaap	Distribution Made To Limited Liability Company Llc Member Cash Distributions Declared DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	0	USD
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CY2016	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	8000000	USD
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CY2016Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	706000000	USD
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CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
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CY2015	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Medicare Prescription Drug Benefit EffectiveIncomeTaxRateReconciliationDeductionsMedicarePrescriptionDrugBenefit	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Other EffectiveIncomeTaxRateReconciliationDeductionsOther	0.055
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CY2015	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.007
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.000
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CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.000
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CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Investment EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment	0.012
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.024
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.019
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Other EffectiveIncomeTaxRateReconciliationTaxCreditsOther	0.036
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CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0.014
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0.004
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CY2014	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	9467000000	USD
CY2015	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	9876000000	USD
CY2016	us-gaap	Electric Utility Revenue ElectricUtilityRevenue	13869000000	USD
CY2014	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	16637000000	USD
CY2015	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	18395000000	USD
CY2016	us-gaap	Electrical Generation Revenue ElectricalGenerationRevenue	16324000000	USD
CY2016Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions	51000000	USD
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CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit Realized From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions	18000000	USD
CY2015Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	302000000	USD
CY2016Q4	us-gaap	Energy Marketing Accounts Payable EnergyMarketingAccountsPayable	428000000	USD
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CY2016Q4	us-gaap	Energy Marketing Contract Liabilities Current EnergyMarketingContractLiabilitiesCurrent	407000000	USD
CY2015Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	117000000	USD
CY2016Q4	us-gaap	Energy Marketing Contract Liabilities Noncurrent EnergyMarketingContractLiabilitiesNoncurrent	830000000	USD
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CY2016Q4	us-gaap	Energy Marketing Contracts Assets Noncurrent EnergyMarketingContractsAssetsNoncurrent	447000000	USD
CY2015Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	462000000	USD
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CY2015Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	112000000	USD
CY2016Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	311000000	USD
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CY2015	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2016	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2016Q4	us-gaap	Escrow Deposit EscrowDeposit	6000000	USD
CY2015	us-gaap	Extinguishment Of Debt Amount ExtinguishmentOfDebtAmount	44000000	USD
CY2016	us-gaap	Extinguishment Of Debt Amount ExtinguishmentOfDebtAmount	45000000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1504000000	USD
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CY2016	us-gaap	Gas Domestic Regulated Revenue GasDomesticRegulatedRevenue	1166000000	USD
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CY2014Q4	us-gaap	Goodwill Goodwill	2672000000	USD
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CY2015Q4	us-gaap	Goodwill Gross GoodwillGross	4655000000	USD
CY2016Q4	us-gaap	Goodwill Gross GoodwillGross	8660000000	USD
CY2014Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1983000000	USD
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CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	3330000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	1989000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2486000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	3330000000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1989000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.89
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CY2016	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.23
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CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7000000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-24000000	USD
CY2014	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-20000000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	0	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	0	USD
CY2015	us-gaap	Income Tax Effects Allocated Directly To Equity Other IncomeTaxEffectsAllocatedDirectlyToEquityOther	0	USD
CY2016	us-gaap	Income Tax Effects Allocated Directly To Equity Other IncomeTaxEffectsAllocatedDirectlyToEquityOther	0	USD
CY2016	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	106000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	666000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1073000000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	761000000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	314000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	342000000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-441000000	USD
CY2014	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-1719000000	USD
CY2015	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	347000000	USD
CY2016	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	931000000	USD
CY2016Q4	us-gaap	Interest Rate Fair Value Hedge Asset At Fair Value InterestRateFairValueHedgeAssetAtFairValue	16000000	USD
CY2014	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1065000000	USD
CY2015	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1033000000	USD
CY2016	us-gaap	Interest Revenue Expense Net InterestRevenueExpenseNet	1536000000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	771000000	USD
CY2014	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-143000000	USD
CY2015	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	97000000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	576000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	380000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-4000000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-7000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	157000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	387000000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	621000000	USD
CY2014	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	2000000	USD
CY2016Q1	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	35000000	USD
CY2016Q1	us-gaap	Increase Decrease In Postretirement Obligations IncreaseDecreaseInPostretirementObligations	-8000000	USD
CY2014	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-38000000	USD
CY2015	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-58000000	USD
CY2016	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	66000000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	0	USD
CY2015	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	0	USD
CY2016	us-gaap	Increase Decrease In Prepaid Taxes IncreaseDecreaseInPrepaidTaxes	1250000000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	318000000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-240000000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	432000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	104000000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-66000000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	42000000	USD
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4000000	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000000	shares
CY2014	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	63000000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	79000000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	108000000	USD
CY2014	us-gaap	Interest Costs Incurred InterestCostsIncurred	1144000000	USD
CY2015	us-gaap	Interest Costs Incurred InterestCostsIncurred	1170000000	USD
CY2016	us-gaap	Interest Costs Incurred InterestCostsIncurred	1678000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	1024000000	USD
CY2015	us-gaap	Interest Expense InterestExpense	992000000	USD
CY2016	us-gaap	Interest Expense InterestExpense	1495000000	USD
CY2014	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	41000000	USD
CY2015	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	41000000	USD
CY2016	us-gaap	Interest Expense Related Party InterestExpenseRelatedParty	41000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	940000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	930000000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	1340000000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	915000000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1234000000	USD
CY2015Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	1104000000	USD
CY2016Q4	us-gaap	Inventory Raw Materials And Supplies InventoryRawMaterialsAndSupplies	1274000000	USD
CY2014	us-gaap	Inventory Write Down InventoryWriteDown	5000000	USD
CY2015	us-gaap	Inventory Write Down InventoryWriteDown	10000000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	12000000	USD
CY2014	us-gaap	Investment Income Interest InvestmentIncomeInterest	1000000	USD
CY2015	us-gaap	Investment Income Interest InvestmentIncomeInterest	8000000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	17000000	USD
CY2014Q2	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	1150000000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	865000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	922000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	777000000	USD
CY2016Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1510000000	USD
CY2015Q4	us-gaap	Liabilities Liabilities	68062000000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	87292000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	95384000000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	114904000000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	9118000000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	13457000000	USD
CY2016Q4	us-gaap	Line Of Credit LineOfCredit	75000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Capacity Available For Trade Purchases LineOfCreditFacilityCapacityAvailableForTradePurchases	7108000000	USD
CY2016	us-gaap	Line Of Credit Facility Covenant Terms LineOfCreditFacilityCovenantTerms	2.50
CY2016Q1	us-gaap	Line Of Credit Facility Increase Decrease Other Net LineOfCreditFacilityIncreaseDecreaseOtherNet	45000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	7915000000	USD
CY2016	us-gaap	Litigation Settlement Amount LitigationSettlementAmount	-28000000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	33959000000	USD
CY2015Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	1500000000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2430000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1500000000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2430000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	22996000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	2430000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	2400000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	3331000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	1060000000	USD
CY2016Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1742000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	23645000000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	31575000000	USD
CY2015Q4	us-gaap	Long Term Investments LongTermInvestments	639000000	USD
CY2016Q4	us-gaap	Long Term Investments LongTermInvestments	629000000	USD
CY2016Q4	us-gaap	Loss Contingency Accrual Payments LossContingencyAccrualPayments	44000000	USD
CY2016Q4	us-gaap	Loss Contingency Loss In Period LossContingencyLossInPeriod	50000000	USD
CY2015	us-gaap	Loss On Contract Termination LossOnContractTermination	26000000	USD
CY2016	us-gaap	Loss On Contract Termination LossOnContractTermination	3000000	USD
CY2015Q4	us-gaap	Minority Interest MinorityInterest	1308000000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	1775000000	USD
CY2016	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	0	USD
CY2014	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4000000	USD
CY2015	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	1111000000	USD
CY2015	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-4000000	USD
CY2016	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	5000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	411000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	4830000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1191000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4599000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-7822000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-15503000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	4457000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7616000000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8445000000	USD
CY2014	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	197000000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-19000000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	70000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1623000000	USD
CY2015Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	693000000	USD
CY2015Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	638000000	USD
CY2015Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	629000000	USD
CY2015Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	309000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2269000000	USD
CY2016Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	173000000	USD
CY2016Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	267000000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	490000000	USD
CY2016Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	204000000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1134000000	USD
CY2014	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	44000000	USD
CY2016	us-gaap	Noncash Merger Related Costs NoncashMergerRelatedCosts	558000000	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	54000000	USD
CY2014	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	1548000000	USD
CY2016	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	396000000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-610000000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1079000000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1123000000	USD
CY2015Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	76000000	USD
CY2016Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	109000000	USD
CY2015Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	14000000	USD
CY2016Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	15000000	USD
CY2015Q4	us-gaap	Notes Receivable Net NotesReceivableNet	15000000	USD
CY2016Q4	us-gaap	Notes Receivable Net NotesReceivableNet	9000000	USD
CY2016	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	12	Reportable_segment
CY2014	us-gaap	Operating Expenses OperatingExpenses	25039000000	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	25056000000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	28200000000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	3096000000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	1366000000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	1134000000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1200000000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	707000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	4409000000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	483000000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	647000000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	1267000000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	714000000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	3112000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	1726000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	183000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	133000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	140000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	123000000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	179000000	USD
CY2015Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	133000000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	260000000	USD
CY2015Q4	us-gaap	Other Assets Current OtherAssetsCurrent	752000000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	930000000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1445000000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1472000000	USD
CY2016Q2	us-gaap	Other Commitment OtherCommitment	137000000	USD
CY2016Q4	us-gaap	Other Commitment OtherCommitment	513000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-9000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-21000000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	10000000	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	-30000000	USD
CY2015	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	-46000000	USD
CY2016	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	-48000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-136000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-186000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-644000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	60000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-36000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	497000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	99000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	181000000	USD
CY2016Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-3000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-147000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-220000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-184000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	412000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-53000000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	30000000	USD
CY2016Q1	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-148000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	9000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	2000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	96000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-6000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	8000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3000000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-4000000	USD
CY2014	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8568000000	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8322000000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	10048000000	USD
CY2014	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2314000000	USD
CY2015	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	2450000000	USD
CY2016	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	3936000000	USD
CY2014	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	200000000	USD
CY2015	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	201000000	USD
CY2016	us-gaap	Other Labor Related Expenses OtherLaborRelatedExpenses	226000000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	842000000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	981000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1491000000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1827000000	USD
CY2015	us-gaap	Other Noncash Expense OtherNoncashExpense	77000000	USD
CY2014	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1054000000	USD
CY2015	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1109000000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1333000000	USD
CY2014	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	9000000	USD
CY2015	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	17000000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	24000000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	455000000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-46000000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	413000000	USD
CY2014	us-gaap	Other Operating Income OtherOperatingIncome	154000000	USD
CY2015	us-gaap	Other Operating Income OtherOperatingIncome	757000000	USD
CY2016	us-gaap	Other Operating Income OtherOperatingIncome	211000000	USD
CY2015Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1618000000	USD
CY2016Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	1848000000	USD
CY2015Q4	us-gaap	Other Receivables OtherReceivables	912000000	USD
CY2016Q4	us-gaap	Other Receivables OtherReceivables	1201000000	USD
CY2015Q4	us-gaap	Payables To Customers PayablesToCustomers	0	USD
CY2016Q4	us-gaap	Payables To Customers PayablesToCustomers	151000000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	88000000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	119000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	153000000	USD
CY2015	us-gaap	Payments For Restructuring PaymentsForRestructuring	31000000	USD
CY2016	us-gaap	Payments For Restructuring PaymentsForRestructuring	46000000	USD
CY2015Q4	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4000000	USD
CY2015	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	-22000000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1065000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1105000000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1166000000	USD
CY2014	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	421000000	USD
CY2015	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	0	USD
CY2016	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	0	USD
CY2014	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	386000000	USD
CY2015	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	40000000	USD
CY2016	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	6934000000	USD
CY2014	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	3000000	USD
CY2015	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2016	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2014	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	7551000000	USD
CY2015	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	7147000000	USD
CY2016	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	9738000000	USD
CY2015Q4	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	229000000	USD
CY2016Q4	us-gaap	Payments To Acquire Other Receivables PaymentsToAcquireOtherReceivables	313000000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6077000000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7624000000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8553000000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	617000000	USD
CY2015	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	502000000	USD
CY2016	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	397000000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	560000000	USD
CY2015	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	637000000	USD
CY2016	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	619000000	USD
CY2015	us-gaap	Preferred Stock Redemption Premium PreferredStockRedemptionPremium	13000000	USD
CY2016	us-gaap	Preferred Stock Redemption Premium PreferredStockRedemptionPremium	-193000000	USD
CY2015Q4	us-gaap	Preferred Stock Value PreferredStockValue	193000000	USD
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015Q4	us-gaap	Prepaid Taxes PrepaidTaxes	0	USD
CY2016Q4	us-gaap	Prepaid Taxes PrepaidTaxes	1250000000	USD
CY2016	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	13000000	USD
CY2014	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	13000000	USD
CY2015	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2016	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	USD
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1868000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	3463000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	6709000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	4716000000	USD
CY2014	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2015	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	32000000	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	372000000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-178000000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-99000000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-85000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	122000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	80000000	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-353000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	0	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	0	USD
CY2016	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	240000000	USD
CY2014	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	0	USD
CY2015	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	0	USD
CY2016	us-gaap	Proceeds From Repurchase Of Redeemable Preferred Stock ProceedsFromRepurchaseOfRedeemablePreferredStock	-190000000	USD
CY2014	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	335000000	USD
CY2015	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	0	USD
CY2016	us-gaap	Proceeds From Sale And Collection Of Lease Receivables ProceedsFromSaleAndCollectionOfLeaseReceivables	360000000	USD
CY2014	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	7396000000	USD
CY2015	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	6895000000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	9496000000	USD
CY2014	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	7000000	USD
CY2015	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2016	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	0	USD
CY2014	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	1719000000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	147000000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Held For Sale ProceedsFromSaleOfPropertyHeldForSale	61000000	USD
CY2014	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	7000000	USD
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	19000000	USD
CY2014	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	35000000	USD
CY2015	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	32000000	USD
CY2016	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	55000000	USD
CY2014	us-gaap	Profit Loss ProfitLoss	1820000000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	2250000000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	1204000000	USD
CY2015	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1200000000	USD
CY2016	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1576000000	USD
CY2014	us-gaap	Taxes Other TaxesOther	102000000	USD
CY2015	us-gaap	Taxes Other TaxesOther	118000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	73814000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	90724000000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	57439000000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	71555000000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	156000000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	120000000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	155000000	USD
CY2014	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	21000000	USD
CY2015	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	24000000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	64000000	USD
CY2014	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	37000000	USD
CY2015	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	44000000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Interest PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest	98000000	USD
CY2015Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	55000000	USD
CY2016Q4	us-gaap	Public Utilities Amount Of Allowance For Earnings On Equity Capitalized For Rate Making Purposes PublicUtilitiesAmountOfAllowanceForEarningsOnEquityCapitalizedForRateMakingPurposes	72000000	USD
CY2015Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	57439000000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	71555000000	USD
CY2014	us-gaap	Public Utilities Requested Rate Increase Decrease Amount PublicUtilitiesRequestedRateIncreaseDecreaseAmount	269	USD
CY2015	us-gaap	Public Utilities Requested Rate Increase Decrease Amount PublicUtilitiesRequestedRateIncreaseDecreaseAmount	-50	USD
CY2016	us-gaap	Public Utilities Requested Rate Increase Decrease Amount PublicUtilitiesRequestedRateIncreaseDecreaseAmount	138	USD
CY2014	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	396000000	USD
CY2015	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	407000000	USD
CY2016	us-gaap	Real Estate Tax Expense RealEstateTaxExpense	483000000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-196000000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-150000000	USD
CY2015Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	28000000	USD
CY2016Q4	us-gaap	Redeemable Noncontrolling Interest Equity Common Carrying Amount RedeemableNoncontrollingInterestEquityCommonCarryingAmount	0	USD
CY2015Q4	us-gaap	Redemption Premium RedemptionPremium	9000000	USD
CY2014	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	10792000000	USD
CY2015	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	11052000000	USD
CY2016	us-gaap	Regulated Operating Revenue RegulatedOperatingRevenue	15036000000	USD
CY2015Q4	us-gaap	Regulatory Assets RegulatoryAssets	6824000000	USD
CY2016Q4	us-gaap	Regulatory Assets RegulatoryAssets	11388000000	USD
CY2015Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	759000000	USD
CY2016Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	1342000000	USD
CY2015Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	6065000000	USD
CY2016Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	10046000000	USD
CY2015Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	4570000000	USD
CY2016Q4	us-gaap	Regulatory Liabilities RegulatoryLiabilities	4789000000	USD
CY2015Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	369000000	USD
CY2016Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	602000000	USD
CY2015Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4201000000	USD
CY2016Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	4187000000	USD
CY2014	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	531000000	USD
CY2015	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	0	USD
CY2016	us-gaap	Related Party Transaction Purchases From Related Party RelatedPartyTransactionPurchasesFromRelatedParty	0	USD
CY2014	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	0	USD
CY2015	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	0	USD
CY2016	us-gaap	Repayments Of Debt Maturing In More Than Three Months RepaymentsOfDebtMaturingInMoreThanThreeMonths	462000000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1545000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2687000000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1936000000	USD
CY2015Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	205000000	USD
CY2016Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	253000000	USD
CY2016	us-gaap	Restructuring Costs RestructuringCosts	99000000	USD
CY2014Q4	us-gaap	Restructuring Reserve RestructuringReserve	50000000	USD
CY2015Q4	us-gaap	Restructuring Reserve RestructuringReserve	35000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	88000000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	12068000000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	12030000000	USD
CY2014	us-gaap	Revenue From Purchased Oil And Gas RevenueFromPurchasedOilAndGas	2704000000	USD
CY2015	us-gaap	Revenue From Purchased Oil And Gas RevenueFromPurchasedOilAndGas	2433000000	USD
CY2016	us-gaap	Revenue From Purchased Oil And Gas RevenueFromPurchasedOilAndGas	2146000000	USD
CY2014	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	23000000	USD
CY2015	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	9000000	USD
CY2016	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	10000000	USD
CY2014	us-gaap	Revenues Revenues	27429000000	USD
CY2015Q1	us-gaap	Revenues Revenues	8830000000	USD
CY2015Q2	us-gaap	Revenues Revenues	6514000000	USD
CY2015Q3	us-gaap	Revenues Revenues	7401000000	USD
CY2015Q4	us-gaap	Revenues Revenues	6702000000	USD
CY2015	us-gaap	Revenues Revenues	29447000000	USD
CY2016Q1	us-gaap	Revenues Revenues	7573000000	USD
CY2016Q2	us-gaap	Revenues Revenues	6910000000	USD
CY2016Q3	us-gaap	Revenues Revenues	9002000000	USD
CY2016Q4	us-gaap	Revenues Revenues	7875000000	USD
CY2016	us-gaap	Revenues Revenues	31360000000	USD
CY2015Q3	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	32.48
CY2014	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	6000000	USD
CY2015	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	5000000	USD
CY2016	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	7000000	USD
CY2016Q1	us-gaap	Secured Demand Note Deficiency SecuredDemandNoteDeficiency	23000000	USD
CY2015	us-gaap	Severance Costs1 SeveranceCosts1	18000000	USD
CY2016	us-gaap	Severance Costs1 SeveranceCosts1	19000000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	91000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	97000000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	111000000	USD
CY2014	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3000000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11000000	USD
CY2015Q1	us-gaap	Share Price SharePrice	33.61
CY2015Q2	us-gaap	Share Price SharePrice	31.42
CY2015Q3	us-gaap	Share Price SharePrice	29.70
CY2015Q4	us-gaap	Share Price SharePrice	27.77
CY2016Q1	us-gaap	Share Price SharePrice	35.86
CY2016Q2	us-gaap	Share Price SharePrice	36.36
CY2016Q3	us-gaap	Share Price SharePrice	33.29
CY2016Q4	us-gaap	Share Price SharePrice	35.49
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
CY2013Q4	us-gaap	Shares Issued SharesIssued	892034000	shares
CY2014Q4	us-gaap	Shares Issued SharesIssued	894568000	shares
CY2015Q4	us-gaap	Shares Issued SharesIssued	954668000	shares
CY2016Q4	us-gaap	Shares Issued SharesIssued	958778000	shares
CY2014Q2	us-gaap	Shares Issued Price Per Share SharesIssuedPricePerShare	35
CY2015Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	533000000	USD
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1267000000	USD
CY2015Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1021000000	USD
CY2016Q4	us-gaap	Spent Nuclear Fuel Obligation Noncurrent SpentNuclearFuelObligationNoncurrent	1024000000	USD
CY2014	us-gaap	Stock Issued1 StockIssued1	131000000	USD
CY2014	us-gaap	Stock Issued During Period Shares Acquisitions StockIssuedDuringPeriodSharesAcquisitions	0	shares
CY2014	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	960000	shares
CY2015	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1170000	shares
CY2016	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	1242000	shares
CY2015	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	57500000	shares
CY2014	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	1574000	shares
CY2015	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	1430000	shares
CY2016	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	2868000	shares
CY2014	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	-421000000	USD
CY2014	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	35000000	USD
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	32000000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	55000000	USD
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1868000000	USD
CY2014	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	72000000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	70000000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	85000000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	25793000000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	25837000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	22940000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	24133000000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	27294000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	27612000000	USD
CY2016	us-gaap	Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions	1
CY2016	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	24000000	USD
CY2014	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	1154000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-255000000	USD
CY2016	us-gaap	Taxes Other TaxesOther	114000000	USD
CY2015Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	293000000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	723000000	USD
CY2014	us-gaap	Temporary Equity Other Changes TemporaryEquityOtherChanges	-528000000	USD
CY2015	us-gaap	Temporary Equity Other Changes TemporaryEquityOtherChanges	4000000	USD
CY2014Q2	us-gaap	Temporary Equity Share Subscriptions TemporaryEquityShareSubscriptions	57500000	shares
CY2015Q3	us-gaap	Temporary Equity Share Subscriptions TemporaryEquityShareSubscriptions	57500000	shares
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	35000000	shares
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2327000000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2327000000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2300000000	USD
CY2015Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	180000000	USD
CY2016Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	200000000	USD
CY2015Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1203000000	USD
CY2016Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	1673000000	USD
CY2014	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-716000000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	367000000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-24000000	USD
CY2014	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-693000000	USD
CY2015	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	357000000	USD
CY2016	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-41000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2175000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1829000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1078000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	916000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	116000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	21000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	35000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	31000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	27000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	106000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpense	106000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	22000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	15000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	108000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	108000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	18000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	79000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	88000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities	8000000	USD
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	924000000	shares
CY2015	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-705000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-332000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	88000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	86000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	701000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	538000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	633000000	USD
CY2014	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	531000000	USD
CY2015	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	0	USD
CY2016	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	0	USD
CY2014	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	456000000	USD
CY2015	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	474000000	USD
CY2016	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	753000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	8918000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	9517000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3400000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	3598000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	18000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	427000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	1205000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	147000000	USD
CY2016Q4	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	502000000	USD
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	864000000	shares
CY2015Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	867000000	shares
CY2015Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	866000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	915000000	shares
CY2015Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	924000000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	893000000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	925000000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	926000000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	927000000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	928000000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	927000000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	860000000	shares
CY2015Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	862000000	shares
CY2015Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	863000000	shares
CY2015Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	913000000	shares
CY2015Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	921000000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	890000000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	923000000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	924000000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	925000000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	925000000	shares
CY2016	exc	Scheduleofjointlyownedelectricutilityplanttextblock Scheduleofjointlyownedelectricutilityplanttextblock	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;"></font><font style="font-family:Arial;font-size:10pt;font-weight:bold;">Jointly Owned Electric Utility Plant</font><font style="font-family:Arial;font-size:10pt;font-weight:bold;"> (Exelon, Generation, PECO, BGE, PHI, Pepco, DPL and ACE)</font></div><div style="line-height:120%;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Exelon's, Generation's, PECO's, BGE's, PHI's and ACE's undivided ownership interests in jointly owned electric plants and transmission facilities at </font><font style="font-family:Arial;font-size:10pt;">December 31, 2016</font><font style="font-family:Arial;font-size:10pt;"> and </font><font style="font-family:Arial;font-size:10pt;">2015</font><font style="font-family:Arial;font-size:10pt;"> were as follows:</font></div><div style="line-height:120%;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="32" rowspan="1"></td></tr><tr><td style="width:21%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:7%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="15" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Nuclear Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Fossil Fuel Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Transmission</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Other</font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Quad Cities</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Peach</font></div><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Bottom</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Salem</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(a)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Nine Mile Point Unit 2</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Wyman</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">PA</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(b)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">NJ/ DE</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(c)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Other</font><font style="font-family:Arial;font-size:7pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(d)</sup></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Operator</font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">PSEG</font></div><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Nuclear</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Generation</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">FP&L</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">First</font></div><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Energy</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">PSEG/ DPL</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Ownership interest</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">75.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">50.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">42.59</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">82.00</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">5.89</font></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">%</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">various</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Exelon’s share at December 31, 2016:</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Plant</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,054</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,384</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">596</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">830</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">27</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">97</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Accumulated depreciation</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">515</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">407</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">186</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">68</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">52</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">13</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Construction work in progress</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">16</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">41</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">37</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;font-weight:bold;">Exelon’s share at December 31, 2015:</font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Plant</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,035</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">1,345</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">566</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:middle;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">756</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">27</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">93</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">$</font></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Accumulated depreciation</font><font style="font-family:Arial;font-size:7pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(e)</sup></font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">309</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">368</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">167</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">42</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">3</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">15</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">52</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">13</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:top;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">Construction work in progress</font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">11</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">18</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">40</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:middle;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">56</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:7pt;"><font style="font-family:Arial;font-size:7pt;">—</font></div></td><td style="vertical-align:bottom;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><div style="line-height:120%;font-size:7.5pt;"><font style="font-family:inherit;font-size:7.5pt;">________________________</font></div><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:7.5pt;padding-left:0px;"><font style="font-family:Arial;font-size:7.5pt;">(a)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;">Generation also owns a proportionate share in the fossil fuel combustion turbine at Salem, which is fully depreciated. The gross book value was </font><font style="font-family:Arial;font-size:7.5pt;">$3 million</font><font style="font-family:Arial;font-size:7.5pt;"> at </font><font style="font-family:Arial;font-size:7.5pt;">December 31, 2016</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">2015</font><font style="font-family:Arial;font-size:7.5pt;">.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:7.5pt;padding-left:0px;"><font style="font-family:Arial;font-size:7.5pt;">(b)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;">PECO, BGE, Pepco, DPL and ACE own a </font><font style="font-family:Arial;font-size:7.5pt;">22%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">7%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">27%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">9%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">8%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively, in </font><font style="font-family:Arial;font-size:7.5pt;">127</font><font style="font-family:Arial;font-size:7.5pt;"> miles of </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV lines located in Pennsylvania as well as a </font><font style="font-family:Arial;font-size:7.5pt;">20.72%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">10.56%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">9.72%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">3.72%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">3.83%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively, of a </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV substation immediately outside of the Conemaugh fossil generating station which supplies power to the </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV lines including, but not limited to, the lines noted above.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:7.5pt;padding-left:0px;"><font style="font-family:Arial;font-size:7.5pt;">(c)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;">PECO, DPL and ACE own a </font><font style="font-family:Arial;font-size:7.5pt;">42.55%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">1%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">13.9%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively in </font><font style="font-family:Arial;font-size:7.5pt;">151.3</font><font style="font-family:Arial;font-size:7.5pt;"> miles of </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV lines located in New Jersey and Delaware Station. PECO, DPL and ACE also own a </font><font style="font-family:Arial;font-size:7.5pt;">42.55%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">7.45%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">7.45%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively, in </font><font style="font-family:Arial;font-size:7.5pt;">2.5</font><font style="font-family:Arial;font-size:7.5pt;"> miles of </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV line located over the Delaware River. ACE also has a </font><font style="font-family:Arial;font-size:7.5pt;">21.78%</font><font style="font-family:Arial;font-size:7.5pt;"> share in a </font><font style="font-family:Arial;font-size:7.5pt;">500</font><font style="font-family:Arial;font-size:7.5pt;">kV New Freedom Switching</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:7.5pt;padding-left:0px;"><font style="font-family:Arial;font-size:7.5pt;">(d)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;">Generation, DPL and ACE own a </font><font style="font-family:Arial;font-size:7.5pt;">44.24%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">4.83%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">11.91%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively in assets located at Merrill Creek Reservoir located in New Jersey. Pepco, DPL and ACE own a </font><font style="font-family:Arial;font-size:7.5pt;">11.9%</font><font style="font-family:Arial;font-size:7.5pt;">, </font><font style="font-family:Arial;font-size:7.5pt;">7.4%</font><font style="font-family:Arial;font-size:7.5pt;"> and </font><font style="font-family:Arial;font-size:7.5pt;">6.6%</font><font style="font-family:Arial;font-size:7.5pt;"> share, respectively, in Valley Forge Corporate Center.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:7.5pt;padding-left:0px;"><font style="font-family:Arial;font-size:7.5pt;">(e)</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;">Excludes asset retirement costs.</font></div></td></tr></table><div style="line-height:120%;padding-left:4px;text-align:justify;padding-left:24px;font-size:7.5pt;"><font style="font-family:Arial;font-size:7.5pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Exelon’s, Generation’s, PECO’s, BGE’s, Pepco's, DPL's and ACE's undivided ownership interests are financed with their funds and all operations are accounted for as if such participating interests were wholly-owned facilities. Exelon’s, Generation’s, PECO’s, BGE’s, Pepco's, DPL's and ACE's share of direct expenses of the jointly owned plants are included in Purchased power and fuel and Operating and maintenance expenses on Exelon’s and Generation’s Consolidated Statements of Operations and Comprehensive Income and in Operating and maintenance expenses on PECO’s, BGE’s, Pepco, DPL's and ACE's Consolidated Statements of Operations and Comprehensive Income.</font></div></div>
CY2015Q4	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	9000000	USD
CY2016	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:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">Guarantees (All Registrants)</font></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The Registrants recognize, at the inception of a guarantee, a liability for the fair market value of the obligations they have undertaken by issuing the guarantee, including the ongoing obligation to perform over the term of the guarantee in the event that the specified triggering events or conditions occur.</font></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The liability that is initially recognized at the inception of the guarantee is reduced as the Registrants are released from risk under the guarantee. Depending on the nature of the guarantee, the release from risk of the Registrant may be recognized only upon the expiration or settlement of the guarantee or by a systematic and rational amortization method over the term of the guarantee. See Note </font><font style="font-family:Arial;font-size:10pt;">24</font><font style="font-family:Arial;font-size:10pt;"> — </font><font style="font-family:Arial;font-size:10pt;">Commitments and Contingencies</font><font style="font-family:Arial;font-size:10pt;"> for additional information.</font></div></div>
CY2016	us-gaap	Reclassifications Reclassifications	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">Reclassifications (All Registrants)</font></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Certain prior year amounts in the Registrants' Consolidated Statements of Operations and Comprehensive Income, Consolidated Balance Sheets and Consolidated Statements of Cash Flows have been reclassified between line items for comparative purposes. The reclassifications did not affect any of the Registrants’ net income, financial positions, or cash flows from operating activities.</font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">Certain prior year amounts in the Consolidated Statements of Operations and Comprehensive Income, Consolidated Balance Sheets and Consolidated Statements of Cash Flows of PHI, Pepco, DPL and ACE have been reclassified to conform the presentation of these amounts to the current period presentation in Exelon’s financial statements. Most significantly for PHI, Pepco, DPL and ACE, current regulatory assets and liabilities have been presented separately from the non-current portions in each respective Consolidated Balance Sheet where recovery or refund is expected within the next 12 months.  Additionally, for PHI, Pepco, DPL and ACE, the removal cost within Accumulated depreciation was reclassified to the Regulatory liability or Regulatory asset account to align with Exelon’s presentation. The reclassifications were not considered errors in the prior financial statements. </font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;font-weight:bold;">Use of Estimates (All Registrants)</font></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><font style="font-family:inherit;font-size:8pt;"> </font></div><div style="line-height:120%;text-align:justify;text-indent:32px;font-size:10pt;"><font style="font-family:Arial;font-size:10pt;">The preparation of financial statements of each of the Registrants in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Areas in which significant estimates have been made include, but are not limited to, the accounting for nuclear decommissioning costs and other AROs, pension and other postretirement benefits, the application of purchase accounting, inventory reserves, allowance for uncollectible accounts, goodwill and asset impairments, derivative instruments, unamortized energy contracts, fixed asset depreciation, environmental costs and other loss contingencies, taxes and unbilled energy revenues. Actual results could differ from those estimates.</font></div></div>

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$EXC
EXELON CORP Stock $exc

2015 Q4 Form 10-K Financial Statement

#000119312517039639 Filed on February 13, 2017

Income Statement

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Facts In Submission

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$EXC EXELON CORP Stock $exc

2015 Q4 Form 10-K Financial Statement

#000119312517039639 Filed on February 13, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EXC
EXELON CORP Stock $exc