2014 Q4 Form 10-K Financial Statement
#000078497716000067 Filed on February 12, 2016
Income Statement
| Concept | 2014 Q4 | 2013 Q2 | 2013 |
|---|---|---|---|
| Revenue | $500.0M | $403.0M | $1.810B |
| YoY Change | 0.2% | -2.42% | 0.28% |
| Cost Of Revenue | $214.0M | $220.0M | $982.0M |
| YoY Change | -22.18% | 6.28% | 4.8% |
| Gross Profit | $286.0M | $183.0M | $828.0M |
| YoY Change | 27.68% | -11.17% | -4.61% |
| Gross Profit Margin | 57.2% | 45.41% | 45.75% |
| Selling, General & Admin | $63.00M | $55.00M | $219.0M |
| YoY Change | 3.28% | -1.79% | 1.39% |
| % of Gross Profit | 22.03% | 30.05% | 26.45% |
| Research & Development | |||
| YoY Change | |||
| % of Gross Profit | |||
| Depreciation & Amortization | $77.00M | $62.00M | $248.0M |
| YoY Change | 24.19% | -1.59% | 0.0% |
| % of Gross Profit | 26.92% | 33.88% | 29.95% |
| Operating Expenses | $167.0M | $194.0M | $622.0M |
| YoY Change | 13.61% | 33.79% | 9.89% |
| Operating Profit | $119.0M | -$11.00M | $206.0M |
| YoY Change | 54.55% | -118.03% | -31.79% |
| Interest Expense | -$61.00M | $25.00M | $101.0M |
| YoY Change | 134.62% | -7.41% | -6.48% |
| % of Operating Profit | -51.26% | 49.03% | |
| Other Income/Expense, Net | $0.00 | $3.000M | $20.00M |
| YoY Change | -100.0% | 200.0% | 100.0% |
| Pretax Income | $58.00M | -$33.00M | $125.0M |
| YoY Change | 0.0% | -194.29% | -38.73% |
| Income Tax | $15.00M | -$11.00M | $21.00M |
| % Of Pretax Income | 25.86% | 16.8% | |
| Net Earnings | $43.00M | -$22.00M | $105.0M |
| YoY Change | -8.51% | -184.62% | -25.53% |
| Net Earnings / Revenue | 8.6% | -5.46% | 5.8% |
| Basic Earnings Per Share | -$0.29 | $1.36 | |
| Diluted Earnings Per Share | $524.4K | -$0.29 | $1.35 |
| COMMON SHARES | |||
| Basic Shares Outstanding | 78.21M shares | 75.94M shares | 76.82M shares |
| Diluted Shares Outstanding | 75.94M shares | 77.39M shares |
Balance Sheet
| Concept | 2014 Q4 | 2013 Q2 | 2013 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $138.0M | $153.0M | $116.0M |
| YoY Change | 18.97% | 6.99% | 100.0% |
| Cash & Equivalents | $127.0M | $119.0M | $107.0M |
| Short-Term Investments | $11.00M | $34.00M | $9.000M |
| Other Short-Term Assets | $115.0M | $78.00M | $264.0M |
| YoY Change | 11.65% | 18.18% | -20.96% |
| Inventory | $82.00M | $72.00M | $65.00M |
| Prepaid Expenses | $39.00M | ||
| Receivables | $149.0M | $137.0M | $146.0M |
| Other Receivables | $0.00 | $0.00 | $0.00 |
| Total Short-Term Assets | $699.0M | $627.0M | $591.0M |
| YoY Change | 18.27% | -13.87% | -4.98% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $5.201B | $4.532B | $4.494B |
| YoY Change | 15.73% | 4.98% | 2.32% |
| Goodwill | |||
| YoY Change | |||
| Intangibles | |||
| YoY Change | |||
| Long-Term Investments | $69.00M | ||
| YoY Change | -2.82% | ||
| Other Assets | $48.00M | $49.00M | $630.0M |
| YoY Change | -2.04% | -15.52% | -3.96% |
| Total Long-Term Assets | $6.343B | $5.169B | $5.510B |
| YoY Change | 15.12% | 3.92% | 9.15% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $699.0M | $627.0M | $591.0M |
| Total Long-Term Assets | $6.343B | $5.169B | $5.510B |
| Total Assets | $7.042B | $5.796B | $6.101B |
| YoY Change | 15.42% | 1.65% | 7.6% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $156.0M | $107.0M | $173.0M |
| YoY Change | -9.83% | 62.12% | 76.53% |
| Accrued Expenses | $131.0M | $130.0M | $127.0M |
| YoY Change | 3.15% | -4.41% | 1.6% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $0.00 | $0.00 | $0.00 |
| YoY Change | -100.0% | ||
| Long-Term Debt Due | $375.0M | $50.00M | $0.00 |
| YoY Change | -66.67% | -100.0% | |
| Total Short-Term Liabilities | $873.0M | $435.0M | $393.0M |
| YoY Change | 122.14% | -23.14% | -24.57% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $2.126B | $1.686B | $1.916B |
| YoY Change | 10.96% | 6.31% | 24.74% |
| Other Long-Term Liabilities | $21.00M | $18.00M | $1.386B |
| YoY Change | -16.0% | -82.0% | 7.03% |
| Total Long-Term Liabilities | $2.147B | $1.704B | $3.302B |
| YoY Change | 10.61% | 1.07% | 16.64% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $873.0M | $435.0M | $393.0M |
| Total Long-Term Liabilities | $2.147B | $1.704B | $3.302B |
| Total Liabilities | $5.131B | $4.034B | $4.282B |
| YoY Change | 19.86% | 0.82% | 8.63% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | $1.000B | $878.0M | |
| YoY Change | 9.53% | 1.27% | |
| Common Stock | $918.0M | $889.0M | |
| YoY Change | 0.77% | 6.21% | |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | |||
| YoY Change | |||
| Treasury Stock Shares | |||
| Shareholders Equity | $1.911B | $1.761B | $1.819B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $7.042B | $5.796B | $6.101B |
| YoY Change | 15.42% | 1.65% | 7.6% |
Cashflow Statement
| Concept | 2014 Q4 | 2013 Q2 | 2013 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $43.00M | -$22.00M | $105.0M |
| YoY Change | -8.51% | -184.62% | -25.53% |
| Depreciation, Depletion And Amortization | $77.00M | $62.00M | $248.0M |
| YoY Change | 24.19% | -1.59% | 0.0% |
| Cash From Operating Activities | $45.00M | $114.0M | $544.0M |
| YoY Change | -47.06% | -27.39% | 10.12% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | -$183.0M | -$152.0M | $656.0M |
| YoY Change | -9.85% | 123.53% | 116.5% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $10.00M | $0.00 | -$3.000M |
| YoY Change | 400.0% | -100.0% | 50.0% |
| Cash From Investing Activities | -$173.0M | -$152.0M | -$692.0M |
| YoY Change | -13.93% | 117.14% | 135.37% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | $84.00M | ||
| YoY Change | 3.7% | ||
| Common Stock Issuance & Retirement, Net | $47.00M | $67.00M | |
| YoY Change | |||
| Debt Paid & Issued, Net | $50.00M | $100.0M | |
| YoY Change | 0.0% | ||
| Cash From Financing Activities | 158.0M | 124.0M | $243.0M |
| YoY Change | 19.7% | -690.48% | -225.26% |
| NET CHANGE | |||
| Cash From Operating Activities | 45.00M | 114.0M | $544.0M |
| Cash From Investing Activities | -173.0M | -152.0M | -$692.0M |
| Cash From Financing Activities | 158.0M | 124.0M | $243.0M |
| Net Change In Cash | 30.00M | 86.00M | $95.00M |
| YoY Change | 87.5% | 30.3% | 1483.33% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $45.00M | $114.0M | $544.0M |
| Capital Expenditures | -$183.0M | -$152.0M | $656.0M |
| Free Cash Flow | $228.0M | $266.0M | -$112.0M |
| YoY Change | -20.83% | 18.22% | -158.64% |
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| CY2014Q4 | por |
Domestic Equity Securities
DomesticEquitySecurities
|
5000000 | USD |
| CY2015Q4 | por |
Domestic Equity Securities
DomesticEquitySecurities
|
5000000 | USD |
| CY2014Q4 | por |
Domestic Equity Securities Defined Benefit Pension Plan Assets
DomesticEquitySecuritiesDefinedBenefitPensionPlanAssets
|
188000000 | USD |
| CY2015Q4 | por |
Domestic Equity Securities Defined Benefit Pension Plan Assets
DomesticEquitySecuritiesDefinedBenefitPensionPlanAssets
|
176000000 | USD |
| CY2014Q4 | por |
Domestic Equity Securities Other Postretirement Benefit Plan Assets At Fair Value
DomesticEquitySecuritiesOtherPostretirementBenefitPlanAssetsAtFairValue
|
11000000 | USD |
| CY2015Q4 | por |
Domestic Equity Securities Other Postretirement Benefit Plan Assets At Fair Value
DomesticEquitySecuritiesOtherPostretirementBenefitPlanAssetsAtFairValue
|
10000000 | USD |
| CY2014Q4 | por |
Domestic Government And Corporate Credit Defined Benefit Pension Plan Assets
DomesticGovernmentAndCorporateCreditDefinedBenefitPensionPlanAssets
|
197000000 | USD |
| CY2015Q4 | por |
Domestic Government And Corporate Credit Defined Benefit Pension Plan Assets
DomesticGovernmentAndCorporateCreditDefinedBenefitPensionPlanAssets
|
177000000 | USD |
| CY2015 | por |
Employee Stock Purchase Plan Base Pay Threshold
EmployeeStockPurchasePlanBasePayThreshold
|
0.10 | |
| CY2015Q4 | por |
Employee Stock Purchase Plan Number Of Available Shares
EmployeeStockPurchasePlanNumberOfAvailableShares
|
397265 | shares |
| CY2015 | por |
Employee Stock Purchase Plan Purchase Price
EmployeeStockPurchasePlanPurchasePrice
|
0.95 | |
| CY2015 | por |
Employee Stock Purchase Plan Purchased Stock Value Limitation
EmployeeStockPurchasePlanPurchasedStockValueLimitation
|
25000 | USD |
| CY2015 | por |
Employee Stock Purchase Plan Share Purchase Limitation
EmployeeStockPurchasePlanSharePurchaseLimitation
|
1500 | shares |
| CY2015Q4 | por |
Employee Stock Purchase Plan Shares Authorized
EmployeeStockPurchasePlanSharesAuthorized
|
625000 | shares |
| CY2015 | por |
Estimated Average Service Life Hydro Production Plant
EstimatedAverageServiceLifeHydroProductionPlant
|
95 | |
| CY2015 | por |
Estimated Average Service Life Wind Production Plant
EstimatedAverageServiceLifeWindProductionPlant
|
30 | |
| CY2015 | por |
Estimated Average Service Lives Distribution Plant
EstimatedAverageServiceLivesDistributionPlant
|
45 | |
| CY2015 | por |
Estimated Average Service Lives General Plant
EstimatedAverageServiceLivesGeneralPlant
|
12 | |
| CY2015 | por |
Estimated Average Service Lives Transmission Plant
EstimatedAverageServiceLivesTransmissionPlant
|
57 | |
| CY2015 | por |
Estimated Remaining Useful Life Of Facility Acquired
EstimatedRemainingUsefulLifeOfFacilityAcquired
|
0.75 | |
| CY2013 | por |
Expensesrelatedto Cascade Crossing
ExpensesrelatedtoCascadeCrossing
|
52000000 | USD |
| CY2014 | por |
Expensesrelatedto Cascade Crossing
ExpensesrelatedtoCascadeCrossing
|
0 | USD |
| CY2015 | por |
Expensesrelatedto Cascade Crossing
ExpensesrelatedtoCascadeCrossing
|
0 | USD |
| CY2015Q4 | por |
Fair Value Money Market Funds
FairValueMoneyMarketFunds
|
1000000 | USD |
| CY2014Q4 | por |
Fair Value Of Money Market Funds Other Post Retirement Benefit Plan Assets At Fair Value
FairValueOfMoneyMarketFundsOtherPostRetirementBenefitPlanAssetsAtFairValue
|
6000000 | USD |
| CY2015Q4 | por |
Fair Value Of Money Market Funds Other Post Retirement Benefit Plan Assets At Fair Value
FairValueOfMoneyMarketFundsOtherPostRetirementBenefitPlanAssetsAtFairValue
|
7000000 | USD |
| CY2015 | por |
Ferc Authorized Short Term Debt Effective Through February62014
FercAuthorizedShortTermDebtEffectiveThroughFebruary62014
|
900000000 | USD |
| CY2015Q4 | por |
First Mortgage Bonds Maximum Rate
FirstMortgageBondsMaximumRate
|
0.0931 | |
| CY2015Q4 | por |
First Mortgage Bonds Minimum Rate
FirstMortgageBondsMinimumRate
|
0.0346 | |
| CY2013 | por |
Franchise Taxes
FranchiseTaxes
|
41000000 | USD |
| CY2014 | por |
Franchise Taxes
FranchiseTaxes
|
42000000 | USD |
| CY2015 | por |
Franchise Taxes
FranchiseTaxes
|
43000000 | USD |
| CY2015Q4 | por |
Incorporated Cities
IncorporatedCities
|
52 | |
| CY1985Q4 | por |
Interestin Pacific Northwest Intertie
InterestinPacificNorthwestIntertie
|
0.10714 | |
| CY2014Q4 | por |
International Equity Securities
InternationalEquitySecurities
|
1000000 | USD |
| CY2015Q4 | por |
International Equity Securities
InternationalEquitySecurities
|
0 | USD |
| CY2014Q4 | por |
International Equity Securities Defined Benefit Pension Plan Assets
InternationalEquitySecuritiesDefinedBenefitPensionPlanAssets
|
171000000 | USD |
| CY2015Q4 | por |
International Equity Securities Defined Benefit Pension Plan Assets
InternationalEquitySecuritiesDefinedBenefitPensionPlanAssets
|
170000000 | USD |
| CY2014Q4 | por |
International Equity Securities Other Post Retirement Assets At Fair Value
InternationalEquitySecuritiesOtherPostRetirementAssetsAtFairValue
|
10000000 | USD |
| CY2015Q4 | por |
International Equity Securities Other Post Retirement Assets At Fair Value
InternationalEquitySecuritiesOtherPostRetirementAssetsAtFairValue
|
8000000 | USD |
| CY1993Q4 | por |
Investment In Trojan
InvestmentInTrojan
|
0.87 | |
| CY2015 | por |
Jointly Owned Plant Boardman Plant In Service Year
JointlyOwnedPlantBoardmanPlantInServiceYear
|
1980 | |
| CY2015 | por |
Jointly Owned Plant Colstrip Plant In Service Year
JointlyOwnedPlantColstripPlantInServiceYear
|
1986 | |
| CY2015 | por |
Jointly Owned Plant Peltonin Service Year
JointlyOwnedPlantPeltoninServiceYear
|
1958 | |
| CY2015 | por |
Jointly Owned Plant Round Buttein Service Year
JointlyOwnedPlantRoundButteinServiceYear
|
1964 | |
| CY2015Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Boardman Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfBoardmanPlantInService
|
512000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Colstrip Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfColstripPlantInService
|
519000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Peltonround Butte Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfPeltonroundButtePlantInService
|
244000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Boardman Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfBoardmanPlantAccumulatedDepreciation
|
375000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Colstrip Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfColstripPlantAccumulatedDepreciation
|
337000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Boardman
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressBoardman
|
0 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Colstrip
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressColstrip
|
4000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Peltonround Butte
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressPeltonroundButte
|
5000000 | USD |
| CY2015Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Peltonround Butte Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfPeltonroundButtePlantAccumulatedDepreciation
|
58000000 | USD |
| CY2013Q3 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Boardman
JointlyOwnedUtilityPlantProportionateOwnershipShareOfBoardman
|
0.65 | |
| CY2013Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Boardman
JointlyOwnedUtilityPlantProportionateOwnershipShareOfBoardman
|
0.80 | |
| CY2015Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Boardman
JointlyOwnedUtilityPlantProportionateOwnershipShareOfBoardman
|
0.9000 | |
| CY2015Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Colstrip
JointlyOwnedUtilityPlantProportionateOwnershipShareOfColstrip
|
0.2000 | |
| CY2015Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Peltonround Butte
JointlyOwnedUtilityPlantProportionateOwnershipShareOfPeltonroundButte
|
0.6667 | |
| CY2013Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Shareof Boardmantransferred
JointlyOwnedUtilityPlantProportionateOwnershipShareofBoardmantransferred
|
0.15 | |
| CY2014Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Shareof Boardmantransferred
JointlyOwnedUtilityPlantProportionateOwnershipShareofBoardmantransferred
|
0.10 | |
| CY1985Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Shareof Boardmantransferred
JointlyOwnedUtilityPlantProportionateOwnershipShareofBoardmantransferred
|
0.15 | |
| CY2015Q4 | por |
Letterofcreditfacility
Letterofcreditfacility
|
160000000 | USD |
| CY2014 | por |
Level3 Realized And Unrealized Losses Offset By Effect Of Regulatory Accounting
Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting
|
12000000 | USD |
| CY2015 | por |
Level3 Realized And Unrealized Losses Offset By Effect Of Regulatory Accounting
Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting
|
80000000 | USD |
| CY2015 | por |
Line Of Credit Facitlity Covenant Terms One Month Term
LineOfCreditFacitlityCovenantTermsOneMonthTerm
|
one | |
| CY2015 | por |
Line Of Credit Facitlity Covenant Terms Six Month Term
LineOfCreditFacitlityCovenantTermsSixMonthTerm
|
six | |
| CY2015 | por |
Line Of Credit Facitlity Covenant Terms Three Month Term
LineOfCreditFacitlityCovenantTermsThreeMonthTerm
|
three | |
| CY2015 | por |
Line Of Credit Facitlity Covenant Terms Two Month Term
LineOfCreditFacitlityCovenantTermsTwoMonthTerm
|
two | |
| CY2014Q4 | por |
Long Term Debt First Mortgage Bonds
LongTermDebtFirstMortgageBonds
|
2075000000 | USD |
| CY2015Q4 | por |
Long Term Debt First Mortgage Bonds
LongTermDebtFirstMortgageBonds
|
2083000000 | USD |
| CY2015Q4 | por |
Long Term Pollution Control Bond Rate
LongTermPollutionControlBondRate
|
0.05 | |
| CY2015 | por |
Maximum Percentage Of Output Possibley Allocated
MaximumPercentageOfOutputPossibleyAllocated
|
0.25 | |
| CY2014Q4 | por |
Money Market Funds Defined Benefit Pension Plan Assets
MoneyMarketFundsDefinedBenefitPensionPlanAssets
|
6000000 | USD |
| CY2015Q4 | por |
Money Market Funds Defined Benefit Pension Plan Assets
MoneyMarketFundsDefinedBenefitPensionPlanAssets
|
5000000 | USD |
| CY2015 | por |
Net Actuarial Loss Portion Of Amortization From Aocl For Non Qualified Benefits
NetActuarialLossPortionOfAmortizationFromAoclForNonQualifiedBenefits
|
1000000 | USD |
| CY2015 | por |
Net Actuarial Loss Portion Of Amortization From Aocl For Pension Benefits
NetActuarialLossPortionOfAmortizationFromAoclForPensionBenefits
|
14000000 | USD |
| CY2015 | por |
Net Actuarial Loss Portion Of Amortiztion Of Aocl For Other Postretirement Benefits
NetActuarialLossPortionOfAmortiztionOfAoclForOtherPostretirementBenefits
|
1000000 | USD |
| CY2013 | por |
Net Gain Or Loss Recognized In Statement Of Income Offset By Regulatory Accounting
NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting
|
120000000 | USD |
| CY2014 | por |
Net Gain Or Loss Recognized In Statement Of Income Offset By Regulatory Accounting
NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting
|
83000000 | USD |
| CY2015 | por |
Net Gain Or Loss Recognized In Statement Of Income Offset By Regulatory Accounting
NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting
|
160000000 | USD |
| CY2013Q4 | por |
Net Liabilities From Price Risk Management Activities Classified As Level3
NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3
|
139000000 | USD |
| CY2014Q4 | por |
Net Liabilities From Price Risk Management Activities Classified As Level3
NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3
|
100000000 | USD |
| CY2015Q4 | por |
Net Liabilities From Price Risk Management Activities Classified As Level3
NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3
|
119000000 | USD |
| CY2014 | por |
Net Realized Losses
NetRealizedLosses
|
3000000 | USD |
| CY2013 | por |
Net Taxes On Change In Compensation Retirement Benefits Liability And Amortization
NetTaxesOnChangeInCompensationRetirementBenefitsLiabilityAndAmortization
|
-1000000 | USD |
| CY2014 | por |
Net Taxes On Change In Compensation Retirement Benefits Liability And Amortization
NetTaxesOnChangeInCompensationRetirementBenefitsLiabilityAndAmortization
|
2000000 | USD |
| CY2014Q4 | por |
Noncurrent Derivative Liabilities
NoncurrentDerivativeLiabilities
|
122000000 | USD |
| CY2015Q4 | por |
Noncurrent Derivative Liabilities
NoncurrentDerivativeLiabilities
|
161000000 | USD |
| CY2015Q4 | por |
Number Of Retail Customers
NumberOfRetailCustomers
|
852164 | shares |
| CY2015Q4 | por |
Number Of Union Employees
NumberOfUnionEmployees
|
764 | shares |
| CY2015Q4 | por |
Number Of Union Employees Subject To Agreement A
NumberOfUnionEmployeesSubjectToAgreementA
|
713 | shares |
| CY2015Q4 | por |
Number Of Union Employees Subject To Agreement B
NumberOfUnionEmployeesSubjectToAgreementB
|
51 | shares |
| CY2014 | por |
Numberof Years
NumberofYears
|
3 | |
| CY2015 | por |
Numberof Years
NumberofYears
|
3 | |
| CY2014Q4 | por |
Other Current Liabilities Other
OtherCurrentLiabilitiesOther
|
54000000 | USD |
| CY2015Q4 | por |
Other Current Liabilities Other
OtherCurrentLiabilitiesOther
|
75000000 | USD |
| CY2014Q4 | por |
Other Post Retirement Benefit Plan Assets Total
OtherPostRetirementBenefitPlanAssetsTotal
|
32000000 | USD |
| CY2015Q4 | por |
Other Post Retirement Benefit Plan Assets Total
OtherPostRetirementBenefitPlanAssetsTotal
|
30000000 | USD |
| CY2014Q4 | por |
Otherpostretirementdefinedbenefitplanliabilitycurrent
Otherpostretirementdefinedbenefitplanliabilitycurrent
|
2000000 | USD |
| CY2015Q4 | por |
Otherpostretirementdefinedbenefitplanliabilitycurrent
Otherpostretirementdefinedbenefitplanliabilitycurrent
|
2000000 | USD |
| CY2015Q4 | por |
Percent Of States Population
PercentOfStatesPopulation
|
0.46 | |
| CY2015 | por |
Performancebasedstockawardpercentagemaximum
Performancebasedstockawardpercentagemaximum
|
1.50 | |
| CY2015 | por |
Performancebasedstockawardpercentageminimum
Performancebasedstockawardpercentageminimum
|
0 | |
| CY2014Q4 | por |
Pollution Control Revenue Bonds Owned By Pge
PollutionControlRevenueBondsOwnedByPge
|
21000000 | USD |
| CY2015Q4 | por |
Pollution Control Revenue Bonds Owned By Pge
PollutionControlRevenueBondsOwnedByPge
|
21000000 | USD |
| CY2015 | por |
Power Cost Deadband Lower Threshold
PowerCostDeadbandLowerThreshold
|
15000000 | USD |
| CY2015 | por |
Power Cost Deadband Upper Threshold
PowerCostDeadbandUpperThreshold
|
30000000 | USD |
| CY2013 | por |
Preliminary Engineering Transferred To Construction Work In Progress
PreliminaryEngineeringTransferredToConstructionWorkInProgress
|
9000000 | USD |
| CY2014 | por |
Preliminary Engineering Transferred To Construction Work In Progress
PreliminaryEngineeringTransferredToConstructionWorkInProgress
|
0 | USD |
| CY2015 | por |
Preliminary Engineering Transferred To Construction Work In Progress
PreliminaryEngineeringTransferredToConstructionWorkInProgress
|
0 | USD |
| CY2014Q4 | por |
Private Equity Funds
PrivateEquityFunds
|
29000000 | USD |
| CY2015Q4 | por |
Private Equity Funds
PrivateEquityFunds
|
22000000 | USD |
| CY2015 | por |
Projectsaddedtoplaintiffssuit
Projectsaddedtoplaintiffssuit
|
2 | claims |
| CY2015Q4 | por |
Projectsencompassedbysuit
Projectsencompassedbysuit
|
40 | claims |
| CY2014Q4 | por |
Public Utilities Property Plant And Equipment General
PublicUtilitiesPropertyPlantAndEquipmentGeneral
|
426000000 | USD |
| CY2015Q4 | por |
Public Utilities Property Plant And Equipment General
PublicUtilitiesPropertyPlantAndEquipmentGeneral
|
463000000 | USD |
| CY2014Q4 | por |
Public Utilities Property Plant And Equipment Intangible
PublicUtilitiesPropertyPlantAndEquipmentIntangible
|
478000000 | USD |
| CY2015Q4 | por |
Public Utilities Property Plant And Equipment Intangible
PublicUtilitiesPropertyPlantAndEquipmentIntangible
|
556000000 | USD |
| CY2014 | por |
Realized And Unrealized Gains And Losses Net Commodity Contract
RealizedAndUnrealizedGainsAndLossesNetCommodityContract
|
15000000 | USD |
| CY2015 | por |
Realized And Unrealized Gains And Losses Net Commodity Contract
RealizedAndUnrealizedGainsAndLossesNetCommodityContract
|
80000000 | USD |
| CY2013 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Electricity
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity
|
78000000 | USD |
| CY2014 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Electricity
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity
|
13000000 | USD |
| CY2015 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Electricity
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity
|
72000000 | USD |
| CY2013 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Foreign Currency
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency
|
1000000 | USD |
| CY2014 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Foreign Currency
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency
|
0 | USD |
| CY2015 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Foreign Currency
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency
|
1000000 | USD |
| CY2013 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Natural Gas
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas
|
28000000 | USD |
| CY2014 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Natural Gas
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas
|
72000000 | USD |
| CY2015 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Natural Gas
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas
|
103000000 | USD |
| CY2008Q3 | por |
Refund To Customers For Trojan Investment Including Interest
RefundToCustomersForTrojanInvestmentIncludingInterest
|
33000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Rate Of Return At Approved Rate
RegulatoryAssetsEarningRateOfReturnAtApprovedRate
|
4000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Rate Of Return At Cost Of Capital
RegulatoryAssetsEarningRateOfReturnAtCostOfCapital
|
1000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Rate Of Return By Inclusion In Rate Base
RegulatoryAssetsEarningRateOfReturnByInclusionInRateBase
|
25000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Return
RegulatoryAssetsEarningReturn
|
30000000 | USD |
| CY2014Q4 | por |
Regulatory Assets Earning Return Other Category
RegulatoryAssetsEarningReturnOtherCategory
|
33000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Return Other Category
RegulatoryAssetsEarningReturnOtherCategory
|
29000000 | USD |
| CY2014Q4 | por |
Regulatory Assets From Price Risk Management Activities
RegulatoryAssetsFromPriceRiskManagementActivities
|
6000000 | USD |
| CY2015Q4 | por |
Regulatory Assets From Price Risk Management Activities
RegulatoryAssetsFromPriceRiskManagementActivities
|
10000000 | USD |
| CY2015 | por |
Remaining Recovery Periodof Regulatory Asset Debt Issuance Costs
RemainingRecoveryPeriodofRegulatoryAssetDebtIssuanceCosts
|
8 years | |
| CY2015 | por |
Remaining Recovery Periodof Regulatory Assets Price Risk Management
RemainingRecoveryPeriodofRegulatoryAssetsPriceRiskManagement
|
4 years | |
| CY2015 | por |
Remainingrecoveryperiodofregulatoryassetsdeferredcapitalprojects
Remainingrecoveryperiodofregulatoryassetsdeferredcapitalprojects
|
1 year | |
| CY2015 | por |
Remainingrefundperiodofregulatoryliability Trojandecommissioningactivities
RemainingrefundperiodofregulatoryliabilityTrojandecommissioningactivities
|
3 years | |
| CY2015Q4 | por |
Remarketable Pollution Control Bonds
RemarketablePollutionControlBonds
|
21000000 | USD |
| CY2009 | por |
Revenueoverstatment
Revenueoverstatment
|
1000000 | USD |
| CY2010 | por |
Revenueoverstatment
Revenueoverstatment
|
2000000 | USD |
| CY2011 | por |
Revenueoverstatment
Revenueoverstatment
|
3000000 | USD |
| CY2012 | por |
Revenueoverstatment
Revenueoverstatment
|
3000000 | USD |
| CY2013 | por |
Revenueoverstatment
Revenueoverstatment
|
9000000 | USD |
| CY2015Q4 | por |
Service Area Population
ServiceAreaPopulation
|
1800000 | shares |
| CY2015Q4 | por |
Service Area Sq Miles
ServiceAreaSqMiles
|
4000 | sqmi |
| CY2013 | por |
Short Term Debt Maximum Amount Outstanding During Year
ShortTermDebtMaximumAmountOutstandingDuringYear
|
54000000 | USD |
| CY2014 | por |
Short Term Debt Maximum Amount Outstanding During Year
ShortTermDebtMaximumAmountOutstandingDuringYear
|
0 | USD |
| CY2015 | por |
Short Term Debt Maximum Amount Outstanding During Year
ShortTermDebtMaximumAmountOutstandingDuringYear
|
11000000 | USD |
| CY2013 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.117 | |
| CY2014 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.324 | |
| CY2015 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.301 | |
| CY2015 | por |
Stock Based Compensation Forfeiture Rate
StockBasedCompensationForfeitureRate
|
0.05 | |
| CY2013 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2014 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2015 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2013Q2 | por |
Stockoffering
Stockoffering
|
11100000 | shares |
| CY2014 | por |
Stockoffering
Stockoffering
|
700000 | shares |
| CY2015Q2 | por |
Stockoffering
Stockoffering
|
10400000 | shares |
| CY2015Q4 | por |
Tax Credit Carryforward Federal
TaxCreditCarryforwardFederal
|
42000000 | USD |
| CY2015Q4 | por |
Tax Credit Carryforward State
TaxCreditCarryforwardState
|
4000000 | USD |
| CY2014Q4 | por |
Trojan Decommissioning Activities
TrojanDecommissioningActivities
|
41000000 | USD |
| CY2015Q4 | por |
Trojan Decommissioning Activities
TrojanDecommissioningActivities
|
43000000 | USD |
| CY2014Q4 | por |
Unbilled Revenue
UnbilledRevenue
|
93000000 | USD |
| CY2015Q4 | por |
Unbilled Revenue
UnbilledRevenue
|
95000000 | USD |
| CY2015Q4 | por |
Unsecuredtermbankloanratemaximum
Unsecuredtermbankloanratemaximum
|
0.0093 | |
| CY2015Q4 | por |
Unsecuredtermbankloanrateminimum
Unsecuredtermbankloanrateminimum
|
0.0086 | |
| CY2014Q4 | por |
Volume Related To Derivative Instruments At Balance Sheet Date Commodity Contracts Natural Gas
VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas
|
127000000 | MMBTU |
| CY2015Q4 | por |
Volume Related To Derivative Instruments At Balance Sheet Date Commodity Contracts Natural Gas
VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas
|
124000000 | MMBTU |
| CY2014Q4 | por |
Volume Related To Derivative Instruments Held At Balance Sheet Date Commodity Contracts Electricity
VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity
|
16000000 | MWh |
| CY2015Q4 | por |
Volume Related To Derivative Instruments Held At Balance Sheet Date Commodity Contracts Electricity
VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity
|
12000000 | MWh |
| CY2014Q4 | por |
Volume Relatedto Derivative Instruments Heldat Balance Sheet Date Foreign Currency
VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency
|
7000000 | CAD |
| CY2015Q4 | por |
Volume Relatedto Derivative Instruments Heldat Balance Sheet Date Foreign Currency
VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency
|
7000000 | CAD |
| CY2013 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2014 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2015 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2014Q4 | us-gaap |
Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
|
156000000 | USD |
| CY2015Q4 | us-gaap |
Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
|
98000000 | USD |
| CY2014Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
149000000 | USD |
| CY2015Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
158000000 | USD |
| CY2014Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-7000000 | USD |
| CY2015Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-8000000 | USD |
| CY2013 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
2000000 | USD |
| CY2014 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
1000000 | USD |
| CY2015 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
2000000 | USD |
| CY2013 | us-gaap |
Adjustments To Additional Paid In Capital Stock Issued Issuance Costs
AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
|
3000000 | USD |
| CY2015 | us-gaap |
Adjustments To Additional Paid In Capital Stock Issued Issuance Costs
AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
|
12000000 | USD |
| CY2012Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
5000000 | USD |
| CY2013Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
6000000 | USD |
| CY2014Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
6000000 | USD |
| CY2015Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
6000000 | USD |
| CY2013 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
5000000 | USD |
| CY2014 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
6000000 | USD |
| CY2015 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
6000000 | USD |
| CY2013 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
22000000 | USD |
| CY2014 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
25000000 | USD |
| CY2015 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
38000000 | USD |
| CY2012Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
94000000 | USD |
| CY2013Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
100000000 | USD |
| CY2014Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
116000000 | USD |
| CY2015Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
151000000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
6000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
6000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
7000000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
4000000 | USD |
| CY2014Q4 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
7000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
15000000 | USD |
| CY2015Q4 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
4000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
2000000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
4000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
3000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
4000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Period Increase Decrease
AssetRetirementObligationPeriodIncreaseDecrease
|
33000000 | USD |
| CY2013 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
0 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
-2000000 | USD |
| CY2015Q4 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
9000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
30000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligations Significant Changes
AssetRetirementObligationsSignificantChanges
|
17 | |
| CY2014Q4 | us-gaap |
Assets
Assets
|
7042000000 | USD |
| CY2015Q4 | us-gaap |
Assets
Assets
|
7221000000 | USD |
| CY2014Q4 | us-gaap |
Assets Current
AssetsCurrent
|
699000000 | USD |
| CY2015Q4 | us-gaap |
Assets Current
AssetsCurrent
|
557000000 | USD |
| CY2014Q4 | us-gaap |
Assets Held In Trust Noncurrent
AssetsHeldInTrustNoncurrent
|
32000000 | USD |
| CY2015Q4 | us-gaap |
Assets Held In Trust Noncurrent
AssetsHeldInTrustNoncurrent
|
33000000 | USD |
| CY2014 | us-gaap |
Available For Sale Securities Gross Realized Gain Loss Net
AvailableForSaleSecuritiesGrossRealizedGainLossNet
|
3000000 | USD |
| CY2015 | us-gaap |
Available For Sale Securities Gross Realized Gain Loss Net
AvailableForSaleSecuritiesGrossRealizedGainLossNet
|
4000000 | USD |
| CY2014Q4 | us-gaap |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
|
6000000 | USD |
| CY2014Q4 | us-gaap |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Equipment
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment
|
7000000 | USD |
| CY2015Q4 | us-gaap |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Financial Liabilities
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialLiabilities
|
2000000 | USD |
| CY2014Q4 | us-gaap |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Inventory
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
|
4000000 | USD |
| CY2014Q4 | us-gaap |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities
BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
|
4000000 | USD |
| CY2013 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
84000000 | USD |
| CY2014 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
70000000 | USD |
| CY2015 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
32000000 | USD |
| CY2013 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
0 | USD |
| CY2014 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
8000000 | USD |
| CY2015 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
0 | USD |
| CY2012Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
12000000 | USD |
| CY2013Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
107000000 | USD |
| CY2014Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
127000000 | USD |
| CY2015Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
4000000 | USD |
| CY2013 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
95000000 | USD |
| CY2014 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
20000000 | USD |
| CY2015 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
-123000000 | USD |
| CY2015Q4 | us-gaap |
Collateral Already Posted Aggregate Fair Value
CollateralAlreadyPostedAggregateFairValue
|
80000000 | USD |
| CY2014Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
0 | USD |
| CY2015Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
6000000 | USD |
| CY2014Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2015Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2013 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.095 | |
| CY2014 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.115 | |
| CY2015 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.180 | |
| CY2014Q4 | us-gaap |
Common Stock No Par Value
CommonStockNoParValue
|
0 | |
| CY2015Q4 | us-gaap |
Common Stock No Par Value
CommonStockNoParValue
|
0 | |
| CY2014Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
160000000 | shares |
| CY2015Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
160000000 | shares |
| CY2014Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
78228339 | shares |
| CY2015Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
88792751 | shares |
| CY2014Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
78228339 | shares |
| CY2015Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
88792751 | shares |
| CY2014Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
918000000 | USD |
| CY2015Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
1196000000 | USD |
| CY2013 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
106000000 | USD |
| CY2014 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
173000000 | USD |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
171000000 | USD |
| CY2013 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
105000000 | USD |
| CY2014 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
172000000 | USD |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
171000000 | USD |
| CY2015Q4 | us-gaap |
Construction In Progress Gross
ConstructionInProgressGross
|
424000000 | USD |
| CY2015Q4 | us-gaap |
Contractual Obligation
ContractualObligation
|
2000000 | USD |
| CY2013 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
757000000 | USD |
| CY2014 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
713000000 | USD |
| CY2015 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
661000000 | USD |
| CY2013 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1604000000 | USD |
| CY2014 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1607000000 | USD |
| CY2015 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1589000000 | USD |
| CY2013 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
10000000 | USD |
| CY2014 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
20000000 | USD |
| CY2015 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
4000000 | USD |
| CY2013 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
10000000 | USD |
| CY2014 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
22000000 | USD |
| CY2015 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
5000000 | USD |
| CY2013 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
0 | USD |
| CY2014 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
2000000 | USD |
| CY2015 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
1000000 | USD |
| CY2015 | us-gaap |
Debt Instrument Covenant Description
DebtInstrumentCovenantDescription
|
.65 | |
| CY2015Q1 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0346 | |
| CY2015Q2 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0680 | |
| CY2015Q2 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.035 | |
| CY2015Q1 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0355 | |
| CY2014Q4 | us-gaap |
Debt Weighted Average Interest Rate
DebtWeightedAverageInterestRate
|
0.0542 | |
| CY2015Q4 | us-gaap |
Debt Weighted Average Interest Rate
DebtWeightedAverageInterestRate
|
0.0529 | |
| CY2014Q4 | us-gaap |
Decommissioning Trust Assets Amount
DecommissioningTrustAssetsAmount
|
90000000 | USD |
| CY2015Q4 | us-gaap |
Decommissioning Trust Assets Amount
DecommissioningTrustAssetsAmount
|
40000000 | USD |
| CY2013 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
4000000 | USD |
| CY2014 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
26000000 | USD |
| CY2015 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
26000000 | USD |
| CY2013 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
11000000 | USD |
| CY2014 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
39000000 | USD |
| CY2015 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
40000000 | USD |
| CY2013 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
7000000 | USD |
| CY2014 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
13000000 | USD |
| CY2015 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
14000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
311000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
370000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Net Current
DeferredTaxAssetsNetCurrent
|
33000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Net Current
DeferredTaxAssetsNetCurrent
|
0 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Regulatory Assets And Liabilities
DeferredTaxAssetsRegulatoryAssetsAndLiabilities
|
48000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Regulatory Assets And Liabilities
DeferredTaxAssetsRegulatoryAssetsAndLiabilities
|
42000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
|
161000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
|
170000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
1000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
0 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
0 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
0 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
592000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
632000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities Gross Noncurrent
DeferredTaxLiabilitiesGrossNoncurrent
|
903000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Gross Noncurrent
DeferredTaxLiabilitiesGrossNoncurrent
|
1002000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
625000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
632000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
0 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
1000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
693000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
781000000 | USD |
| CY2014Q4 | us-gaap |
Deferred Tax Liabilities Regulatory Assets
DeferredTaxLiabilitiesRegulatoryAssets
|
210000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Regulatory Assets
DeferredTaxLiabilitiesRegulatoryAssets
|
220000000 | USD |
| CY2015 | us-gaap |
Defined Benefit Plan Amount To Be Amortized From Accumulated Other Comprehensive Income Loss Next Fiscal Year
DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
|
16000000 | USD |
| CY2014Q3 | us-gaap |
Defined Benefit Plan Benefits Paid
DefinedBenefitPlanBenefitsPaid
|
16000000 | USD |
| CY2015 | us-gaap |
Defined Benefit Plan Description Of Direction And Pattern Of Change For Assumed Health Care Cost Trend Rate
DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate
|
0.06 | |
| CY2015 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation
|
0 | USD |
| CY2015 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents
|
0 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter
DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
|
262000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months
DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
|
44000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Five
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
|
49000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Four
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
|
49000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Three
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
|
47000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Two
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
|
45000000 | USD |
| CY2014Q4 | us-gaap |
Defined Benefit Plan Fair Value Of Plan Assets
DefinedBenefitPlanFairValueOfPlanAssets
|
591000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Fair Value Of Plan Assets
DefinedBenefitPlanFairValueOfPlanAssets
|
550000000 | USD |
| CY2013 | us-gaap |
Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year
DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear
|
0.005 | |
| CY2014 | us-gaap |
Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year
DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear
|
0.005 | |
| CY2015 | us-gaap |
Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year
DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear
|
0.0025 | |
| CY2013 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate
DefinedBenefitPlanUltimateHealthCareCostTrendRate
|
0.05 | |
| CY2014 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate
DefinedBenefitPlanUltimateHealthCareCostTrendRate
|
0.05 | |
| CY2015 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate
DefinedBenefitPlanUltimateHealthCareCostTrendRate
|
0.05 | |
| CY2013 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
16000000 | USD |
| CY2014 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
16000000 | USD |
| CY2015 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
17000000 | USD |
| CY2015Q4 | us-gaap |
Deposit Assets
DepositAssets
|
14000000 | USD |
| CY2013 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
248000000 | USD |
| CY2014 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
301000000 | USD |
| CY2015 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
305000000 | USD |
| CY2014Q4 | us-gaap |
Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
|
1000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
|
0 | USD |
| CY2014Q4 | us-gaap |
Derivative Collateral Right To Reclaim Cash
DerivativeCollateralRightToReclaimCash
|
11000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Collateral Right To Reclaim Cash
DerivativeCollateralRightToReclaimCash
|
14000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Collateral Right To Reclaim Cash
DerivativeCollateralRightToReclaimCash
|
19000000 | USD |
| CY2014Q4 | us-gaap |
Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral
DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
|
72000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral
DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
|
111000000 | USD |
| CY2014Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
106000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
130000000 | USD |
| CY2014Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
122000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
161000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Net Liability Position Aggregate Fair Value
DerivativeNetLiabilityPositionAggregateFairValue
|
278000000 | USD |
| CY2013Q4 | us-gaap |
Disposal Group Including Discontinued Operation Consideration
DisposalGroupIncludingDiscontinuedOperationConsideration
|
1 | USD |
| CY2014Q4 | us-gaap |
Disposal Group Including Discontinued Operation Consideration
DisposalGroupIncludingDiscontinuedOperationConsideration
|
8000000 | USD |
| CY2014Q4 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
28000000 | USD |
| CY2013Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
22000000 | USD |
| CY2014Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
28000000 | USD |
| CY2013 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.36 | |
| CY2014 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.24 | |
| CY2015 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.05 | |
| CY2013 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.35 | |
| CY2014 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.18 | |
| CY2015 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.04 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.168 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.260 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.207 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.028 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
-0.023 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.000 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
-0.026 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.008 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.005 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.034 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.039 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.042 | |
| CY2013 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Other
EffectiveIncomeTaxRateReconciliationTaxCreditsOther
|
0.218 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Other
EffectiveIncomeTaxRateReconciliationTaxCreditsOther
|
0.114 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Other
EffectiveIncomeTaxRateReconciliationTaxCreditsOther
|
0.190 | |
| CY2013 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
225000000 | USD |
| CY2014 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
257000000 | USD |
| CY2015 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
266000000 | USD |
| CY2013 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1810000000 | USD |
| CY2014 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1900000000 | USD |
| CY2015 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1898000000 | USD |
| CY2014Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
51000000 | USD |
| CY2015Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
51000000 | USD |
| CY2013 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
0 | USD |
| CY2014 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
0 | USD |
| CY2015 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
0 | USD |
| CY2015Q4 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
6000000 | USD |
| CY2014Q4 | us-gaap |
Energy Related Inventory
EnergyRelatedInventory
|
40000000 | USD |
| CY2015Q4 | us-gaap |
Energy Related Inventory
EnergyRelatedInventory
|
39000000 | USD |
| CY2014 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
|
0 | USD |
| CY2015 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
|
0 | USD |
| CY2014 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
|
0 | USD |
| CY2015 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
|
0 | USD |
| CY2014 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
|
50000000 | USD |
| CY2015 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
|
61000000 | USD |
| CY2014 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
|
4000000 | USD |
| CY2015 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
|
0 | USD |
| CY2014Q4 | us-gaap |
Financial Instruments Owned At Fair Value
FinancialInstrumentsOwnedAtFairValue
|
103000000 | USD |
| CY2015Q4 | us-gaap |
Financial Instruments Owned At Fair Value
FinancialInstrumentsOwnedAtFairValue
|
57000000 | USD |
| CY2014Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
191000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
227000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
|
43000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
|
33000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
|
39000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
|
40000000 | USD |
| CY2013 | us-gaap |
Gain Loss From Price Risk Management Activity
GainLossFromPriceRiskManagementActivity
|
-18000000 | USD |
| CY2014 | us-gaap |
Gain Loss From Price Risk Management Activity
GainLossFromPriceRiskManagementActivity
|
45000000 | USD |
| CY2015 | us-gaap |
Gain Loss From Price Risk Management Activity
GainLossFromPriceRiskManagementActivity
|
60000000 | USD |
| CY2013 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-7000000 | USD |
| CY2014 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-10000000 | USD |
| CY2015 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-2000000 | USD |
| CY2013 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
219000000 | USD |
| CY2014 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
227000000 | USD |
| CY2015 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
241000000 | USD |
| CY2013 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
125000000 | USD |
| CY2014 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
235000000 | USD |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
217000000 | USD |
| CY2013 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
21000000 | USD |
| CY2014 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
61000000 | USD |
| CY2015 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
45000000 | USD |
| CY2013 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
10000000 | USD |
| CY2014 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
22000000 | USD |
| CY2015 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
3000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
14000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-13000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
6000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Customer Advances And Deposits
IncreaseDecreaseInCustomerAdvancesAndDeposits
|
1000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Customer Advances And Deposits
IncreaseDecreaseInCustomerAdvancesAndDeposits
|
13000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Customer Advances And Deposits
IncreaseDecreaseInCustomerAdvancesAndDeposits
|
-1000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-6000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-8000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-9000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
-37000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
2000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
22000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
15000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
16000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
7000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
|
-17000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
|
12000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
|
4000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
0 | USD |
| CY2014 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
0 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
-23000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
|
6000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
|
0 | USD |
| CY2015 | us-gaap |
Increase Decrease In Over Under Energy Recovery
IncreaseDecreaseInOverUnderEnergyRecovery
|
0 | USD |
| CY2013 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
0 | USD |
| CY2014 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
-8000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
11000000 | USD |
| CY2013 | us-gaap |
Increase Decrease In Risk Management Assets And Liabilities
IncreaseDecreaseInRiskManagementAssetsAndLiabilities
|
18000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Risk Management Assets And Liabilities
IncreaseDecreaseInRiskManagementAssetsAndLiabilities
|
-45000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Risk Management Assets And Liabilities
IncreaseDecreaseInRiskManagementAssetsAndLiabilities
|
-60000000 | USD |
| CY2013 | us-gaap |
Interest Expense
InterestExpense
|
101000000 | USD |
| CY2014 | us-gaap |
Interest Expense
InterestExpense
|
96000000 | USD |
| CY2015 | us-gaap |
Interest Expense
InterestExpense
|
114000000 | USD |
| CY2013 | us-gaap |
Interest Paid Net
InterestPaidNet
|
90000000 | USD |
| CY2014 | us-gaap |
Interest Paid Net
InterestPaidNet
|
86000000 | USD |
| CY2015 | us-gaap |
Interest Paid Net
InterestPaidNet
|
108000000 | USD |
| CY2014Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
26000000 | USD |
| CY2015Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
25000000 | USD |
| CY2015Q4 | us-gaap |
Jointly Owned Utility Plant Gross Ownership Amount Of Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
|
1275000000 | USD |
| CY2015Q4 | us-gaap |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
|
9000000 | USD |
| CY2015Q4 | us-gaap |
Jointly Owned Utility Plant Ownership Amount Of Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
|
770000000 | USD |
| CY2013 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
9000000 | USD |
| CY2014 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
11000000 | USD |
| CY2015 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
10000000 | USD |
| CY2014Q4 | us-gaap |
Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
|
30000000 | USD |
| CY2015Q4 | us-gaap |
Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
|
63000000 | USD |
| CY2014Q4 | us-gaap |
Liabilities
Liabilities
|
5131000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities
Liabilities
|
4963000000 | USD |
| CY2014Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
7042000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
7221000000 | USD |
| CY2014Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
873000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
626000000 | USD |
| CY2014Q4 | us-gaap |
Liabilities Fair Value Disclosure
LiabilitiesFairValueDisclosure
|
228000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities Fair Value Disclosure
LiabilitiesFairValueDisclosure
|
291000000 | USD |
| CY2015 | us-gaap |
Limited Liability Company Llc Or Limited Partnership Lp Members Or Limited Partners Ownership Interest
LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
|
0.99 | |
| CY2015Q4 | us-gaap |
Line Of Credit
LineOfCredit
|
0 | USD |
| CY2015Q4 | us-gaap |
Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
|
500000000 | USD |
| CY2015Q4 | us-gaap |
Line Of Credit Facility Remaining Borrowing Capacity
LineOfCreditFacilityRemainingBorrowingCapacity
|
494000000 | USD |
| CY2014Q4 | us-gaap |
Long Term Debt
LongTermDebt
|
2501000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt
LongTermDebt
|
2204000000 | USD |
| CY2014Q4 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
375000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
133000000 | USD |
| CY2014Q4 | us-gaap |
Long Term Debt Fair Value
LongTermDebtFairValue
|
2901000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal After Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
|
1771000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
|
0 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
|
0 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Four
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
|
300000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
|
75000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
|
58000000 | USD |
| CY2014Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2126000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2071000000 | USD |
| CY2014Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
142000000 | USD |
| CY2015Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
142000000 | USD |
| CY2013Q3 | us-gaap |
Loss Contingency Damages Awarded Value
LossContingencyDamagesAwardedValue
|
70000000 | USD |
| CY2015 | us-gaap |
Loss Contingency Damages Awarded Value
LossContingencyDamagesAwardedValue
|
9000000 | USD |
| CY2013Q2 | us-gaap |
Loss Contingency Pending Claims Number
LossContingencyPendingClaimsNumber
|
39 | claims |
| CY2015Q4 | us-gaap |
Loss Contingency Range Of Possible Loss Maximum
LossContingencyRangeOfPossibleLossMaximum
|
1500000000 | USD |
| CY2015Q4 | us-gaap |
Malpractice Loss Contingency Letters Of Credit And Surety Bonds
MalpracticeLossContingencyLettersOfCreditAndSuretyBonds
|
145600000 | USD |
| CY2014Q4 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
11000000 | USD |
| CY2015Q4 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
33000000 | USD |
| CY2014Q4 | us-gaap |
Money Market Funds At Carrying Value
MoneyMarketFundsAtCarryingValue
|
65000000 | USD |
| CY2015Q4 | us-gaap |
Money Market Funds At Carrying Value
MoneyMarketFundsAtCarryingValue
|
18000000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
243000000 | USD |
| CY2014 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
496000000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
-118000000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-692000000 | USD |
| CY2014 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-994000000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-522000000 | USD |
| CY2013 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
544000000 | USD |
| CY2014 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
518000000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
517000000 | USD |
| CY2013 | us-gaap |
Net Income Loss
NetIncomeLoss
|
105000000 | USD |
| CY2014 | us-gaap |
Net Income Loss
NetIncomeLoss
|
175000000 | USD |
| CY2015 | us-gaap |
Net Income Loss
NetIncomeLoss
|
172000000 | USD |
| CY2013 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
-1000000 | USD |
| CY2014 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
-1000000 | USD |
| CY2015 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
0 | USD |
| CY2013 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
20000000 | USD |
| CY2014 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
38000000 | USD |
| CY2015 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
22000000 | USD |
| CY2013 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
206000000 | USD |
| CY2014 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
293000000 | USD |
| CY2015 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
309000000 | USD |
| CY2015Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable Current
OperatingLeasesFutureMinimumPaymentsReceivableCurrent
|
4000000 | USD |
| CY2015Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Five Years
OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears
|
3000000 | USD |
| CY2015Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Four Years
OperatingLeasesFutureMinimumPaymentsReceivableInFourYears
|
3000000 | USD |
| CY2015Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Three Years
OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears
|
3000000 | USD |
| CY2015Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Two Years
OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears
|
3000000 | USD |
| CY2013 | us-gaap |
Operating Leases Rent Expense Sublease Rentals1
OperatingLeasesRentExpenseSubleaseRentals1
|
3000000 | USD |
| CY2014 | us-gaap |
Operating Leases Rent Expense Sublease Rentals1
OperatingLeasesRentExpenseSubleaseRentals1
|
3000000 | USD |
| CY2015 | us-gaap |
Operating Leases Rent Expense Sublease Rentals1
OperatingLeasesRentExpenseSubleaseRentals1
|
3000000 | USD |
| CY2014Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
115000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
88000000 | USD |
| CY2014Q4 | us-gaap |
Other Assets Miscellaneous
OtherAssetsMiscellaneous
|
3000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Miscellaneous
OtherAssetsMiscellaneous
|
2000000 | USD |
| CY2014Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
48000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
55000000 | USD |
| CY2015Q4 | us-gaap |
Other Commitment
OtherCommitment
|
33000000 | USD |
| CY2015Q4 | us-gaap |
Other Commitment Due In Next Twelve Months
OtherCommitmentDueInNextTwelveMonths
|
15000000 | USD |
| CY2015Q4 | us-gaap |
Other Commitment Due In Second Year
OtherCommitmentDueInSecondYear
|
11000000 | USD |
| CY2015Q4 | us-gaap |
Other Commitment Due In Third Year
OtherCommitmentDueInThirdYear
|
7000000 | USD |
| CY2013 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
1000000 | USD |
| CY2014 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
-2000000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
-1000000 | USD |
| CY2014Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
42000000 | USD |
| CY2015Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
44000000 | USD |
| CY2014Q4 | us-gaap |
Other Investments
OtherInvestments
|
120000000 | USD |
| CY2015Q4 | us-gaap |
Other Investments
OtherInvestments
|
0 | USD |
| CY2014Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
236000000 | USD |
| CY2015Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
259000000 | USD |
| CY2014Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
21000000 | USD |
| CY2015Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
29000000 | USD |
| CY2013 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-18000000 | USD |
| CY2014 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-12000000 | USD |
| CY2015 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-17000000 | USD |
| CY2013 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
7000000 | USD |
| CY2014 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1000000 | USD |
| CY2015 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1000000 | USD |
| CY2014Q4 | us-gaap |
Other Postretirement Defined Benefit Plan Liabilities Noncurrent
OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent
|
105000000 | USD |
| CY2015Q4 | us-gaap |
Other Postretirement Defined Benefit Plan Liabilities Noncurrent
OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent
|
106000000 | USD |
| CY2013 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
44000000 | USD |
| CY2014 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
6000000 | USD |
| CY2015 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
-50000000 | USD |
| CY2013 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-3000000 | USD |
| CY2014 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-5000000 | USD |
| CY2015 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
0 | USD |
| CY2013 | us-gaap |
Payments Of Debt Issuance Costs
PaymentsOfDebtIssuanceCosts
|
3000000 | USD |
| CY2014 | us-gaap |
Payments Of Debt Issuance Costs
PaymentsOfDebtIssuanceCosts
|
2000000 | USD |
| CY2015 | us-gaap |
Payments Of Debt Issuance Costs
PaymentsOfDebtIssuanceCosts
|
1000000 | USD |
| CY2013 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
84000000 | USD |
| CY2014 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
87000000 | USD |
| CY2015 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
97000000 | USD |
| CY2013 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
656000000 | USD |
| CY2014 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
1007000000 | USD |
| CY2015 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
598000000 | USD |
| CY2013 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
26000000 | USD |
| CY2014 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
19000000 | USD |
| CY2015 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
19000000 | USD |
| CY2013 | us-gaap |
Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
|
37000000 | USD |
| CY2014 | us-gaap |
Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
|
33000000 | USD |
| CY2015 | us-gaap |
Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
|
34000000 | USD |
| CY2014Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
237000000 | USD |
| CY2015Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
259000000 | USD |
| CY2013 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2014 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2015 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2015Q4 | us-gaap |
Pledged Financial Instruments Not Separately Reported Securities For Letter Of Credit Facilities
PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForLetterOfCreditFacilities
|
108000000 | USD |
| CY2014Q4 | us-gaap |
Preferred Stock No Par Value
PreferredStockNoParValue
|
0 | |
| CY2015Q4 | us-gaap |
Preferred Stock No Par Value
PreferredStockNoParValue
|
0 | |
| CY2014Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
30000000 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
30000000 | shares |
| CY2014Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2014Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | shares |
| CY2014Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
0 | USD |
| CY2015Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
0 | USD |
| CY2014Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
39000000 | USD |
| CY2015Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
43000000 | USD |
| CY2014Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
|
7000000 | USD |
| CY2015Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
|
10000000 | USD |
| CY2014Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
|
228000000 | USD |
| CY2015Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
|
291000000 | USD |
| CY2015 | us-gaap |
Proceeds From Decommissioning Fund
ProceedsFromDecommissioningFund
|
50000000 | USD |
| CY2013 | us-gaap |
Proceeds From Insurance Settlement Investing Activities
ProceedsFromInsuranceSettlementInvestingActivities
|
6000000 | USD |
| CY2014 | us-gaap |
Proceeds From Insurance Settlement Investing Activities
ProceedsFromInsuranceSettlementInvestingActivities
|
3000000 | USD |
| CY2015 | us-gaap |
Proceeds From Insurance Settlement Investing Activities
ProceedsFromInsuranceSettlementInvestingActivities
|
0 | USD |
| CY2014 | us-gaap |
Proceeds From Issuance Of Commercial Paper
ProceedsFromIssuanceOfCommercialPaper
|
0 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Commercial Paper
ProceedsFromIssuanceOfCommercialPaper
|
6000000 | USD |
| CY2013Q2 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
47000000 | USD |
| CY2013Q3 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
20000000 | USD |
| CY2013 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
67000000 | USD |
| CY2014 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
0 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
271000000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of First Mortgage Bond
ProceedsFromIssuanceOfFirstMortgageBond
|
145000000 | USD |
| CY2013 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
380000000 | USD |
| CY2014 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
585000000 | USD |
| CY2015Q1 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
75000000 | USD |
| CY2015Q2 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
70000000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
145000000 | USD |
| CY2013 | us-gaap |
Proceeds From Legal Settlements
ProceedsFromLegalSettlements
|
44000000 | USD |
| CY2014 | us-gaap |
Proceeds From Legal Settlements
ProceedsFromLegalSettlements
|
6000000 | USD |
| CY2015 | us-gaap |
Proceeds From Legal Settlements
ProceedsFromLegalSettlements
|
0 | USD |
| CY2013 | us-gaap |
Proceeds From Sale Maturity And Collections Of Investments
ProceedsFromSaleMaturityAndCollectionsOfInvestments
|
25000000 | USD |
| CY2014 | us-gaap |
Proceeds From Sale Maturity And Collections Of Investments
ProceedsFromSaleMaturityAndCollectionsOfInvestments
|
17000000 | USD |
| CY2015 | us-gaap |
Proceeds From Sale Maturity And Collections Of Investments
ProceedsFromSaleMaturityAndCollectionsOfInvestments
|
22000000 | USD |
| CY2013 | us-gaap |
Proceeds From Sale Of Productive Assets
ProceedsFromSaleOfProductiveAssets
|
0 | USD |
| CY2014 | us-gaap |
Proceeds From Sale Of Productive Assets
ProceedsFromSaleOfProductiveAssets
|
5000000 | USD |
| CY2015 | us-gaap |
Proceeds From Sale Of Productive Assets
ProceedsFromSaleOfProductiveAssets
|
0 | USD |
| CY2013 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
35000000 | USD |
| CY2014 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
0 | USD |
| CY2015 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
0 | USD |
| CY2013 | us-gaap |
Profit Loss
ProfitLoss
|
104000000 | USD |
| CY2014 | us-gaap |
Profit Loss
ProfitLoss
|
174000000 | USD |
| CY2015 | us-gaap |
Profit Loss
ProfitLoss
|
172000000 | USD |
| CY2013 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
6000000 | USD |
| CY2014 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
6000000 | USD |
| CY2015 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
6000000 | USD |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Additions
PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
|
41000000 | USD |
| CY2013 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
13000000 | USD |
| CY2014 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
37000000 | USD |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
21000000 | USD |
| CY2013 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
7000000 | USD |
| CY2014 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
22000000 | USD |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
13000000 | USD |
| CY2013 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Rate
PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
|
0.075 | |
| CY2014 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Rate
PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
|
0.074 | |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Rate
PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
|
0.073 | |
| CY2013 | us-gaap |
Public Utilities Approved Return On Equity Percentage
PublicUtilitiesApprovedReturnOnEquityPercentage
|
0.10 | |
| CY2014 | us-gaap |
Public Utilities Approved Return On Equity Percentage
PublicUtilitiesApprovedReturnOnEquityPercentage
|
0.0975 | |
| CY2015 | us-gaap |
Public Utilities Approved Return On Equity Percentage
PublicUtilitiesApprovedReturnOnEquityPercentage
|
0.0968 | |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
2899000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
3093000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Construction Work In Progress
PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
|
417000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Construction Work In Progress
PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
|
545000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
3075000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
3192000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
3742000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
3898000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
5679000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
6012000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
8578000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
9105000000 | USD |
| CY2014Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
440000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
451000000 | USD |
| CY2015Q4 | us-gaap |
Ratio Of Indebtedness To Net Capital1
RatioOfIndebtednessToNetCapital1
|
0.495 | |
| CY2014Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
133000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
129000000 | USD |
| CY2014Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
494000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
524000000 | USD |
| CY2014Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
60000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
55000000 | USD |
| CY2014Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
906000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
928000000 | USD |
| CY2013 | us-gaap |
Repayments Of Commercial Paper
RepaymentsOfCommercialPaper
|
17000000 | USD |
| CY2015Q1 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
70000000 | USD |
| CY2015Q1 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
50000000 | USD |
| CY2015Q2 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
67000000 | USD |
| us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
200000000 | USD | |
| CY2013 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
35000000 | USD |
| CY2014 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
0 | USD |
| CY2015 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
0 | USD |
| CY2014Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1000000000 | USD |
| CY2015Q3 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
55000000 | USD |
| CY2015 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
442000000 | USD |
| CY2013 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
100000000 | USD |
| CY2014 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
0 | USD |
| CY2015 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
442000000 | USD |
| CY2015Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1070000000 | USD |
| CY2013 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
4000000 | USD |
| CY2014 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
6000000 | USD |
| CY2015 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
6000000 | USD |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
|
7007 | shares |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
|
12278 | shares |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
|
14988 | shares |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
|
27.15 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
|
29.90 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
|
34.10 | |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
|
183071 | shares |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
|
203410 | shares |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
|
181797 | shares |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
29.25 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
31.49 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
|
34.77 | |
| CY2012Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
|
440562 | shares |
| CY2013Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
|
431090 | shares |
| CY2014Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
|
463893 | shares |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
|
442993 | shares |
| CY2012Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
22.54 | |
| CY2013Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
26.31 | |
| CY2014Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
28.96 | |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
32.84 | |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid
|
0 | USD |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid
|
0 | USD |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid
|
1000000 | USD |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
|
185536 | shares |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
|
158329 | shares |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
|
187709 | shares |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
|
0 | USD |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
|
3000000 | USD |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
|
4000000 | USD |
| CY2013 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
|
20.20 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
|
24.95 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
|
25.82 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
|
0.230 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
|
0.192 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.124 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.132 | |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
|
0.006 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
|
0.010 | |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
|
4687500 | shares |
| CY2015Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
|
3443904 | shares |
| CY2013Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.004 | |
| CY2014Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.000 | |
| CY2015Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.006 | |
| CY2013 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
9000000 | USD |
| CY2014 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
0 | USD |
| CY2015 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
0 | USD |
| CY1997 | us-gaap |
Site Contingency Names Of Other Potentially Responsible Parties
SiteContingencyNamesOfOtherPotentiallyResponsibleParties
|
69 | |
| CY2015 | us-gaap |
Site Contingency Names Of Other Potentially Responsible Parties
SiteContingencyNamesOfOtherPotentiallyResponsibleParties
|
100 | |
| CY2014Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
1911000000 | USD |
| CY2015Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
2258000000 | USD |
| CY2015 | us-gaap |
Subsidiary Or Equity Method Investee Cumulative Percentage Ownership After All Transactions
SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
|
1.00 | |
| CY2013 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
103000000 | USD |
| CY2014 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
109000000 | USD |
| CY2015 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
116000000 | USD |
| CY2014Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
22000000 | USD |
| CY2015Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
25000000 | USD |
| CY2014Q4 | us-gaap |
Us Government Securities At Carrying Value
USGovernmentSecuritiesAtCarryingValue
|
14000000 | USD |
| CY2015Q4 | us-gaap |
Us Government Securities At Carrying Value
USGovernmentSecuritiesAtCarryingValue
|
14000000 | USD |
| CY2014 | us-gaap |
Unrealized Gain Loss On Investments
UnrealizedGainLossOnInvestments
|
2000000 | USD |
| CY2015 | us-gaap |
Unrealized Gain Loss On Investments
UnrealizedGainLossOnInvestments
|
-2000000 | USD |
| CY2013 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-3000000 | USD |
| CY2014 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-7000000 | USD |
| CY2015 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-6000000 | USD |
| CY2014Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2015Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2014Q4 | us-gaap |
Unsecured Debt Current
UnsecuredDebtCurrent
|
305000000 | USD |
| CY2015Q4 | us-gaap |
Unsecured Debt Current
UnsecuredDebtCurrent
|
0 | USD |
| CY2014Q4 | us-gaap |
Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net
VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet
|
4000000 | USD |
| CY2015Q4 | us-gaap |
Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities Net
VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet
|
3000000 | USD |
| CY2015 | us-gaap |
Variable Interest Entity Ownership Percentage
VariableInterestEntityOwnershipPercentage
|
0.01 | |
| CY2013 | us-gaap |
Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
|
567000 | shares |
| CY2014 | us-gaap |
Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
|
2314000 | shares |
| CY2015 | us-gaap |
Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
|
161000 | shares |
| CY2013 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
77388000 | shares |
| CY2014 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
80494000 | shares |
| CY2015 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
84341000 | shares |
| CY2013 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
76821000 | shares |
| CY2014 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
78180000 | shares |
| CY2015 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
84180000 | shares |
