2017 Q1 Form 10-K Financial Statement
#000078497717000006 Filed on February 17, 2017
Income Statement
| Concept | 2017 Q1 | 2016 | 2015 Q4 |
|---|---|---|---|
| Revenue | $530.0M | $1.923B | $499.0M |
| YoY Change | 8.83% | 1.32% | -0.2% |
| Cost Of Revenue | $155.0M | $925.0M | $225.0M |
| YoY Change | -10.92% | 23.17% | 5.14% |
| Gross Profit | $375.0M | $998.0M | $274.0M |
| YoY Change | 19.81% | -12.99% | -4.2% |
| Gross Profit Margin | 70.75% | 51.9% | 54.91% |
| Selling, General & Admin | $68.00M | $240.0M | $62.00M |
| YoY Change | 11.48% | -0.41% | -1.59% |
| % of Gross Profit | 18.13% | 24.05% | 22.63% |
| Research & Development | |||
| YoY Change | |||
| % of Gross Profit | |||
| Depreciation & Amortization | $84.00M | $321.0M | $78.00M |
| YoY Change | 2.44% | 5.25% | 1.3% |
| % of Gross Profit | 22.4% | 32.16% | 28.47% |
| Operating Expenses | $185.0M | $680.0M | $170.0M |
| YoY Change | 6.94% | 2.72% | 1.8% |
| Operating Profit | $124.0M | $340.0M | $104.0M |
| YoY Change | 25.25% | 10.03% | -12.61% |
| Interest Expense | $30.00M | $112.0M | -$42.00M |
| YoY Change | 11.11% | -1.75% | -31.15% |
| % of Operating Profit | 24.19% | 32.94% | -40.38% |
| Other Income/Expense, Net | $2.000M | $15.00M | $1.000M |
| YoY Change | -66.67% | -31.82% | |
| Pretax Income | $96.00M | $243.0M | $63.00M |
| YoY Change | 23.08% | 11.98% | 8.62% |
| Income Tax | $23.00M | $50.00M | $12.00M |
| % Of Pretax Income | 23.96% | 20.58% | 19.05% |
| Net Earnings | $73.00M | $193.0M | $51.00M |
| YoY Change | 19.67% | 12.21% | 18.6% |
| Net Earnings / Revenue | 13.77% | 10.04% | 10.22% |
| Basic Earnings Per Share | $2.17 | ||
| Diluted Earnings Per Share | $820.2K | $2.16 | $569.8K |
| COMMON SHARES | |||
| Basic Shares Outstanding | 88.95M shares | 88.90M shares | 88.77M shares |
| Diluted Shares Outstanding | 89.05M shares |
Balance Sheet
| Concept | 2017 Q1 | 2016 | 2015 Q4 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $51.00M | $14.00M | $37.00M |
| YoY Change | 15.91% | -62.16% | -73.19% |
| Cash & Equivalents | $31.00M | $6.000M | $4.000M |
| Short-Term Investments | $20.00M | $8.000M | $33.00M |
| Other Short-Term Assets | $87.00M | $212.0M | $88.00M |
| YoY Change | -23.01% | -24.01% | -23.48% |
| Inventory | $77.00M | $82.00M | $83.00M |
| Prepaid Expenses | $43.00M | ||
| Receivables | $162.0M | $155.0M | $158.0M |
| Other Receivables | $0.00 | $0.00 | $0.00 |
| Total Short-Term Assets | $485.0M | $463.0M | $557.0M |
| YoY Change | -9.68% | -16.88% | -20.31% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $6.466B | $5.862B | $6.012B |
| YoY Change | 4.97% | -2.5% | 15.59% |
| Goodwill | |||
| YoY Change | |||
| Intangibles | |||
| YoY Change | |||
| Long-Term Investments | |||
| YoY Change | |||
| Other Assets | $54.00M | $630.0M | $44.00M |
| YoY Change | 12.5% | -1.72% | -8.33% |
| Total Long-Term Assets | $7.127B | $7.064B | $6.653B |
| YoY Change | 4.7% | 6.18% | 4.89% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $485.0M | $463.0M | $557.0M |
| Total Long-Term Assets | $7.127B | $7.064B | $6.653B |
| Total Assets | $7.612B | $7.527B | $7.210B |
| YoY Change | 3.65% | 4.4% | 2.39% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $92.00M | $129.0M | $98.00M |
| YoY Change | -6.12% | 31.63% | -37.18% |
| Accrued Expenses | $141.0M | $148.0M | $151.0M |
| YoY Change | -7.84% | -1.99% | 15.27% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $0.00 | $0.00 | $6.000M |
| YoY Change | -100.0% | ||
| Long-Term Debt Due | $150.0M | $150.0M | $133.0M |
| YoY Change | 12.78% | -64.53% | |
| Total Short-Term Liabilities | $548.0M | $577.0M | $626.0M |
| YoY Change | 7.87% | -7.83% | -28.29% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $2.200B | $2.200B | $2.060B |
| YoY Change | 0.05% | 6.8% | -3.1% |
| Other Long-Term Liabilities | $113.0M | $1.737B | $29.00M |
| YoY Change | 37.8% | 6.3% | 38.1% |
| Total Long-Term Liabilities | $2.313B | $3.937B | $2.089B |
| YoY Change | 1.4% | 6.58% | -2.7% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $548.0M | $577.0M | $626.0M |
| Total Long-Term Liabilities | $2.313B | $3.937B | $2.089B |
| Total Liabilities | $5.225B | $5.183B | $4.952B |
| YoY Change | 3.4% | 4.66% | -3.49% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | $1.195B | $1.070B | |
| YoY Change | 8.24% | 7.0% | |
| Common Stock | $1.200B | $1.196B | |
| YoY Change | 0.42% | 30.28% | |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | |||
| YoY Change | |||
| Treasury Stock Shares | |||
| Shareholders Equity | $2.387B | $2.344B | $2.258B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $7.612B | $7.527B | $7.210B |
| YoY Change | 3.65% | 4.4% | 2.39% |
Cashflow Statement
| Concept | 2017 Q1 | 2016 | 2015 Q4 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $73.00M | $193.0M | $51.00M |
| YoY Change | 19.67% | 12.21% | 18.6% |
| Depreciation, Depletion And Amortization | $84.00M | $321.0M | $78.00M |
| YoY Change | 2.44% | 5.25% | 1.3% |
| Cash From Operating Activities | $170.0M | $562.0M | $78.00M |
| YoY Change | 5.59% | 8.08% | 73.33% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | $114.0M | $584.0M | -$146.0M |
| YoY Change | -12.98% | -2.34% | -20.22% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $1.000M | $3.000M | $1.000M |
| YoY Change | -50.0% | -90.0% | |
| Cash From Investing Activities | -$113.0M | -$585.0M | -$145.0M |
| YoY Change | -15.04% | 12.07% | -16.18% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | $28.00M | $110.0M | |
| YoY Change | 3.7% | 13.4% | |
| Common Stock Issuance & Retirement, Net | $0.00 | ||
| YoY Change | -100.0% | ||
| Debt Paid & Issued, Net | $0.00 | $133.0M | |
| YoY Change | -100.0% | -69.91% | |
| Cash From Financing Activities | -$32.00M | $25.00M | -21.00M |
| YoY Change | 14.29% | -120.66% | -113.29% |
| NET CHANGE | |||
| Cash From Operating Activities | $170.0M | $562.0M | 78.00M |
| Cash From Investing Activities | -$113.0M | -$585.0M | -145.0M |
| Cash From Financing Activities | -$32.00M | $25.00M | -21.00M |
| Net Change In Cash | $25.00M | $2.000M | -88.00M |
| YoY Change | -101.63% | -393.33% | |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $170.0M | $562.0M | $78.00M |
| Capital Expenditures | $114.0M | $584.0M | -$146.0M |
| Free Cash Flow | $56.00M | -$22.00M | $224.0M |
| YoY Change | 86.67% | -71.79% | -1.75% |
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| CY2016 | por |
Estimated Average Service Life Hydro Production Plant
EstimatedAverageServiceLifeHydroProductionPlant
|
95 | |
| CY2016 | por |
Estimated Average Service Life Wind Production Plant
EstimatedAverageServiceLifeWindProductionPlant
|
30 | |
| CY2016 | por |
Employee Stock Purchase Plan Purchased Stock Value Limitation
EmployeeStockPurchasePlanPurchasedStockValueLimitation
|
25000 | USD |
| CY2016 | por |
Employee Stock Purchase Plan Share Purchase Limitation
EmployeeStockPurchasePlanSharePurchaseLimitation
|
1500 | shares |
| CY2016Q4 | por |
Employee Stock Purchase Plan Shares Authorized
EmployeeStockPurchasePlanSharesAuthorized
|
625000 | shares |
| CY2016 | por |
Estimated Average Service Lives Distribution Plant
EstimatedAverageServiceLivesDistributionPlant
|
45 | |
| CY2016 | por |
Estimated Average Service Lives General Plant
EstimatedAverageServiceLivesGeneralPlant
|
12 | |
| CY2016 | por |
Estimated Average Service Lives Transmission Plant
EstimatedAverageServiceLivesTransmissionPlant
|
57 | |
| CY2016Q4 | por |
Estimatedtotalremediationcostsdiscounted
Estimatedtotalremediationcostsdiscounted
|
1050000000 | USD |
| CY2016 | por |
Excesstaxbenefitsrecognizedrelatedtosharebasedpaymentawards
Excesstaxbenefitsrecognizedrelatedtosharebasedpaymentawards
|
1000000 | USD |
| CY2015Q4 | por |
Fair Value Money Market Funds
FairValueMoneyMarketFunds
|
0 | USD |
| CY2016Q4 | por |
Fair Value Money Market Funds
FairValueMoneyMarketFunds
|
1000000 | USD |
| CY2015Q4 | por |
Fair Value Of Money Market Funds Other Post Retirement Benefit Plan Assets At Fair Value
FairValueOfMoneyMarketFundsOtherPostRetirementBenefitPlanAssetsAtFairValue
|
0 | USD |
| CY2016 | por |
Ferc Authorized Short Term Debt Effective Through February62014
FercAuthorizedShortTermDebtEffectiveThroughFebruary62014
|
900000000 | USD |
| CY2016Q4 | por |
First Mortgage Bonds Maximum Rate
FirstMortgageBondsMaximumRate
|
0.0931 | |
| CY2016Q4 | por |
First Mortgage Bonds Minimum Rate
FirstMortgageBondsMinimumRate
|
0.0251 | |
| CY2014 | por |
Franchise Taxes
FranchiseTaxes
|
42000000 | USD |
| CY2015 | por |
Franchise Taxes
FranchiseTaxes
|
43000000 | USD |
| CY2016 | por |
Franchise Taxes
FranchiseTaxes
|
43000000 | USD |
| CY2016Q4 | por |
Incorporated Cities
IncorporatedCities
|
51 | |
| CY2015Q4 | por |
International Equity Securities Other Post Retirement Assets At Fair Value
InternationalEquitySecuritiesOtherPostRetirementAssetsAtFairValue
|
8000000 | USD |
| CY1993Q4 | por |
Investment In Trojan
InvestmentInTrojan
|
0.87 | |
| CY2016 | por |
Jointly Owned Plant Boardman Plant In Service Year
JointlyOwnedPlantBoardmanPlantInServiceYear
|
1980 | |
| CY2016 | por |
Jointly Owned Plant Colstrip Plant In Service Year
JointlyOwnedPlantColstripPlantInServiceYear
|
1986 | |
| CY2016 | por |
Jointly Owned Plant Peltonin Service Year
JointlyOwnedPlantPeltoninServiceYear
|
1958 | |
| CY2016 | por |
Jointly Owned Plant Round Buttein Service Year
JointlyOwnedPlantRoundButteinServiceYear
|
1964 | |
| CY2016Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Boardman Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfBoardmanPlantInService
|
514000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Colstrip Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfColstripPlantInService
|
528000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Gross Ownership Amount Of Peltonround Butte Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfPeltonroundButtePlantInService
|
255000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Boardman Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfBoardmanPlantAccumulatedDepreciation
|
400000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Colstrip Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfColstripPlantAccumulatedDepreciation
|
342000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Boardman
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressBoardman
|
0 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Colstrip
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressColstrip
|
9000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress Peltonround Butte
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgressPeltonroundButte
|
5000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Ownership Amount Of Peltonround Butte Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfPeltonroundButtePlantAccumulatedDepreciation
|
63000000 | USD |
| CY2016Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Boardman
JointlyOwnedUtilityPlantProportionateOwnershipShareOfBoardman
|
0.9000 | |
| CY2016Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Colstrip
JointlyOwnedUtilityPlantProportionateOwnershipShareOfColstrip
|
0.2000 | |
| CY2016Q4 | por |
Jointly Owned Utility Plant Proportionate Ownership Share Of Peltonround Butte
JointlyOwnedUtilityPlantProportionateOwnershipShareOfPeltonroundButte
|
0.6667 | |
| CY2016Q4 | por |
Letterofcreditfacility
Letterofcreditfacility
|
160000000 | USD |
| CY2015 | por |
Level3 Realized And Unrealized Losses Offset By Effect Of Regulatory Accounting
Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting
|
80000000 | USD |
| CY2016 | por |
Level3 Realized And Unrealized Losses Offset By Effect Of Regulatory Accounting
Level3RealizedAndUnrealizedLossesOffsetByEffectOfRegulatoryAccounting
|
11000000 | USD |
| CY2016 | por |
Line Of Credit Facitlity Covenant Terms One Month Term
LineOfCreditFacitlityCovenantTermsOneMonthTerm
|
1 | |
| CY2016 | por |
Line Of Credit Facitlity Covenant Terms Six Month Term
LineOfCreditFacitlityCovenantTermsSixMonthTerm
|
6 | |
| CY2016 | por |
Line Of Credit Facitlity Covenant Terms Three Month Term
LineOfCreditFacitlityCovenantTermsThreeMonthTerm
|
3 | |
| CY2016 | por |
Line Of Credit Facitlity Covenant Terms Two Month Term
LineOfCreditFacitlityCovenantTermsTwoMonthTerm
|
2 | |
| CY2015Q4 | por |
Long Term Debt First Mortgage Bonds
LongTermDebtFirstMortgageBonds
|
2083000000 | USD |
| CY2016Q4 | por |
Long Term Debt First Mortgage Bonds
LongTermDebtFirstMortgageBonds
|
2090000000 | USD |
| CY2016 | por |
Maximum Percentage Of Output Possibley Allocated
MaximumPercentageOfOutputPossibleyAllocated
|
0.25 | |
| CY2016 | por |
Net Actuarial Loss Portion Of Amortization From Aocl For Non Qualified Benefits
NetActuarialLossPortionOfAmortizationFromAoclForNonQualifiedBenefits
|
1000000 | USD |
| CY2016 | por |
Net Actuarial Loss Portion Of Amortization From Aocl For Pension Benefits
NetActuarialLossPortionOfAmortizationFromAoclForPensionBenefits
|
13000000 | USD |
| CY2016 | por |
Net Actuarial Loss Portion Of Amortiztion Of Aocl For Other Postretirement Benefits
NetActuarialLossPortionOfAmortiztionOfAoclForOtherPostretirementBenefits
|
1000000 | 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 |
| CY2016 | por |
Net Gain Or Loss Recognized In Statement Of Income Offset By Regulatory Accounting
NetGainOrLossRecognizedInStatementOfIncomeOffsetByRegulatoryAccounting
|
13000000 | 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 |
| CY2016Q4 | por |
Net Liabilities From Price Risk Management Activities Classified As Level3
NetLiabilitiesFromPriceRiskManagementActivitiesClassifiedAsLevel3
|
119000000 | USD |
| CY2015 | por |
Net Realized Losses
NetRealizedLosses
|
0 | USD |
| CY2016 | por |
Net Realized Losses
NetRealizedLosses
|
0 | USD |
| CY2014 | por |
Net Taxes On Change In Compensation Retirement Benefits Liability And Amortization
NetTaxesOnChangeInCompensationRetirementBenefitsLiabilityAndAmortization
|
2000000 | USD |
| CY2015Q4 | por |
Noncurrent Derivative Liabilities
NoncurrentDerivativeLiabilities
|
161000000 | USD |
| CY2016Q4 | por |
Noncurrent Derivative Liabilities
NoncurrentDerivativeLiabilities
|
125000000 | USD |
| CY2016Q4 | por |
Number Of Retail Customers
NumberOfRetailCustomers
|
863000 | retail_customers |
| CY2016Q4 | por |
Number Of Union Employees
NumberOfUnionEmployees
|
783 | shares |
| CY2016Q4 | por |
Number Of Union Employees Subject To Agreement A
NumberOfUnionEmployeesSubjectToAgreementA
|
730 | shares |
| CY2016Q4 | por |
Number Of Union Employees Subject To Agreement B
NumberOfUnionEmployeesSubjectToAgreementB
|
53 | shares |
| CY2015 | por |
Numberof Years
NumberofYears
|
3 | |
| CY2016 | por |
Numberof Years
NumberofYears
|
3 | |
| CY2015Q4 | por |
Other Current Liabilities Other
OtherCurrentLiabilitiesOther
|
75000000 | USD |
| CY2016Q4 | por |
Other Current Liabilities Other
OtherCurrentLiabilitiesOther
|
71000000 | USD |
| CY2015Q4 | por |
Otherpostretirementdefinedbenefitplanliabilitycurrent
Otherpostretirementdefinedbenefitplanliabilitycurrent
|
2000000 | USD |
| CY2016Q4 | por |
Otherpostretirementdefinedbenefitplanliabilitycurrent
Otherpostretirementdefinedbenefitplanliabilitycurrent
|
2000000 | USD |
| CY2016Q4 | por |
Percent Of States Population
PercentOfStatesPopulation
|
0.46 | |
| CY2016 | por |
Performancebasedstockawardpercentagemaximum
Performancebasedstockawardpercentagemaximum
|
1.50 | |
| CY2016 | por |
Performancebasedstockawardpercentageminimum
Performancebasedstockawardpercentageminimum
|
0 | |
| CY2015Q4 | por |
Pollution Control Revenue Bonds Owned By Pge
PollutionControlRevenueBondsOwnedByPge
|
21000000 | USD |
| CY2016Q4 | por |
Pollution Control Revenue Bonds Owned By Pge
PollutionControlRevenueBondsOwnedByPge
|
21000000 | USD |
| CY2016 | por |
Power Cost Deadband Lower Threshold
PowerCostDeadbandLowerThreshold
|
15000000 | USD |
| CY2016 | por |
Power Cost Deadband Upper Threshold
PowerCostDeadbandUpperThreshold
|
30000000 | USD |
| CY2015Q4 | por |
Public Utilities Property Plant And Equipment General
PublicUtilitiesPropertyPlantAndEquipmentGeneral
|
463000000 | USD |
| CY2016Q4 | por |
Public Utilities Property Plant And Equipment General
PublicUtilitiesPropertyPlantAndEquipmentGeneral
|
501000000 | USD |
| CY2015Q4 | por |
Public Utilities Property Plant And Equipment Intangible
PublicUtilitiesPropertyPlantAndEquipmentIntangible
|
556000000 | USD |
| CY2016Q4 | por |
Public Utilities Property Plant And Equipment Intangible
PublicUtilitiesPropertyPlantAndEquipmentIntangible
|
572000000 | USD |
| CY2015 | por |
Realized And Unrealized Gains And Losses Net Commodity Contract
RealizedAndUnrealizedGainsAndLossesNetCommodityContract
|
80000000 | USD |
| CY2016 | por |
Realized And Unrealized Gains And Losses Net Commodity Contract
RealizedAndUnrealizedGainsAndLossesNetCommodityContract
|
11000000 | 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 |
| CY2016 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Electricity
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsElectricity
|
34000000 | 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 |
| CY2016 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Foreign Currency
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsForeignCurrency
|
0 | USD |
| CY2016Q4 | por |
Regulatory Assets From Price Risk Management Activities
RegulatoryAssetsFromPriceRiskManagementActivities
|
18000000 | 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 |
| CY2016 | por |
Realized And Unrealized Gains And Losses Net Commodity Contracts Natural Gas
RealizedAndUnrealizedGainsAndLossesNetCommodityContractsNaturalGas
|
-56000000 | USD |
| CY2008Q3 | por |
Refund To Customers For Trojan Investment Including Interest
RefundToCustomersForTrojanInvestmentIncludingInterest
|
33000000 | USD |
| CY2016Q4 | por |
Regulatory Assets Earning Rate Of Return At Approved Rate
RegulatoryAssetsEarningRateOfReturnAtApprovedRate
|
3000000 | USD |
| CY2016Q4 | por |
Regulatory Assets Earning Rate Of Return At Cost Of Capital
RegulatoryAssetsEarningRateOfReturnAtCostOfCapital
|
19000000 | USD |
| CY2016Q4 | por |
Regulatory Assets Earning Rate Of Return By Inclusion In Rate Base
RegulatoryAssetsEarningRateOfReturnByInclusionInRateBase
|
22000000 | USD |
| CY2016Q4 | por |
Regulatory Assets Earning Return
RegulatoryAssetsEarningReturn
|
44000000 | USD |
| CY2015Q4 | por |
Regulatory Assets Earning Return Other Category
RegulatoryAssetsEarningReturnOtherCategory
|
29000000 | USD |
| CY2016Q4 | por |
Regulatory Assets Earning Return Other Category
RegulatoryAssetsEarningReturnOtherCategory
|
44000000 | USD |
| CY2015Q4 | por |
Regulatory Assets From Price Risk Management Activities
RegulatoryAssetsFromPriceRiskManagementActivities
|
10000000 | USD |
| CY2016 | por |
Remaining Recovery Periodof Regulatory Asset Debt Issuance Costs
RemainingRecoveryPeriodofRegulatoryAssetDebtIssuanceCosts
|
6 years | |
| CY2016 | por |
Remaining Recovery Periodof Regulatory Assets Price Risk Management
RemainingRecoveryPeriodofRegulatoryAssetsPriceRiskManagement
|
6 years | |
| CY2016 | por |
Remainingrefundperiodofregulatoryliability Trojandecommissioningactivities
RemainingrefundperiodofregulatoryliabilityTrojandecommissioningactivities
|
3 years | |
| CY2016Q4 | por |
Remarketable Pollution Control Bonds
RemarketablePollutionControlBonds
|
21000000 | USD |
| CY2016Q4 | por |
Service Area Population
ServiceAreaPopulation
|
1900000 | shares |
| CY2016Q4 | por |
Service Area Sq Miles
ServiceAreaSqMiles
|
4000 | sqmi |
| 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 |
| CY2016 | por |
Short Term Debt Maximum Amount Outstanding During Year
ShortTermDebtMaximumAmountOutstandingDuringYear
|
23000000 | USD |
| CY2014 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.112 | |
| CY2015 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.173 | |
| CY2016 | por |
Stock Based Compensation Attainment Of Performance Goals That Allows Vesting
StockBasedCompensationAttainmentOfPerformanceGoalsThatAllowsVesting
|
1.212 | |
| CY2016 | por |
Stock Based Compensation Forfeiture Rate
StockBasedCompensationForfeitureRate
|
0.05 | |
| CY2014 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2015 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2016 | por |
Stock Based Compensation Impact On Cash Flows
StockBasedCompensationImpactOnCashFlows
|
0 | USD |
| CY2013Q2 | por |
Stockoffering
Stockoffering
|
11100000 | shares |
| CY2013 | por |
Stockoffering
Stockoffering
|
700000 | shares |
| CY2015Q2 | por |
Stockoffering
Stockoffering
|
10400000 | shares |
| CY2016Q4 | por |
Tax Credit Carryforward Federal
TaxCreditCarryforwardFederal
|
56000000 | USD |
| CY2016Q4 | por |
Totalcapitalspendingonnewgenerationasset
Totalcapitalspendingonnewgenerationasset
|
640000000 | USD |
| CY2015Q4 | por |
Trojan Decommissioning Activities
TrojanDecommissioningActivities
|
43000000 | USD |
| CY2016Q4 | por |
Trojan Decommissioning Activities
TrojanDecommissioningActivities
|
44000000 | USD |
| CY2015Q4 | por |
Unbilled Revenue
UnbilledRevenue
|
95000000 | USD |
| CY2016Q4 | por |
Unbilled Revenue
UnbilledRevenue
|
107000000 | USD |
| CY2015Q4 | por |
Volume Related To Derivative Instruments At Balance Sheet Date Commodity Contracts Natural Gas
VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas
|
124000000 | MMBTU |
| CY2016Q4 | por |
Volume Related To Derivative Instruments At Balance Sheet Date Commodity Contracts Natural Gas
VolumeRelatedToDerivativeInstrumentsAtBalanceSheetDateCommodityContractsNaturalGas
|
107000000 | MMBTU |
| CY2015Q4 | por |
Volume Related To Derivative Instruments Held At Balance Sheet Date Commodity Contracts Electricity
VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity
|
12000000 | MWh |
| CY2016Q4 | por |
Volume Related To Derivative Instruments Held At Balance Sheet Date Commodity Contracts Electricity
VolumeRelatedToDerivativeInstrumentsHeldAtBalanceSheetDateCommodityContractsElectricity
|
8000000 | MWh |
| CY2015Q4 | por |
Volume Relatedto Derivative Instruments Heldat Balance Sheet Date Foreign Currency
VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency
|
7000000 | CAD |
| CY2016Q4 | por |
Volume Relatedto Derivative Instruments Heldat Balance Sheet Date Foreign Currency
VolumeRelatedtoDerivativeInstrumentsHeldatBalanceSheetDateForeignCurrency
|
22000000 | CAD |
| CY2014 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2015 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2016 | por |
Wholesaleaccountsreceivablewrittenoff
Wholesaleaccountsreceivablewrittenoff
|
0 | USD |
| CY2015Q4 | us-gaap |
Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
|
98000000 | USD |
| CY2016Q4 | us-gaap |
Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
|
129000000 | USD |
| CY2015Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
158000000 | USD |
| CY2016Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
155000000 | USD |
| CY2015Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-8000000 | USD |
| CY2016Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-7000000 | 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
|
0 | USD |
| CY2016 | us-gaap |
Adjustments Related To Tax Withholding For Share Based Compensation
AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
|
2000000 | USD |
| CY2015 | us-gaap |
Adjustments To Additional Paid In Capital Stock Issued Issuance Costs
AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
|
12000000 | 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 |
| CY2016Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
6000000 | 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 |
| CY2016 | us-gaap |
Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
|
5000000 | USD |
| CY2015Q4 | us-gaap |
Alternative Investments Fair Value Disclosure
AlternativeInvestmentsFairValueDisclosure
|
1000000 | USD |
| CY2014 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
25000000 | USD |
| CY2015 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
38000000 | USD |
| CY2016 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
44000000 | 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 |
| CY2016Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
161000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
6000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
7000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
7000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
15000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
2000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
1000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
3000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
4000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
3000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Period Increase Decrease
AssetRetirementObligationPeriodIncreaseDecrease
|
9000000 | USD |
| CY2014 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
2000000 | USD |
| CY2015Q4 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
3000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
30000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
5000000 | USD |
| CY2015 | us-gaap |
Asset Retirement Obligations Significant Changes
AssetRetirementObligationsSignificantChanges
|
17 | |
| CY2016 | us-gaap |
Asset Retirement Obligations Significant Changes
AssetRetirementObligationsSignificantChanges
|
6 | |
| CY2015Q4 | us-gaap |
Assets
Assets
|
7210000000 | USD |
| CY2016Q4 | us-gaap |
Assets
Assets
|
7527000000 | USD |
| CY2015Q4 | us-gaap |
Assets Current
AssetsCurrent
|
557000000 | USD |
| CY2016Q4 | us-gaap |
Assets Current
AssetsCurrent
|
463000000 | USD |
| CY2015Q4 | us-gaap |
Assets Fair Value Disclosure
AssetsFairValueDisclosure
|
57000000 | USD |
| CY2016Q4 | us-gaap |
Assets Fair Value Disclosure
AssetsFairValueDisclosure
|
72000000 | USD |
| CY2015Q4 | us-gaap |
Assets Held In Trust Noncurrent
AssetsHeldInTrustNoncurrent
|
33000000 | USD |
| CY2016Q4 | us-gaap |
Assets Held In Trust Noncurrent
AssetsHeldInTrustNoncurrent
|
34000000 | 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 |
| CY2016 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
50000000 | USD |
| CY2016Q4 | us-gaap |
Capital Lease Obligations Current
CapitalLeaseObligationsCurrent
|
3000000 | USD |
| CY2014 | us-gaap |
Capital Lease Obligations Incurred
CapitalLeaseObligationsIncurred
|
0 | USD |
| CY2015 | us-gaap |
Capital Lease Obligations Incurred
CapitalLeaseObligationsIncurred
|
0 | USD |
| CY2016 | us-gaap |
Capital Lease Obligations Incurred
CapitalLeaseObligationsIncurred
|
78000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leased Assets Gross
CapitalLeasedAssetsGross
|
57000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due
CapitalLeasesFutureMinimumPaymentsDue
|
109000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due Current
CapitalLeasesFutureMinimumPaymentsDueCurrent
|
7000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Five Years
CapitalLeasesFutureMinimumPaymentsDueInFiveYears
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Four Years
CapitalLeasesFutureMinimumPaymentsDueInFourYears
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Three Years
CapitalLeasesFutureMinimumPaymentsDueInThreeYears
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Two Years
CapitalLeasesFutureMinimumPaymentsDueInTwoYears
|
7000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Due Thereafter
CapitalLeasesFutureMinimumPaymentsDueThereafter
|
77000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Interest Included In Payments
CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
|
55000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments
CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments
|
54000000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation
CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
|
3000000 | USD |
| CY2014 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
8000000 | USD |
| CY2015 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
0 | USD |
| CY2016 | us-gaap |
Cash Acquired From Acquisition
CashAcquiredFromAcquisition
|
0 | USD |
| CY2013Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
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 |
| CY2016Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
6000000 | 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 |
| CY2016 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
2000000 | USD |
| CY2016Q4 | us-gaap |
Collateral Already Posted Aggregate Fair Value
CollateralAlreadyPostedAggregateFairValue
|
14000000 | USD |
| CY2015Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
0 | USD |
| CY2015Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2016Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2014 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.115 | |
| CY2015 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.180 | |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.260 | |
| CY2015Q4 | us-gaap |
Common Stock No Par Value
CommonStockNoParValue
|
0 | |
| CY2016Q4 | us-gaap |
Common Stock No Par Value
CommonStockNoParValue
|
0 | |
| CY2015Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
160000000 | shares |
| CY2016Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
160000000 | shares |
| CY2015Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
88792751 | shares |
| CY2016Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
88946704 | shares |
| CY2015Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
88792751 | shares |
| CY2016Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
88946704 | shares |
| CY2015Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
1196000000 | USD |
| CY2016Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
1201000000 | USD |
| CY2014 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
173000000 | USD |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
171000000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
194000000 | 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 |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
194000000 | USD |
| CY2016Q4 | us-gaap |
Construction In Progress Gross
ConstructionInProgressGross
|
634000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation
ContractualObligation
|
281000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due After Fifth Year
ContractualObligationDueAfterFifthYear
|
237000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due In Fifth Year
ContractualObligationDueInFifthYear
|
13000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due In Fourth Year
ContractualObligationDueInFourthYear
|
13000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due In Next Twelve Months
ContractualObligationDueInNextTwelveMonths
|
0 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due In Second Year
ContractualObligationDueInSecondYear
|
4000000 | USD |
| CY2016Q4 | us-gaap |
Contractual Obligation Due In Third Year
ContractualObligationDueInThirdYear
|
14000000 | USD |
| CY2014 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
713000000 | USD |
| CY2015 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
661000000 | USD |
| CY2016 | us-gaap |
Cost Of Purchased Power
CostOfPurchasedPower
|
617000000 | USD |
| CY2014 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1607000000 | USD |
| CY2015 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1589000000 | USD |
| CY2016 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
1590000000 | USD |
| CY2014 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
20000000 | USD |
| CY2015 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
4000000 | USD |
| CY2016 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
10000000 | USD |
| CY2014 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
22000000 | USD |
| CY2015 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
5000000 | USD |
| CY2016 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
13000000 | 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 |
| CY2016 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
3000000 | USD |
| CY2016 | us-gaap |
Debt Instrument Covenant Description
DebtInstrumentCovenantDescription
|
0.65 | |
| CY2016Q3 | us-gaap |
Debt Instrument Face Amount
DebtInstrumentFaceAmount
|
75000000 | USD |
| CY2016Q2 | us-gaap |
Debt Instrument Face Amount
DebtInstrumentFaceAmount
|
50000000 | USD |
| CY2016Q4 | us-gaap |
Debt Instrument Face Amount
DebtInstrumentFaceAmount
|
25000000 | USD |
| CY2016Q4 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.05 | |
| CY2016Q2 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0580 | |
| CY2016Q1 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0381 | |
| CY2016Q1 | us-gaap |
Debt Instrument Interest Rate Stated Percentage
DebtInstrumentInterestRateStatedPercentage
|
0.0251 | |
| CY2015Q4 | us-gaap |
Debt Instrument Unamortized Discount
DebtInstrumentUnamortizedDiscount
|
11000000 | USD |
| CY2016Q4 | us-gaap |
Debt Instrument Unamortized Discount
DebtInstrumentUnamortizedDiscount
|
11000000 | USD |
| CY2015Q4 | us-gaap |
Debt Weighted Average Interest Rate
DebtWeightedAverageInterestRate
|
0.0529 | |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
5000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
0 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
0 | USD |
| CY2016Q4 | us-gaap |
Debt Weighted Average Interest Rate
DebtWeightedAverageInterestRate
|
0.0486 | |
| CY2015Q4 | us-gaap |
Decommissioning Trust Assets Amount
DecommissioningTrustAssetsAmount
|
40000000 | USD |
| CY2016Q4 | us-gaap |
Decommissioning Trust Assets Amount
DecommissioningTrustAssetsAmount
|
41000000 | USD |
| CY2016Q2 | us-gaap |
Deferred Costs Leasing Accumulated Amortization
DeferredCostsLeasingAccumulatedAmortization
|
2000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Costs Leasing Accumulated Amortization
DeferredCostsLeasingAccumulatedAmortization
|
1000000 | 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 |
| CY2016 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
23000000 | USD |
| CY2014 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
39000000 | USD |
| CY2015 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
40000000 | USD |
| CY2016 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
37000000 | 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 |
| CY2016 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
14000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
370000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
330000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Regulatory Assets And Liabilities
DeferredTaxAssetsRegulatoryAssetsAndLiabilities
|
42000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Regulatory Assets And Liabilities
DeferredTaxAssetsRegulatoryAssetsAndLiabilities
|
29000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
|
170000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
|
181000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Other
DeferredTaxAssetsTaxDeferredExpenseOther
|
0 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
632000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
669000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Gross Noncurrent
DeferredTaxLiabilitiesGrossNoncurrent
|
1002000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Gross Noncurrent
DeferredTaxLiabilitiesGrossNoncurrent
|
999000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
632000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
669000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
1000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
0 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
781000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
829000000 | USD |
| CY2015Q4 | us-gaap |
Deferred Tax Liabilities Regulatory Assets
DeferredTaxLiabilitiesRegulatoryAssets
|
220000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Regulatory Assets
DeferredTaxLiabilitiesRegulatoryAssets
|
170000000 | USD |
| CY2016 | us-gaap |
Defined Benefit Plan Amount To Be Amortized From Accumulated Other Comprehensive Income Loss Next Fiscal Year
DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
|
15000000 | 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 | |
| CY2016 | us-gaap |
Defined Benefit Plan Description Of Direction And Pattern Of Change For Assumed Health Care Cost Trend Rate
DefinedBenefitPlanDescriptionOfDirectionAndPatternOfChangeForAssumedHealthCareCostTrendRate
|
0.065 | |
| CY2016 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents
|
0 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter
DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
|
261000000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months
DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
|
45000000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Five
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
|
50000000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Four
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
|
48000000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Three
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
|
48000000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Two
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
|
46000000 | USD |
| CY2015Q4 | us-gaap |
Defined Benefit Plan Fair Value Of Plan Assets
DefinedBenefitPlanFairValueOfPlanAssets
|
550000000 | USD |
| 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 | |
| CY2016 | us-gaap |
Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year
DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear
|
0.0025 | |
| 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 | |
| CY2016 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate
DefinedBenefitPlanUltimateHealthCareCostTrendRate
|
0.05 | |
| CY2016 | us-gaap |
Defined Benefit Plans Estimated Future Employer Contributions In Next Fiscal Year
DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
|
3000000 | 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 |
| CY2016 | us-gaap |
Defined Contribution Plan Employer Discretionary Contribution Amount
DefinedContributionPlanEmployerDiscretionaryContributionAmount
|
19000000 | USD |
| CY2016Q4 | us-gaap |
Deposit Assets
DepositAssets
|
0 | USD |
| CY2014 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
301000000 | USD |
| CY2015 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
305000000 | USD |
| CY2016 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
321000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
|
0 | USD |
| CY2016Q4 | us-gaap |
Derivative Assets Noncurrent
DerivativeAssetsNoncurrent
|
5000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Collateral Right To Reclaim Cash
DerivativeCollateralRightToReclaimCash
|
14000000 | USD |
| CY2016Q4 | us-gaap |
Derivative Collateral Right To Reclaim Cash
DerivativeCollateralRightToReclaimCash
|
11000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral
DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
|
111000000 | USD |
| CY2016Q4 | us-gaap |
Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral
DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
|
115000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
130000000 | USD |
| CY2016Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
44000000 | USD |
| CY2015Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
161000000 | USD |
| CY2016Q4 | us-gaap |
Derivative Liabilities Noncurrent
DerivativeLiabilitiesNoncurrent
|
125000000 | USD |
| CY2016Q4 | us-gaap |
Derivative Net Liability Position Aggregate Fair Value
DerivativeNetLiabilityPositionAggregateFairValue
|
164000000 | USD |
| CY2015Q4 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
28000000 | USD |
| CY2016Q4 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
30000000 | USD |
| CY2014Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
28000000 | USD |
| CY2016Q4 | us-gaap |
Dividends Payable Current And Noncurrent
DividendsPayableCurrentAndNoncurrent
|
30000000 | USD |
| CY2014 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.24 | |
| CY2015 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.05 | |
| CY2016 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.17 | |
| CY2014 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.18 | |
| CY2015 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.04 | |
| CY2016 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.16 | |
| CY2014 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.260 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.207 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.206 | |
| 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 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| 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 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.002 | |
| 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 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
-0.012 | |
| 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 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.048 | |
| 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 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Other
EffectiveIncomeTaxRateReconciliationTaxCreditsOther
|
0.182 | |
| CY2014 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
257000000 | USD |
| CY2015 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
266000000 | USD |
| CY2016 | us-gaap |
Electric Production Expense
ElectricProductionExpense
|
286000000 | USD |
| CY2014 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1900000000 | USD |
| CY2015 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1898000000 | USD |
| CY2016 | us-gaap |
Electric Utility Revenue
ElectricUtilityRevenue
|
1923000000 | USD |
| CY2015Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
51000000 | USD |
| CY2016Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
52000000 | 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 |
| CY2016 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
0 | USD |
| CY2016Q4 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
6000000 | USD |
| CY2015Q4 | us-gaap |
Energy Related Inventory
EnergyRelatedInventory
|
39000000 | USD |
| CY2016Q4 | us-gaap |
Energy Related Inventory
EnergyRelatedInventory
|
32000000 | USD |
| CY2015 | 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 |
| CY2016 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
|
1000000 | USD |
| CY2015 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
|
0 | USD |
| CY2016 | 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 Out Of Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
|
61000000 | USD |
| CY2016 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
|
10000000 | USD |
| CY2015Q4 | us-gaap |
Financial Instruments Owned At Fair Value
FinancialInstrumentsOwnedAtFairValue
|
21000000 | USD |
| CY2016Q4 | us-gaap |
Financial Instruments Owned At Fair Value
FinancialInstrumentsOwnedAtFairValue
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
227000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
257000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
|
45000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
|
22000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
|
34000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
|
38000000 | USD |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
|
44000000 | USD |
| CY2016Q4 | us-gaap |
Gain Contingency Unrecorded Amount
GainContingencyUnrecordedAmount
|
200000000 | USD |
| CY2014 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-10000000 | USD |
| CY2015 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-2000000 | USD |
| CY2016 | us-gaap |
Gain Loss On Contract Termination
GainLossOnContractTermination
|
-2000000 | USD |
| CY2016 | us-gaap |
Gain Loss Related To Litigation Settlement
GainLossRelatedToLitigationSettlement
|
2000000 | USD |
| CY2014 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
227000000 | USD |
| CY2015 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
241000000 | USD |
| CY2016 | us-gaap |
General And Administrative Expense
GeneralAndAdministrativeExpense
|
247000000 | 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 |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
|
243000000 | USD |
| CY2014 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
61000000 | USD |
| CY2015 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
45000000 | USD |
| CY2016 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
50000000 | USD |
| CY2014 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
22000000 | USD |
| CY2015 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
3000000 | USD |
| CY2016 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
16000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-13000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
6000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
15000000 | 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 |
| CY2016 | us-gaap |
Increase Decrease In Customer Advances And Deposits
IncreaseDecreaseInCustomerAdvancesAndDeposits
|
-6000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-8000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-9000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Deferred Compensation
IncreaseDecreaseInDeferredCompensation
|
-10000000 | 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 |
| CY2016 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
-25000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
10000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
7000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
20000000 | 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 |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
|
4000000 | USD |
| CY2014 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
0 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
-23000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Receivables
IncreaseDecreaseInOtherReceivables
|
0 | USD |
| CY2014 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
-8000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
11000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
9000000 | USD |
| CY2014 | us-gaap |
Interest Expense
InterestExpense
|
96000000 | USD |
| CY2015 | us-gaap |
Interest Expense
InterestExpense
|
114000000 | USD |
| CY2016 | us-gaap |
Interest Expense
InterestExpense
|
112000000 | USD |
| us-gaap |
Interest Expense Lessee Assets Under Capital Lease
InterestExpenseLesseeAssetsUnderCapitalLease
|
3000000 | USD | |
| CY2016Q4 | us-gaap |
Interest Expense Lessee Assets Under Capital Lease
InterestExpenseLesseeAssetsUnderCapitalLease
|
2000000 | USD |
| CY2014 | us-gaap |
Interest Paid Net
InterestPaidNet
|
86000000 | USD |
| CY2015 | us-gaap |
Interest Paid Net
InterestPaidNet
|
108000000 | USD |
| CY2016 | us-gaap |
Interest Paid Net
InterestPaidNet
|
104000000 | USD |
| CY2015Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
25000000 | USD |
| CY2016Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
25000000 | USD |
| CY2015Q4 | us-gaap |
Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
|
2000000 | USD |
| CY2016Q4 | us-gaap |
Investments Fair Value Disclosure
InvestmentsFairValueDisclosure
|
2000000 | USD |
| CY2016Q4 | us-gaap |
Jointly Owned Utility Plant Gross Ownership Amount Of Plant In Service
JointlyOwnedUtilityPlantGrossOwnershipAmountOfPlantInService
|
1297000000 | USD |
| CY2016Q4 | us-gaap |
Jointly Owned Utility Plant Ownership Amount Of Construction Work In Progress
JointlyOwnedUtilityPlantOwnershipAmountOfConstructionWorkInProgress
|
14000000 | USD |
| CY2016Q4 | us-gaap |
Jointly Owned Utility Plant Ownership Amount Of Plant Accumulated Depreciation
JointlyOwnedUtilityPlantOwnershipAmountOfPlantAccumulatedDepreciation
|
805000000 | USD |
| CY2014 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
11000000 | USD |
| CY2015 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
0 | USD |
| CY2016 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
10000000 | USD |
| CY2015Q4 | us-gaap |
Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
|
63000000 | USD |
| CY2016Q4 | us-gaap |
Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
|
17000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities
Liabilities
|
4952000000 | USD |
| CY2016Q4 | us-gaap |
Liabilities
Liabilities
|
5183000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
7210000000 | USD |
| CY2016Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
7527000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
626000000 | USD |
| CY2016Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
577000000 | USD |
| CY2015Q4 | us-gaap |
Liabilities Fair Value Disclosure
LiabilitiesFairValueDisclosure
|
291000000 | USD |
| CY2016Q4 | us-gaap |
Liabilities Fair Value Disclosure
LiabilitiesFairValueDisclosure
|
169000000 | USD |
| CY2016Q4 | us-gaap |
Liability For Title Claims And Claims Adjustment Expense
LiabilityForTitleClaimsAndClaimsAdjustmentExpense
|
17000000 | USD |
| CY2016Q4 | us-gaap |
Line Of Credit
LineOfCredit
|
0 | USD |
| CY2016 | us-gaap |
Line Of Credit Facility Commitment Fee Percentage
LineOfCreditFacilityCommitmentFeePercentage
|
0 | |
| CY2016Q4 | us-gaap |
Line Of Credit Facility Interest Rate At Period End
LineOfCreditFacilityInterestRateAtPeriodEnd
|
0.0137 | |
| CY2016 | us-gaap |
Line Of Credit Facility Interest Rate During Period
LineOfCreditFacilityInterestRateDuringPeriod
|
0.0137 | |
| CY2016Q4 | us-gaap |
Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
|
500000000 | USD |
| CY2016Q4 | us-gaap |
Line Of Credit Facility Remaining Borrowing Capacity
LineOfCreditFacilityRemainingBorrowingCapacity
|
500000000 | USD |
| CY2016Q4 | us-gaap |
Litigation Settlement Amount
LitigationSettlementAmount
|
1000000 | USD |
| CY2016 | us-gaap |
Litigation Settlement Amount
LitigationSettlementAmount
|
79000000 | USD |
| CY2016 | us-gaap |
Litigation Settlement Expense
LitigationSettlementExpense
|
115000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt
LongTermDebt
|
2204000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt
LongTermDebt
|
2361000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
133000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
150000000 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Fair Value
LongTermDebtFairValue
|
2455000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Fair Value
LongTermDebtFairValue
|
2693000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal After Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
|
1751000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
|
150000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
|
160000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Four
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
|
0 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
|
300000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
|
0 | USD |
| CY2015Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2060000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2200000000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Percentage Bearing Fixed Interest Rate
LongTermDebtPercentageBearingFixedInterestRate
|
63 | |
| CY2016Q4 | us-gaap |
Long Term Line Of Credit
LongTermLineOfCredit
|
200000000 | USD |
| CY2016 | us-gaap |
Long Term Purchase Commitment Amount
LongTermPurchaseCommitmentAmount
|
128000000 | USD |
| CY2015Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
142000000 | USD |
| CY2016Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
142000000 | USD |
| CY2016Q4 | us-gaap |
Loss Contingency Accrual At Carrying Value
LossContingencyAccrualAtCarryingValue
|
0 | USD |
| CY2013Q3 | us-gaap |
Loss Contingency Damages Awarded Value
LossContingencyDamagesAwardedValue
|
81000000 | USD |
| CY2016 | us-gaap |
Loss Contingency Damages Sought Value
LossContingencyDamagesSoughtValue
|
1200000000 | USD |
| CY2016Q4 | us-gaap |
Loss Contingency Estimate Of Possible Loss
LossContingencyEstimateOfPossibleLoss
|
1700000000 | USD |
| CY2016Q4 | us-gaap |
Loss Contingency Range Of Possible Loss Portion Not Accrued
LossContingencyRangeOfPossibleLossPortionNotAccrued
|
500000000 | USD |
| CY2016Q4 | us-gaap |
Malpractice Loss Contingency Letters Of Credit And Surety Bonds
MalpracticeLossContingencyLettersOfCreditAndSuretyBonds
|
145600000 | USD |
| CY2015Q4 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
33000000 | USD |
| CY2016Q4 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
8000000 | USD |
| CY2015Q4 | us-gaap |
Money Market Funds At Carrying Value
MoneyMarketFundsAtCarryingValue
|
18000000 | USD |
| CY2016Q4 | us-gaap |
Money Market Funds At Carrying Value
MoneyMarketFundsAtCarryingValue
|
21000000 | USD |
| CY2014 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
494000000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
-121000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
34000000 | 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 |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-585000000 | USD |
| CY2014 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
520000000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
520000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
553000000 | USD |
| CY2014 | us-gaap |
Net Income Loss
NetIncomeLoss
|
175000000 | USD |
| CY2015 | us-gaap |
Net Income Loss
NetIncomeLoss
|
172000000 | USD |
| CY2016 | us-gaap |
Net Income Loss
NetIncomeLoss
|
193000000 | 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 |
| CY2016 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
0 | USD |
| CY2014 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
38000000 | USD |
| CY2015 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
22000000 | USD |
| CY2016 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
22000000 | USD |
| CY2014 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
293000000 | USD |
| CY2015 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
309000000 | USD |
| CY2016 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
333000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due
OperatingLeasesFutureMinimumPaymentsDue
|
215000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
|
10000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
|
7000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
|
6000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
|
9000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Thereafter
OperatingLeasesFutureMinimumPaymentsDueThereafter
|
177000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable Current
OperatingLeasesFutureMinimumPaymentsReceivableCurrent
|
4000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Five Years
OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears
|
3000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Four Years
OperatingLeasesFutureMinimumPaymentsReceivableInFourYears
|
3000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Three Years
OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears
|
3000000 | USD |
| CY2016Q4 | us-gaap |
Operating Leases Future Minimum Payments Receivable In Two Years
OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears
|
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 |
| CY2016 | us-gaap |
Operating Leases Rent Expense Sublease Rentals1
OperatingLeasesRentExpenseSubleaseRentals1
|
4000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
88000000 | USD |
| CY2016Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
77000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Miscellaneous
OtherAssetsMiscellaneous
|
2000000 | USD |
| CY2016Q4 | us-gaap |
Other Assets Miscellaneous
OtherAssetsMiscellaneous
|
3000000 | USD |
| CY2015Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
44000000 | USD |
| CY2016Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
57000000 | 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 |
| CY2016 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
1000000 | USD |
| CY2015Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
44000000 | USD |
| CY2016Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
50000000 | USD |
| CY2015Q4 | us-gaap |
Other Investments
OtherInvestments
|
0 | USD |
| CY2016Q4 | us-gaap |
Other Investments
OtherInvestments
|
1000000 | USD |
| CY2015Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
259000000 | USD |
| CY2016Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
254000000 | USD |
| CY2015Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
29000000 | USD |
| CY2016Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
107000000 | USD |
| CY2014 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-14000000 | USD |
| CY2015 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-20000000 | USD |
| CY2016 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-5000000 | USD |
| CY2014 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1000000 | USD |
| CY2015 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1000000 | USD |
| CY2016 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1000000 | USD |
| CY2015Q4 | us-gaap |
Other Postretirement Defined Benefit Plan Liabilities Noncurrent
OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent
|
106000000 | USD |
| CY2016Q4 | us-gaap |
Other Postretirement Defined Benefit Plan Liabilities Noncurrent
OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent
|
105000000 | USD |
| CY2014 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
6000000 | USD |
| CY2015 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
-50000000 | USD |
| CY2016 | us-gaap |
Payments For Proceeds From Investments
PaymentsForProceedsFromInvestments
|
0 | USD |
| CY2014 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-13000000 | USD |
| CY2015 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
0 | USD |
| CY2016 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
3000000 | USD |
| CY2014 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
87000000 | USD |
| CY2015 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
97000000 | USD |
| CY2016 | us-gaap |
Payments Of Dividends
PaymentsOfDividends
|
110000000 | 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 |
| CY2016 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
584000000 | 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 |
| CY2016 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
25000000 | 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 |
| CY2016 | us-gaap |
Pension And Other Postretirement Benefit Expense
PensionAndOtherPostretirementBenefitExpense
|
28000000 | USD |
| CY2015Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
259000000 | USD |
| CY2016Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
281000000 | USD |
| CY2014 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2015 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2016 | us-gaap |
Pension Contributions
PensionContributions
|
0 | USD |
| CY2016Q4 | us-gaap |
Pledged Financial Instruments Not Separately Reported Securities For Letter Of Credit Facilities
PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForLetterOfCreditFacilities
|
56000000 | USD |
| CY2015Q4 | us-gaap |
Preferred Stock No Par Value
PreferredStockNoParValue
|
0 | |
| CY2016Q4 | us-gaap |
Preferred Stock No Par Value
PreferredStockNoParValue
|
0 | |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
30000000 | shares |
| CY2016Q4 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
30000000 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2016Q4 | us-gaap |
Preferred Stock Shares Issued
PreferredStockSharesIssued
|
0 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | shares |
| CY2016Q4 | us-gaap |
Preferred Stock Shares Outstanding
PreferredStockSharesOutstanding
|
0 | shares |
| CY2015Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
0 | USD |
| CY2016Q4 | us-gaap |
Preferred Stock Value
PreferredStockValue
|
0 | USD |
| CY2015Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
43000000 | USD |
| CY2016Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
48000000 | USD |
| CY2015Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
|
10000000 | USD |
| CY2016Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
|
23000000 | USD |
| CY2015Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
|
291000000 | USD |
| CY2016Q4 | us-gaap |
Price Risk Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value
PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
|
169000000 | USD |
| CY2015 | us-gaap |
Proceeds And Excess Tax Benefit From Sharebased Compensation
ProceedsAndExcessTaxBenefitFromSharebasedCompensation
|
2000000 | USD |
| CY2016 | us-gaap |
Proceeds And Excess Tax Benefit From Sharebased Compensation
ProceedsAndExcessTaxBenefitFromSharebasedCompensation
|
3000000 | USD |
| CY2016 | us-gaap |
Proceeds From Decommissioning Fund
ProceedsFromDecommissioningFund
|
50000000 | USD |
| CY2014 | us-gaap |
Proceeds From Insurance Settlement Investing Activities
ProceedsFromInsuranceSettlementInvestingActivities
|
3000000 | USD |
| CY2013Q3 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
20000000 | USD |
| CY2014 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
0 | USD |
| CY2015Q2 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
271000000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
271000000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
0 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of First Mortgage Bond
ProceedsFromIssuanceOfFirstMortgageBond
|
140000000 | USD |
| CY2016Q1 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
140000000 | USD |
| CY2014 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
585000000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
145000000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
290000000 | USD |
| CY2014 | us-gaap |
Proceeds From Legal Settlements
ProceedsFromLegalSettlements
|
6000000 | USD |
| CY2014 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-4000000 | USD |
| CY2015 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-4000000 | USD |
| CY2016 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-7000000 | USD |
| CY2014 | us-gaap |
Proceeds From Repayments Of Commercial Paper
ProceedsFromRepaymentsOfCommercialPaper
|
0 | USD |
| CY2015 | us-gaap |
Proceeds From Repayments Of Commercial Paper
ProceedsFromRepaymentsOfCommercialPaper
|
6000000 | USD |
| CY2016 | us-gaap |
Proceeds From Repayments Of Commercial Paper
ProceedsFromRepaymentsOfCommercialPaper
|
-6000000 | 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 |
| CY2016 | us-gaap |
Proceeds From Sale Maturity And Collections Of Investments
ProceedsFromSaleMaturityAndCollectionsOfInvestments
|
27000000 | USD |
| CY2014 | us-gaap |
Proceeds From Sale Of Productive Assets
ProceedsFromSaleOfProductiveAssets
|
5000000 | USD |
| CY2014 | us-gaap |
Profit Loss
ProfitLoss
|
174000000 | USD |
| CY2015 | us-gaap |
Profit Loss
ProfitLoss
|
172000000 | USD |
| CY2016 | us-gaap |
Profit Loss
ProfitLoss
|
193000000 | USD |
| CY2014 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
6000000 | USD |
| CY2015 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
6000000 | USD |
| CY2016 | us-gaap |
Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
|
5000000 | 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 |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
21000000 | 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 |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
11000000 | USD |
| 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 | |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Rate
PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate
|
0.073 | |
| 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 | |
| CY2016 | us-gaap |
Public Utilities Approved Return On Equity Percentage
PublicUtilitiesApprovedReturnOnEquityPercentage
|
0.096 | |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
3093000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
3313000000 | USD |
| CY2016Q3 | us-gaap |
Public Utilities Property Plant And Equipment Amount Of Construction Work In Process Included In Rate Base
PublicUtilitiesPropertyPlantAndEquipmentAmountOfConstructionWorkInProcessIncludedInRateBase
|
514000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Construction Work In Progress
PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
|
545000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Construction Work In Progress
PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
|
213000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
3192000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
3343000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
3898000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
4597000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
6012000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
6434000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
9105000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
9747000000 | USD |
| CY2015Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
451000000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
521000000 | USD |
| CY2016Q4 | us-gaap |
Purchase Commitment Remaining Minimum Amount Committed
PurchaseCommitmentRemainingMinimumAmountCommitted
|
51000000 | USD |
| CY2016Q4 | us-gaap |
Ratio Of Indebtedness To Net Capital1
RatioOfIndebtednessToNetCapital1
|
0.510 | |
| CY2015Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
129000000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
36000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
524000000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
498000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
55000000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
51000000 | USD |
| CY2015Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
928000000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
958000000 | USD |
| CY2016Q1 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
133000000 | USD |
| CY2016Q1 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
58000000 | USD |
| CY2016 | us-gaap |
Repayments Of Debt
RepaymentsOfDebt
|
75000000 | USD |
| CY2014 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
0 | USD |
| CY2015 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
442000000 | USD |
| CY2016 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
133000000 | USD |
| CY2015Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1070000000 | USD |
| CY2016Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1150000000 | USD |
| CY2014 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
6000000 | USD |
| CY2015 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
6000000 | USD |
| CY2016 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
6000000 | USD |
| 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 |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
|
3044 | shares |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
|
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 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
|
28.62 | |
| 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 |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
|
193734 | shares |
| 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 | |
| CY2016 | 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
|
35.89 | |
| 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 |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
|
458792 | shares |
| CY2013Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
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 | |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
|
34.68 | |
| 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
|
0 | USD |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Share Based Liabilities Paid
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid
|
1000000 | USD |
| 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 |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
|
174891 | shares |
| 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 |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
|
5000000 | USD |
| CY2014 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
|
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 | |
| CY2016 | 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
|
31.47 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
|
0 | |
| CY2016 | 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 Volatility Rate Maximum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
|
0.192 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Maximum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum
|
0.259 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.132 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
|
0.145 | |
| CY2015 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
|
0.010 | |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
|
0.009 | |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
|
4687500 | shares |
| CY2016Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
|
3305920 | shares |
| 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 | |
| CY2016Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.007 | |
| CY2014 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
0 | USD |
| CY2015 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
0 | USD |
| CY2016 | us-gaap |
Shortterm Debt Average Outstanding Amount
ShorttermDebtAverageOutstandingAmount
|
1000000 | USD |
| CY1997 | us-gaap |
Site Contingency Names Of Other Potentially Responsible Parties
SiteContingencyNamesOfOtherPotentiallyResponsibleParties
|
69 | |
| CY2016 | us-gaap |
Site Contingency Names Of Other Potentially Responsible Parties
SiteContingencyNamesOfOtherPotentiallyResponsibleParties
|
100 | |
| CY2015Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
2258000000 | USD |
| CY2016Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
2344000000 | 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 |
| CY2016 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
119000000 | USD |
| CY2015Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
25000000 | USD |
| CY2016Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
25000000 | USD |
| CY2015Q4 | us-gaap |
Us Government Securities At Carrying Value
USGovernmentSecuritiesAtCarryingValue
|
14000000 | USD |
| CY2016Q4 | us-gaap |
Us Government Securities At Carrying Value
USGovernmentSecuritiesAtCarryingValue
|
12000000 | USD |
| CY2015Q4 | us-gaap |
Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
|
11000000 | USD |
| CY2016Q4 | us-gaap |
Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
|
11000000 | USD |
| CY2014 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-7000000 | USD |
| CY2015 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-6000000 | USD |
| CY2016 | us-gaap |
Unrealized Gain Loss On Securities
UnrealizedGainLossOnSecurities
|
-5000000 | USD |
| CY2015Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2016Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2015Q4 | us-gaap |
Unsecured Debt Current
UnsecuredDebtCurrent
|
0 | USD |
| CY2016Q4 | us-gaap |
Unsecured Debt Current
UnsecuredDebtCurrent
|
150000000 | USD |
| 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 |
| CY2016 | us-gaap |
Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
|
158000 | 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 |
| CY2016 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
89054000 | 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 |
| CY2016 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
88896000 | shares |
