2017 Q4 Form 10-K Financial Statement
#000009212219000006 Filed on February 20, 2019
Income Statement
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| Revenue | $5.629B | $6.201B | $5.430B |
| YoY Change | 8.65% | -1.01% | 21.78% |
| Cost Of Revenue | $953.0M | $480.0M | $557.0M |
| YoY Change | 27.41% | 8.11% | 125.51% |
| Gross Profit | $4.675B | $5.721B | $4.873B |
| YoY Change | 5.46% | -1.7% | 15.69% |
| Gross Profit Margin | 83.05% | 92.26% | 89.74% |
| Selling, General & Admin | |||
| YoY Change | |||
| % of Gross Profit | |||
| Research & Development | |||
| YoY Change | |||
| % of Gross Profit | |||
| Depreciation & Amortization | $893.0M | $881.0M | $860.0M |
| YoY Change | 9.71% | 9.71% | 28.94% |
| % of Gross Profit | 19.1% | 15.4% | 17.65% |
| Operating Expenses | $3.750B | $3.696B | $3.510B |
| YoY Change | -0.85% | -3.12% | 19.14% |
| Operating Profit | $739.0M | $1.991B | -$1.649B |
| YoY Change | 25.89% | 3.86% | -239.16% |
| Interest Expense | -$440.0M | -$407.0M | -$424.0M |
| YoY Change | 17.96% | 8.82% | 44.22% |
| % of Operating Profit | -59.54% | -20.44% | |
| Other Income/Expense, Net | $25.00M | -$292.0M | -$286.0M |
| YoY Change | -85.12% | -2.99% | 3.25% |
| Pretax Income | $324.0M | $1.699B | -$1.935B |
| YoY Change | 35.56% | 5.14% | -313.11% |
| Income Tax | $89.00M | $590.0M | -$587.0M |
| % Of Pretax Income | 27.47% | 34.73% | |
| Net Earnings | $496.0M | $1.069B | -$1.381B |
| YoY Change | 138.46% | -9.18% | -313.45% |
| Net Earnings / Revenue | 8.81% | 17.24% | -25.43% |
| Basic Earnings Per Share | $0.49 | $1.07 | -$1.38 |
| Diluted Earnings Per Share | $0.49 | $1.06 | -$1.37 |
| COMMON SHARES | |||
| Basic Shares Outstanding | 1.003B shares | 998.0M shares | |
| Diluted Shares Outstanding | 1.010B shares | 1.005B shares |
Balance Sheet
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $2.130B | $1.841B | $1.433B |
| YoY Change | 7.85% | -31.02% | -24.46% |
| Cash & Equivalents | $2.130B | $1.841B | $1.433B |
| Short-Term Investments | |||
| Other Short-Term Assets | $62.00M | $209.0M | $206.0M |
| YoY Change | -73.04% | 24.4% | 190.14% |
| Inventory | $2.627B | $2.701B | $2.562B |
| Prepaid Expenses | $452.0M | $365.0M | $361.0M |
| Receivables | $1.762B | $1.701B | $1.548B |
| Other Receivables | $1.476B | $1.205B | $1.565B |
| Total Short-Term Assets | $10.07B | $9.202B | $8.837B |
| YoY Change | 3.6% | -4.72% | -41.67% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $79.87B | $79.74B | $78.69B |
| YoY Change | 1.82% | 5.54% | 23.15% |
| Goodwill | $6.268B | $6.267B | $6.271B |
| YoY Change | 0.27% | 0.71% | 2275.38% |
| Intangibles | $873.0M | $902.0M | $929.0M |
| YoY Change | -10.0% | -4.25% | 89.59% |
| Long-Term Investments | $1.513B | $1.637B | $1.632B |
| YoY Change | -2.32% | 6.23% | |
| Other Assets | $1.577B | $1.513B | $1.387B |
| YoY Change | 12.16% | 33.54% | 66.51% |
| Total Long-Term Assets | $100.9B | $101.1B | $99.85B |
| YoY Change | 0.96% | 4.56% | 31.86% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $10.07B | $9.202B | $8.837B |
| Total Long-Term Assets | $100.9B | $101.1B | $99.85B |
| Total Assets | $111.0B | $110.3B | $108.7B |
| YoY Change | 1.19% | 3.72% | 19.6% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $2.530B | $2.353B | $1.920B |
| YoY Change | 13.55% | 35.85% | 28.6% |
| Accrued Expenses | $2.060B | $1.836B | $1.582B |
| YoY Change | -1.9% | 2.74% | 26.46% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $2.439B | $2.579B | $3.274B |
| YoY Change | 8.84% | 54.43% | 138.63% |
| Long-Term Debt Due | $3.892B | $3.505B | $3.031B |
| YoY Change | 50.44% | 55.5% | 11.27% |
| Total Short-Term Liabilities | $13.59B | $12.60B | $12.75B |
| YoY Change | 5.24% | 19.27% | 49.77% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $44.46B | $44.04B | $43.89B |
| YoY Change | 4.3% | 6.0% | 24.08% |
| Other Long-Term Liabilities | $691.0M | $1.048B | $805.0M |
| YoY Change | -21.48% | 63.49% | 11.19% |
| Total Long-Term Liabilities | $691.0M | $1.048B | $805.0M |
| YoY Change | -21.48% | 63.49% | 11.19% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $13.59B | $12.60B | $12.75B |
| Total Long-Term Liabilities | $691.0M | $1.048B | $805.0M |
| Total Liabilities | $85.15B | $83.96B | $83.27B |
| YoY Change | 2.84% | 4.93% | 23.81% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | $8.885B | $8.981B | $8.494B |
| YoY Change | -14.2% | -15.95% | -15.78% |
| Common Stock | $15.51B | $15.32B | $15.10B |
| YoY Change | 6.12% | 8.51% | 23.72% |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | $36.00M | $35.00M | $34.00M |
| YoY Change | 16.13% | 16.67% | 13.33% |
| Treasury Stock Shares | 900.0K shares | 900.0K shares | 900.0K shares |
| Shareholders Equity | $24.17B | $24.08B | $23.37B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $111.0B | $110.3B | $108.7B |
| YoY Change | 1.19% | 3.72% | 19.6% |
Cashflow Statement
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $496.0M | $1.069B | -$1.381B |
| YoY Change | 138.46% | -9.18% | -313.45% |
| Depreciation, Depletion And Amortization | $893.0M | $881.0M | $860.0M |
| YoY Change | 9.71% | 9.71% | 28.94% |
| Cash From Operating Activities | $1.142B | $2.512B | $1.845B |
| YoY Change | 90.97% | 16.51% | 46.2% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | -$2.181B | -$1.844B | -$1.910B |
| YoY Change | 5.98% | 4.42% | 18.34% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $1.677B | $40.00M | -$176.0M |
| YoY Change | -224.22% | -101.82% | -98.01% |
| Cash From Investing Activities | -$504.0M | -$1.804B | -$2.086B |
| YoY Change | -85.21% | -54.5% | -80.09% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | |||
| YoY Change | |||
| Common Stock Issuance & Retirement, Net | |||
| YoY Change | |||
| Debt Paid & Issued, Net | |||
| YoY Change | |||
| Cash From Financing Activities | -349.0M | -305.0M | 580.0M |
| YoY Change | -116.49% | -111.82% | -94.4% |
| NET CHANGE | |||
| Cash From Operating Activities | 1.142B | 2.512B | 1.845B |
| Cash From Investing Activities | -504.0M | -1.804B | -2.086B |
| Cash From Financing Activities | -349.0M | -305.0M | 580.0M |
| Net Change In Cash | 289.0M | 403.0M | 339.0M |
| YoY Change | -141.64% | -47.8% | -70.34% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $1.142B | $2.512B | $1.845B |
| Capital Expenditures | -$2.181B | -$1.844B | -$1.910B |
| Free Cash Flow | $3.323B | $4.356B | $3.755B |
| YoY Change | 25.11% | 11.07% | 30.56% |
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34025000000 | USD |
| CY2018 | so |
Loss Contingency Insurance Coverage Minimum
LossContingencyInsuranceCoverageMinimum
|
11000000 | USD |
| CY2018 | so |
Maximum Aggregate Amount For Each Incident
MaximumAggregateAmountForEachIncident
|
20000000 | USD |
| CY2018 | so |
Maximum Amount For Each Licensed Reactor
MaximumAmountForEachLicensedReactor
|
138000000 | USD |
| CY2018 | so |
Maximum Coverage Per Occurrence Per Unit Limit To Obtain Replacement Power
MaximumCoveragePerOccurrencePerUnitLimitToObtainReplacementPower
|
490000000 | USD |
| CY2018 | so |
Maximum Deductible Waiting Period
MaximumDeductibleWaitingPeriod
|
26 weeks | |
| CY2018 | so |
Maximum Fund Provided For Public Liability Claims
MaximumFundProvidedForPublicLiabilityClaims
|
14100000000 | USD |
| CY2018 | so |
Maximum Insurance Coverage
MaximumInsuranceCoverage
|
450000000 | USD |
| CY2017Q4 | so |
Minority Interest In Percent Of Capitalization
MinorityInterestInPercentOfCapitalization
|
0.019 | |
| CY2018Q4 | so |
Minority Interest In Percent Of Capitalization
MinorityInterestInPercentOfCapitalization
|
0.062 | |
| CY2016 | so |
Noncontrolling Interest Increasefrom Contributionsfrom Noncontrolling Interest Holders
NoncontrollingInterestIncreasefromContributionsfromNoncontrollingInterestHolders
|
618000000 | USD |
| CY2017 | so |
Noncontrolling Interest Increasefrom Contributionsfrom Noncontrolling Interest Holders
NoncontrollingInterestIncreasefromContributionsfromNoncontrollingInterestHolders
|
79000000 | USD |
| CY2018 | so |
Noncontrolling Interest Increasefrom Contributionsfrom Noncontrolling Interest Holders
NoncontrollingInterestIncreasefromContributionsfromNoncontrollingInterestHolders
|
1372000000 | USD |
| CY2017Q4 | so |
Nuclear Fuel At Amortized Cost
NuclearFuelAtAmortizedCost
|
883000000 | USD |
| CY2018Q4 | so |
Nuclear Fuel At Amortized Cost
NuclearFuelAtAmortizedCost
|
875000000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
29000000 | USD |
| CY2017Q4 | so |
Unbilled Revenues Current
UnbilledRevenuesCurrent
|
810000000 | USD |
| CY2018Q4 | so |
Unbilled Revenues Current
UnbilledRevenuesCurrent
|
654000000 | USD |
| CY2018Q4 | so |
Number Of Employees Participatingin Stock Optionand Performance Share Units Program
NumberOfEmployeesParticipatinginStockOptionandPerformanceShareUnitsProgram
|
4716 | employee |
| CY2018Q3 | so |
Number Of Natural Gas Distributions Utilities Sold
NumberOfNaturalGasDistributionsUtilitiesSold
|
3 | utility |
| CY2017Q4 | so |
Other Accounts Notes And Loans Receivable
OtherAccountsNotesAndLoansReceivable
|
698000000 | USD |
| CY2018Q4 | so |
Other Accounts Notes And Loans Receivable
OtherAccountsNotesAndLoansReceivable
|
813000000 | USD |
| CY2017Q4 | so |
Other Cost Of Removal Obligations
OtherCostOfRemovalObligations
|
2684000000 | USD |
| CY2018Q4 | so |
Other Cost Of Removal Obligations
OtherCostOfRemovalObligations
|
2297000000 | USD |
| CY2017Q4 | so |
Other Regulatory Assets Current
OtherRegulatoryAssetsCurrent
|
604000000 | USD |
| CY2018Q4 | so |
Other Regulatory Assets Current
OtherRegulatoryAssetsCurrent
|
525000000 | USD |
| CY2017Q4 | so |
Other Regulatory Assets Deferred
OtherRegulatoryAssetsDeferred
|
6943000000 | USD |
| CY2018Q4 | so |
Other Regulatory Assets Deferred
OtherRegulatoryAssetsDeferred
|
8308000000 | USD |
| CY2017Q4 | so |
Other Regulatory Liabilities Current
OtherRegulatoryLiabilitiesCurrent
|
337000000 | USD |
| CY2018Q4 | so |
Other Regulatory Liabilities Current
OtherRegulatoryLiabilitiesCurrent
|
376000000 | USD |
| CY2017Q4 | so |
Other Regulatory Liabilities Deferred
OtherRegulatoryLiabilitiesDeferred
|
239000000 | USD |
| CY2018Q4 | so |
Other Regulatory Liabilities Deferred
OtherRegulatoryLiabilitiesDeferred
|
169000000 | USD |
| CY2018 | so |
Period Over Which Company Has Elected To Amortize Changes In Market Value Of All Plan Assets
PeriodOverWhichCompanyHasElectedToAmortizeChangesInMarketValueOfAllPlanAssets
|
P5Y | |
| CY2017Q4 | so |
Plant In Service Net Of Depreciation
PlantInServiceNetOfDepreciation
|
72085000000 | USD |
| CY2018Q4 | so |
Plant In Service Net Of Depreciation
PlantInServiceNetOfDepreciation
|
72668000000 | USD |
| CY2016 | so |
Prepaid Long Term Service Agreement
PrepaidLongTermServiceAgreement
|
134000000 | USD |
| CY2017 | so |
Prepaid Long Term Service Agreement
PrepaidLongTermServiceAgreement
|
227000000 | USD |
| CY2018 | so |
Prepaid Long Term Service Agreement
PrepaidLongTermServiceAgreement
|
186000000 | USD |
| CY2016 | so |
Proceeds From Guarantee Obligation
ProceedsFromGuaranteeObligation
|
0 | USD |
| CY2017 | so |
Proceeds From Guarantee Obligation
ProceedsFromGuaranteeObligation
|
1682000000 | USD |
| CY2018 | so |
Proceeds From Guarantee Obligation
ProceedsFromGuaranteeObligation
|
0 | USD |
| CY2017Q4 | so |
Public Utilities Property Plant And Equipment Other
PublicUtilitiesPropertyPlantAndEquipmentOther
|
1155000000 | USD |
| CY2018Q4 | so |
Public Utilities Property Plant And Equipment Other
PublicUtilitiesPropertyPlantAndEquipmentOther
|
1128000000 | USD |
| CY2017Q4 | so |
Public Utilities Property Plantand Equipment General
PublicUtilitiesPropertyPlantandEquipmentGeneral
|
4402000000 | USD |
| CY2018Q4 | so |
Public Utilities Property Plantand Equipment General
PublicUtilitiesPropertyPlantandEquipmentGeneral
|
4446000000 | USD |
| CY2017Q4 | so |
Public Utilities Property Plantand Equipment Storage Facilities
PublicUtilitiesPropertyPlantandEquipmentStorageFacilities
|
1599000000 | USD |
| CY2018Q4 | so |
Public Utilities Property Plantand Equipment Storage Facilities
PublicUtilitiesPropertyPlantandEquipmentStorageFacilities
|
1640000000 | USD |
| CY2017Q4 | so |
Public Utilities Property Plantand Equipment Transportationand Distribution
PublicUtilitiesPropertyPlantandEquipmentTransportationandDistribution
|
13079000000 | USD |
| CY2018Q4 | so |
Public Utilities Property Plantand Equipment Transportationand Distribution
PublicUtilitiesPropertyPlantandEquipmentTransportationandDistribution
|
12409000000 | USD |
| CY2018Q4 | so |
Ratio Of Indebtedness To Capitalization Covenant
RatioOfIndebtednessToCapitalizationCovenant
|
0.70 | |
| CY2018Q4 | so |
Ratio Of Indebtedness To Capitalization Covenant
RatioOfIndebtednessToCapitalizationCovenant
|
0.7 | |
| CY2017 | so |
Reclassificationfrom Redeemable Noncontrolling Interests
ReclassificationfromRedeemableNoncontrollingInterests
|
114000000 | USD |
| CY2018 | so |
Remarketed Pollution Control Bonds
RemarketedPollutionControlBonds
|
403000000 | USD |
| CY2017Q4 | so |
Required Collateral Credit Rating Downgrade
RequiredCollateralCreditRatingDowngrade
|
8000000 | USD |
| CY2018Q4 | so |
Required Collateral Credit Rating Downgrade
RequiredCollateralCreditRatingDowngrade
|
30000000 | USD |
| CY2017Q4 | so |
Revenue Bonds
RevenueBonds
|
90000000 | USD |
| CY2018Q4 | so |
Revenue Bonds
RevenueBonds
|
173000000 | USD |
| CY2018 | so |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Reserved For Issuance Pursuant To Stock Based Compensation Plan
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesReservedForIssuancePursuantToStockBasedCompensationPlan
|
92000000 | shares |
| CY2018 | so |
Significantly Increase Or Decrease In Amount Of Unrecognized Tax Benefits
SignificantlyIncreaseOrDecreaseInAmountOfUnrecognizedTaxBenefits
|
P12M | |
| CY2018 | so |
Stock Issued During Period Shares Company Investment Plan And Employee And Director Stock Plans
StockIssuedDuringPeriodSharesCompanyInvestmentPlanAndEmployeeAndDirectorStockPlans
|
11600000 | shares |
| CY2017Q4 | so |
Tax Cuts And Jobs Act Of2017 Income Tax Expense Benefit
TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit
|
264000000 | USD |
| CY2016Q4 | so |
Tax Positions Not Impacting Effective Tax Rate
TaxPositionsNotImpactingEffectiveTaxRate
|
464000000 | USD |
| CY2017Q4 | so |
Tax Positions Not Impacting Effective Tax Rate
TaxPositionsNotImpactingEffectiveTaxRate
|
0 | USD |
| CY2017Q4 | so |
Temporary Equity Carrying Amount In Percent Of Capitalization
TemporaryEquityCarryingAmountInPercentOfCapitalization
|
0.005 | |
| CY2018Q4 | so |
Temporary Equity Carrying Amount In Percent Of Capitalization
TemporaryEquityCarryingAmountInPercentOfCapitalization
|
0.004 | |
| CY2017 | us-gaap |
Asset Retirement Obligation Cash Paid To Settle
AssetRetirementObligationCashPaidToSettle
|
177000000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Cash Paid To Settle
AssetRetirementObligationCashPaidToSettle
|
244000000 | USD |
| CY2017Q4 | us-gaap |
Asset Retirement Obligation Current
AssetRetirementObligationCurrent
|
351000000 | USD |
| CY2018Q4 | us-gaap |
Asset Retirement Obligation Current
AssetRetirementObligationCurrent
|
404000000 | USD |
| CY2018 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
449000000 | USD |
| CY2016 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
-148000000 | USD |
| CY2018 | so |
Uncollectible Accounts
UncollectibleAccounts
|
0.01 | |
| CY2017Q4 | so |
Under Recovered Regulatory Clause Revenues
UnderRecoveredRegulatoryClauseRevenues
|
171000000 | USD |
| CY2018Q4 | so |
Under Recovered Regulatory Clause Revenues
UnderRecoveredRegulatoryClauseRevenues
|
115000000 | USD |
| CY2018 | so |
Undistributed Retained Earnings Of Subsidiaries
UndistributedRetainedEarningsOfSubsidiaries
|
4900000000 | USD |
| CY2017Q4 | so |
Utility Plant In Service
UtilityPlantInService
|
15833000000 | USD |
| CY2018Q4 | so |
Utility Plant In Service
UtilityPlantInService
|
15177000000 | USD |
| CY2017Q4 | so |
Weather Derivative Premium
WeatherDerivativePremium
|
11000000 | USD |
| CY2018Q4 | so |
Weather Derivative Premium
WeatherDerivativePremium
|
8000000 | USD |
| CY2017Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
2530000000 | USD |
| CY2018Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
2580000000 | USD |
| CY2017Q4 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
1806000000 | USD |
| CY2018Q4 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
1726000000 | USD |
| CY2018Q4 | us-gaap |
Accounts Receivable Net
AccountsReceivableNet
|
2630000000 | USD |
| CY2017Q4 | us-gaap |
Accrued Environmental Loss Contingencies Noncurrent
AccruedEnvironmentalLossContingenciesNoncurrent
|
389000000 | USD |
| CY2018Q4 | us-gaap |
Accrued Environmental Loss Contingencies Noncurrent
AccruedEnvironmentalLossContingenciesNoncurrent
|
268000000 | USD |
| CY2017Q4 | us-gaap |
Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
|
636000000 | USD |
| CY2018Q4 | us-gaap |
Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
|
656000000 | USD |
| CY2017Q4 | us-gaap |
Accrued Salaries Current
AccruedSalariesCurrent
|
959000000 | USD |
| CY2018Q4 | us-gaap |
Accrued Salaries Current
AccruedSalariesCurrent
|
1030000000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
|
2267000000 | USD |
| CY2018Q4 | us-gaap |
Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
|
2372000000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
31457000000 | USD |
| CY2018Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
31038000000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-189000000 | USD |
| CY2018Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-203000000 | USD |
| CY2017Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
10469000000 | USD |
| CY2018Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
11094000000 | USD |
| CY2016 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
120000000 | USD |
| CY2017 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
105000000 | USD |
| CY2018 | us-gaap |
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
|
84000000 | USD |
| CY2017Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
44000000 | USD |
| CY2018Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
50000000 | USD |
| CY2016 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
50000000 | USD |
| CY2017 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
124000000 | USD |
| CY2018 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
89000000 | USD |
| CY2016 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
0 | USD |
| CY2017 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
0 | USD |
| CY2018 | us-gaap |
Asset Impairment Charges
AssetImpairmentCharges
|
210000000 | USD |
| CY2016Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
4514000000 | USD |
| CY2017Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
4824000000 | USD |
| CY2018Q4 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
9394000000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
179000000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
217000000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Cash Paid To Settle
AssetRetirementObligationCashPaidToSettle
|
171000000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
16000000 | USD |
| CY2017 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
1000000000 | shares |
| CY2017Q4 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.58 | |
| CY2017 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
2.3000 | |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
177000000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
244000000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
292000000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
4737000000 | USD |
| CY2017Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
4473000000 | USD |
| CY2018Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
8990000000 | USD |
| CY2016Q4 | us-gaap |
Assets
Assets
|
109697000000 | USD |
| CY2017Q4 | us-gaap |
Assets
Assets
|
111005000000 | USD |
| CY2018Q4 | us-gaap |
Assets
Assets
|
116914000000 | USD |
| CY2017Q4 | us-gaap |
Assets Current
AssetsCurrent
|
10072000000 | USD |
| CY2018Q4 | us-gaap |
Assets Current
AssetsCurrent
|
9583000000 | USD |
| CY2017Q4 | us-gaap |
Assets Held For Sale Not Part Of Disposal Group Current
AssetsHeldForSaleNotPartOfDisposalGroupCurrent
|
12000000 | USD |
| CY2018Q4 | us-gaap |
Assets Held For Sale Not Part Of Disposal Group Current
AssetsHeldForSaleNotPartOfDisposalGroupCurrent
|
393000000 | USD |
| CY2018 | us-gaap |
Business Combination Consideration Transferred1
BusinessCombinationConsiderationTransferred1
|
539000000 | USD |
| CY2016 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
1262000000 | USD |
| CY2017 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
985000000 | USD |
| CY2018 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
1103000000 | USD |
| CY2017Q4 | us-gaap |
Capital Lease Obligations
CapitalLeaseObligations
|
204000000 | USD |
| CY2018Q4 | us-gaap |
Capital Lease Obligations
CapitalLeaseObligations
|
197000000 | USD |
| CY2017Q4 | us-gaap |
Capital Lease Obligations Current
CapitalLeaseObligationsCurrent
|
31000000 | USD |
| CY2018Q4 | us-gaap |
Capital Lease Obligations Current
CapitalLeaseObligationsCurrent
|
24000000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Balance Sheet Assets By Major Class Net
CapitalLeasesBalanceSheetAssetsByMajorClassNet
|
201000000 | USD |
| CY2018Q4 | us-gaap |
Capital Leases Balance Sheet Assets By Major Class Net
CapitalLeasesBalanceSheetAssetsByMajorClassNet
|
191000000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation
CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
|
72000000 | USD |
| CY2018Q4 | us-gaap |
Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation
CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
|
75000000 | USD |
| CY2017Q4 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
70314000000 | USD |
| CY2018Q4 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
70066000000 | USD |
| CY2017Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
2130000000 | USD |
| CY2018Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
1396000000 | USD |
| CY2015Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
1420000000 | USD |
| CY2016Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
1992000000 | USD |
| CY2017Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
2147000000 | USD |
| CY2018Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
1519000000 | USD |
| CY2016 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
|
572000000 | USD |
| CY2017 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
|
155000000 | USD |
| CY2018 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
|
-628000000 | USD |
| CY2017Q4 | us-gaap |
Collateral Already Posted Aggregate Fair Value
CollateralAlreadyPostedAggregateFairValue
|
193000000 | USD |
| CY2018Q4 | us-gaap |
Collateral Already Posted Aggregate Fair Value
CollateralAlreadyPostedAggregateFairValue
|
277000000 | USD |
| CY2017Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2018Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
USD | |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
2.2225 | |
| CY2017Q1 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.56 | |
| CY2017Q2 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.58 | |
| CY2017Q3 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.58 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.07 | |
| CY2017Q4 | us-gaap |
Deferred Credits And Other Liabilities
DeferredCreditsAndOtherLiabilities
|
27097000000 | USD |
| CY2018Q1 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.58 | |
| CY2018Q2 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.60 | |
| CY2018Q3 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.60 | |
| CY2018Q4 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.60 | |
| CY2018 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
2.3800 | |
| CY2017Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
5 | |
| CY2018Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
5 | |
| CY2017Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
1500000000 | shares |
| CY2018Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
1500000000 | shares |
| CY2017Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
1000000000 | shares |
| CY2018Q4 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
1000000000 | shares |
| CY2017Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
5038000000 | USD |
| CY2018Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
5164000000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
2398000000 | USD |
| CY2017 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
833000000 | USD |
| CY2018 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
2252000000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
|
36000000 | USD |
| CY2017 | us-gaap |
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
|
46000000 | USD |
| CY2018 | us-gaap |
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
|
58000000 | USD |
| CY2017Q4 | us-gaap |
Construction In Progress Gross
ConstructionInProgressGross
|
6904000000 | USD |
| CY2018Q4 | us-gaap |
Construction In Progress Gross
ConstructionInProgressGross
|
7254000000 | USD |
| CY2018Q4 | us-gaap |
Contract With Customer Asset Net
ContractWithCustomerAssetNet
|
102000000 | USD |
| CY2018Q4 | us-gaap |
Contract With Customer Liability
ContractWithCustomerLiability
|
32000000 | USD |
| CY2018Q1 | us-gaap |
Conversion Of Stock Shares Converted1
ConversionOfStockSharesConverted1
|
1900000 | shares |
| CY2016 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
15410000000 | USD |
| CY2017 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
20698000000 | USD |
| CY2018 | us-gaap |
Costs And Expenses
CostsAndExpenses
|
19304000000 | USD |
| CY2018Q1 | us-gaap |
Cumulative Effect Of New Accounting Principle In Period Of Adoption
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
|
-40000000 | USD |
| CY2016 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
1184000000 | USD |
| CY2017 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
-62000000 | USD |
| CY2018 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
167000000 | USD |
| CY2016 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
-108000000 | USD |
| CY2017 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
37000000 | USD |
| CY2018 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
188000000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
48151000000 | USD |
| CY2018Q4 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
45023000000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Fair Value
DebtInstrumentFairValue
|
51348000000 | USD |
| CY2018Q4 | us-gaap |
Debt Instrument Fair Value
DebtInstrumentFairValue
|
44824000000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Unamortized Discount
DebtInstrumentUnamortizedDiscount
|
206000000 | USD |
| CY2018Q4 | us-gaap |
Debt Instrument Unamortized Discount
DebtInstrumentUnamortizedDiscount
|
194000000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Unamortized Premium
DebtInstrumentUnamortizedPremium
|
44000000 | USD |
| CY2018Q4 | us-gaap |
Debt Instrument Unamortized Premium
DebtInstrumentUnamortizedPremium
|
36000000 | USD |
| CY2017Q4 | us-gaap |
Decommissioning Fund Investments
DecommissioningFundInvestments
|
1832000000 | USD |
| CY2018Q4 | us-gaap |
Decommissioning Fund Investments
DecommissioningFundInvestments
|
1721000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Credits And Other Liabilities
DeferredCreditsAndOtherLiabilities
|
32562000000 | USD |
| CY2016 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
-342000000 | USD |
| CY2017 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
-6000000 | USD |
| CY2018 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
231000000 | USD |
| CY2016 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
-127000000 | USD |
| CY2017 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
166000000 | USD |
| CY2018 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
94000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
14757000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
15207000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
|
6842000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
|
6558000000 | USD |
| CY2016 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
217000000 | USD |
| CY2017 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
173000000 | USD |
| CY2018 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
-137000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
8205000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
9048000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
8021000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
8925000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards State And Local
DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
|
312000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
184000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
123000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
6736000000 | USD |
| CY2018Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
6282000000 | USD |
| CY2018Q4 | us-gaap |
Defined Benefit Plan Plan Assets Target Allocation Percentage
DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
|
1 | |
| CY2018Q4 | us-gaap |
Defined Benefit Plan Weighted Average Asset Allocations
DefinedBenefitPlanWeightedAverageAssetAllocations
|
1 | |
| CY2016 | us-gaap |
Depreciation Amortization And Accretion Net
DepreciationAmortizationAndAccretionNet
|
2923000000 | USD |
| CY2017 | us-gaap |
Depreciation Amortization And Accretion Net
DepreciationAmortizationAndAccretionNet
|
3457000000 | USD |
| CY2018 | us-gaap |
Depreciation Amortization And Accretion Net
DepreciationAmortizationAndAccretionNet
|
3549000000 | USD |
| CY2017Q4 | us-gaap |
Derivative Assets Current
DerivativeAssetsCurrent
|
137000000 | USD |
| CY2018Q4 | us-gaap |
Derivative Assets Current
DerivativeAssetsCurrent
|
222000000 | USD |
| CY2016 | us-gaap |
Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
|
-220000000 | USD |
| CY2017 | us-gaap |
Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
|
91000000 | USD |
| CY2018 | us-gaap |
Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
|
-62000000 | USD |
| CY2017Q4 | us-gaap |
Disposal Group Including Discontinued Operation Assets Noncurrent
DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
|
0 | USD |
| CY2018Q4 | us-gaap |
Disposal Group Including Discontinued Operation Assets Noncurrent
DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
|
5350000000 | USD |
| CY2018Q4 | us-gaap |
Disposal Group Including Discontinued Operation Cash And Cash Equivalents
DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
|
9000000 | USD |
| CY2016 | us-gaap |
Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
|
1000000 | USD |
| CY2017 | us-gaap |
Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
|
-40000000 | USD |
| CY2018 | us-gaap |
Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
|
-291000000 | USD |
| CY2016 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
2104000000 | USD |
| CY2017 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
2300000000 | USD |
| CY2018 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
2425000000 | USD |
| CY2016 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.57 | |
| CY2017Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.66 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-1.38 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.49 | |
| CY2017 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.84 | |
| CY2018Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.93 | |
| CY2018Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.15 | |
| CY2018Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.14 | |
| CY2018Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.27 | |
| CY2018 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.18 | |
| CY2016 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.55 | |
| CY2017Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.66 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-1.37 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.06 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.49 | |
| CY2017 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.84 | |
| CY2018Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.92 | |
| CY2018Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.15 | |
| CY2018Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.13 | |
| CY2018Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.27 | |
| CY2018 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.17 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.273 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.133 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.163 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.35 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.35 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.21 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
-0.256 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
-0.014 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.012 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.040 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.010 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Disposition Of Business
EffectiveIncomeTaxRateReconciliationDispositionOfBusiness
|
0.086 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense
|
0.003 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense
|
0.014 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense
|
0.004 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.009 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.031 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
0.008 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.001 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
-0.011 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
-0.008 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Prior Year Income Taxes
EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes
|
-0.001 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Prior Year Income Taxes
EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes
|
-0.003 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Prior Year Income Taxes
EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes
|
-0.040 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.020 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.125 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.018 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
|
-0.157 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
|
0.050 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
|
0.017 | |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation Tax Credits Investment
EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
|
0.006 | |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options
EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
|
25000000 | USD |
| CY2018 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options
EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
|
2000000 | USD |
| CY2017Q4 | us-gaap |
Energy Marketing Contract Liabilities Current
EnergyMarketingContractLiabilitiesCurrent
|
546000000 | USD |
| CY2018Q4 | us-gaap |
Energy Marketing Contract Liabilities Current
EnergyMarketingContractLiabilitiesCurrent
|
856000000 | USD |
| CY2017Q4 | us-gaap |
Energy Marketing Contracts Assets Current
EnergyMarketingContractsAssetsCurrent
|
607000000 | USD |
| CY2018Q4 | us-gaap |
Energy Marketing Contracts Assets Current
EnergyMarketingContractsAssetsCurrent
|
801000000 | USD |
| CY2017Q4 | us-gaap |
Energy Related Inventory Natural Gas In Storage
EnergyRelatedInventoryNaturalGasInStorage
|
595000000 | USD |
| CY2018Q4 | us-gaap |
Energy Related Inventory Natural Gas In Storage
EnergyRelatedInventoryNaturalGasInStorage
|
524000000 | USD |
| CY2017Q4 | us-gaap |
Energy Related Inventory Other Fossil Fuel
EnergyRelatedInventoryOtherFossilFuel
|
594000000 | USD |
| CY2018Q4 | us-gaap |
Energy Related Inventory Other Fossil Fuel
EnergyRelatedInventoryOtherFossilFuel
|
405000000 | USD |
| CY2017Q4 | us-gaap |
Equity Method Investments
EquityMethodInvestments
|
1513000000 | USD |
| CY2018Q4 | us-gaap |
Equity Method Investments
EquityMethodInvestments
|
1580000000 | USD |
| CY2016 | us-gaap |
Federal Income Tax Expense Benefit Continuing Operations
FederalIncomeTaxExpenseBenefitContinuingOperations
|
842000000 | USD |
| CY2017 | us-gaap |
Federal Income Tax Expense Benefit Continuing Operations
FederalIncomeTaxExpenseBenefitContinuingOperations
|
-68000000 | USD |
| CY2018 | us-gaap |
Federal Income Tax Expense Benefit Continuing Operations
FederalIncomeTaxExpenseBenefitContinuingOperations
|
398000000 | USD |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
186000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
|
235000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
|
61000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
|
38000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
|
39000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
|
43000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
|
50000000 | USD |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
|
984000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
|
773000000 | USD |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
798000000 | USD |
| CY2018Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
538000000 | USD |
| CY2016 | us-gaap |
Gain Loss On Disposition Of Assets1
GainLossOnDispositionOfAssets1
|
2000000 | USD |
| CY2017 | us-gaap |
Gain Loss On Disposition Of Assets1
GainLossOnDispositionOfAssets1
|
42000000 | USD |
| CY2018 | us-gaap |
Gain Loss On Disposition Of Assets1
GainLossOnDispositionOfAssets1
|
301000000 | USD |
| CY2016Q4 | us-gaap |
Goodwill
Goodwill
|
6251000000 | USD |
| CY2017Q4 | us-gaap |
Goodwill
Goodwill
|
6268000000 | USD |
| CY2018Q4 | us-gaap |
Goodwill
Goodwill
|
5315000000 | USD |
| CY2018Q4 | us-gaap |
Goodwill Impairment Loss
GoodwillImpairmentLoss
|
0 | USD |
| CY2018 | us-gaap |
Goodwill Impairment Loss
GoodwillImpairmentLoss
|
42000000 | USD |
| CY2018 | us-gaap |
Goodwill Written Off Related To Sale Of Business Unit
GoodwillWrittenOffRelatedToSaleOfBusinessUnit
|
910000000 | USD |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
3480000000 | USD |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
1068000000 | USD |
| CY2018 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
2749000000 | USD |
| us-gaap |
Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
|
15000000 | USD | |
| CY2016 | us-gaap |
Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
|
59000000 | USD |
| CY2017 | us-gaap |
Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
|
106000000 | USD |
| CY2018 | us-gaap |
Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
|
148000000 | USD |
| CY2016 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
951000000 | USD |
| CY2017 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
142000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
-9000000 | USD |
| CY2017 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
176000000 | USD |
| CY2018 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
192000000 | USD |
| CY2017 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
-410000000 | USD |
| CY2018 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
172000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
301000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-280000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
291000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Deposits
IncreaseDecreaseInDeposits
|
-102000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Deposits
IncreaseDecreaseInDeposits
|
-4000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Deposits
IncreaseDecreaseInDeposits
|
17000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Fossil Fuel Inventories
IncreaseDecreaseInFossilFuelInventories
|
-178000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Fossil Fuel Inventories
IncreaseDecreaseInFossilFuelInventories
|
-36000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Fossil Fuel Inventories
IncreaseDecreaseInFossilFuelInventories
|
-123000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
206000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
143000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
127000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
250000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
-45000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
63000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
544000000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
202000000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
426000000 | USD |
| CY2016 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
7000000 | shares |
| CY2017 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
8000000 | shares |
| CY2018 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
5000000 | shares |
| CY2017Q4 | us-gaap |
Intangible Assets Gross Excluding Goodwill
IntangibleAssetsGrossExcludingGoodwill
|
1059000000 | USD |
| CY2018Q4 | us-gaap |
Intangible Assets Gross Excluding Goodwill
IntangibleAssetsGrossExcludingGoodwill
|
848000000 | USD |
| CY2017Q4 | us-gaap |
Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
|
873000000 | USD |
| CY2018Q4 | us-gaap |
Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
|
613000000 | USD |
| CY2016 | us-gaap |
Interest And Debt Expense
InterestAndDebtExpense
|
1317000000 | USD |
| CY2017 | us-gaap |
Interest And Debt Expense
InterestAndDebtExpense
|
1694000000 | USD |
| CY2018 | us-gaap |
Interest And Debt Expense
InterestAndDebtExpense
|
1842000000 | USD |
| CY2016 | us-gaap |
Interest Paid Capitalized
InterestPaidCapitalized
|
128000000 | USD |
| CY2017 | us-gaap |
Interest Paid Capitalized
InterestPaidCapitalized
|
89000000 | USD |
| CY2018 | us-gaap |
Interest Paid Capitalized
InterestPaidCapitalized
|
72000000 | USD |
| CY2016 | us-gaap |
Interest Paid Net
InterestPaidNet
|
1066000000 | USD |
| CY2017 | us-gaap |
Interest Paid Net
InterestPaidNet
|
1676000000 | USD |
| CY2018 | us-gaap |
Interest Paid Net
InterestPaidNet
|
1794000000 | USD |
| CY2017Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
488000000 | USD |
| CY2018Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
472000000 | USD |
| CY2018Q4 | us-gaap |
Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net
InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
|
-19000000 | USD |
| CY2016 | us-gaap |
Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
|
20000000 | USD |
| CY2017 | us-gaap |
Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
|
26000000 | USD |
| CY2018 | us-gaap |
Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
|
38000000 | USD |
| CY2017Q4 | us-gaap |
Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust Current
JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustCurrent
|
206000000 | USD |
| CY2018Q4 | us-gaap |
Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust Current
JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustCurrent
|
206000000 | USD |
| CY2016 | us-gaap |
Lease And Rental Expense
LeaseAndRentalExpense
|
169000000 | USD |
| CY2018Q4 | us-gaap |
Leveraged Leases Balance Sheet Investment In Leveraged Leases
LeveragedLeasesBalanceSheetInvestmentInLeveragedLeases
|
86000000 | USD |
| CY2017Q4 | us-gaap |
Leveraged Leases Balance Sheet Investment In Leveraged Leases Net
LeveragedLeasesBalanceSheetInvestmentInLeveragedLeasesNet
|
775000000 | USD |
| CY2018Q4 | us-gaap |
Leveraged Leases Balance Sheet Investment In Leveraged Leases Net
LeveragedLeasesBalanceSheetInvestmentInLeveragedLeasesNet
|
798000000 | USD |
| CY2017Q4 | us-gaap |
Liabilities
Liabilities
|
85153000000 | USD |
| CY2018Q4 | us-gaap |
Liabilities
Liabilities
|
87584000000 | USD |
| CY2017Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
111005000000 | USD |
| CY2018Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
116914000000 | USD |
| CY2017Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
13594000000 | USD |
| CY2018Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
14286000000 | USD |
| CY2018Q4 | us-gaap |
Line Of Credit Facility Maximum Borrowing Capacity
LineOfCreditFacilityMaximumBorrowingCapacity
|
7863000000 | USD |
| CY2017Q4 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
500000000 | USD |
| CY2017 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
842000000 | USD |
| CY2018Q4 | us-gaap |
Line Of Credit Facility Remaining Borrowing Capacity
LineOfCreditFacilityRemainingBorrowingCapacity
|
7820000000 | USD |
| CY2017Q4 | us-gaap |
Loans Payable To Bank
LoansPayableToBank
|
1465000000 | USD |
| CY2018Q4 | us-gaap |
Loans Payable To Bank
LoansPayableToBank
|
145000000 | USD |
| CY2017Q4 | us-gaap |
Loans Payable To Bank Current
LoansPayableToBankCurrent
|
1420000000 | USD |
| CY2017Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations
LongTermDebtAndCapitalLeaseObligations
|
44462000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations
LongTermDebtAndCapitalLeaseObligations
|
40736000000 | USD |
| CY2017Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations Current
LongTermDebtAndCapitalLeaseObligationsCurrent
|
3892000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations Current
LongTermDebtAndCapitalLeaseObligationsCurrent
|
3198000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
|
3156000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
|
2388000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Four
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
|
1974000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
|
3186000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
|
4041000000 | USD |
| CY2017Q4 | us-gaap |
Long Term Investments
LongTermInvestments
|
11510000000 | USD |
| CY2018Q4 | us-gaap |
Long Term Investments
LongTermInvestments
|
10296000000 | USD |
| CY2017Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
3297000000 | USD |
| CY2018Q4 | us-gaap |
Longterm Pollution Control Bond Current And Noncurrent
LongtermPollutionControlBondCurrentAndNoncurrent
|
2585000000 | USD |
| CY2018Q4 | us-gaap |
Loss Contingency Number Of Plaintiffs
LossContingencyNumberOfPlaintiffs
|
10 | plaintiff |
| CY2016 | us-gaap |
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
|
57000000 | USD |
| CY2017 | us-gaap |
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
|
122000000 | USD |
| CY2018 | us-gaap |
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
|
164000000 | USD |
| CY2016 | us-gaap |
Minority Interest Decrease From Redemptions
MinorityInterestDecreaseFromRedemptions
|
129000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
15725000000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
951000000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
-1813000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-20047000000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-7190000000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-5760000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
4894000000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
6394000000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
6945000000 | USD |
| CY2017Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
658000000 | USD |
| CY2017Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-1381000000 | USD |
| CY2017Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
1069000000 | USD |
| CY2017Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
496000000 | USD |
| CY2018Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
938000000 | USD |
| CY2018Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-154000000 | USD |
| CY2018Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
1164000000 | USD |
| CY2018Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
278000000 | USD |
| CY2016 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
36000000 | USD |
| CY2017 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
46000000 | USD |
| CY2018 | us-gaap |
Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
|
58000000 | USD |
| CY2016 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
2448000000 | USD |
| CY2017Q1 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
665000000 | USD |
| CY2017Q2 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
-1348000000 | USD |
| CY2017Q3 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
1109000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
|
-72000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax
|
-24000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-50000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-9000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
26000000 | USD |
| CY2018Q1 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
936000000 | USD |
| CY2018Q2 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
-127000000 | USD |
| CY2018Q3 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
1222000000 | USD |
| CY2018Q4 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
269000000 | USD |
| CY2018 | us-gaap |
Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
|
2226000000 | USD |
| CY2017Q4 | us-gaap |
Net Regulatory Assets
NetRegulatoryAssets
|
-1894000000 | USD |
| CY2018Q4 | us-gaap |
Net Regulatory Assets
NetRegulatoryAssets
|
720000000 | USD |
| CY2016 | us-gaap |
Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable
NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable
|
-32000000 | USD |
| CY2017 | us-gaap |
Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable
NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable
|
-44000000 | USD |
| CY2018 | us-gaap |
Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable
NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable
|
-58000000 | USD |
| CY2018 | us-gaap |
Noncontrolling Interest Increase From Sale Of Parent Equity Interest
NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
|
1273000000 | USD |
| CY2016 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-1006000000 | USD |
| CY2017 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-1265000000 | USD |
| CY2018 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-1442000000 | USD |
| CY2016 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
4486000000 | USD |
| CY2017Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
1252000000 | USD |
| CY2017Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
-1649000000 | USD |
| CY2017Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
1991000000 | USD |
| CY2017Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
739000000 | USD |
| CY2017 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
2333000000 | USD |
| CY2018Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
1376000000 | USD |
| CY2018Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
63000000 | USD |
| CY2018Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
2174000000 | USD |
| CY2018Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
578000000 | USD |
| CY2018 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
4191000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due
OperatingLeasesFutureMinimumPaymentsDue
|
1617000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
|
156000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
|
79000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
|
98000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
|
110000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
|
134000000 | USD |
| CY2018Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Thereafter
OperatingLeasesFutureMinimumPaymentsDueThereafter
|
1040000000 | USD |
| CY2017Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
62000000 | USD |
| CY2018Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
162000000 | USD |
| CY2017Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
1577000000 | USD |
| CY2018Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
1463000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
13000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
17000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
|
-5000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
|
10000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
|
6000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax
OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax
|
-2000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
|
-47000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax
|
-16000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
-50000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
26000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
|
-69000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
|
60000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
|
-43000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
|
37000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
|
-4000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
|
23000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
|
-6000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
|
-3000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
|
6000000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
|
-5000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
|
-136000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
|
57000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
-84000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
34000000 | USD |
| CY2018 | us-gaap |
Other Income
OtherIncome
|
322000000 | USD |
| CY2017Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
1438000000 | USD |
| CY2018Q4 | us-gaap |
Other Inventory Supplies
OtherInventorySupplies
|
1465000000 | USD |
| CY2017Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
874000000 | USD |
| CY2018Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
852000000 | USD |
| CY2017Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
691000000 | USD |
| CY2018Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
465000000 | USD |
| CY2017Q4 | us-gaap |
Other Long Term Debt
OtherLongTermDebt
|
10987000000 | USD |
| CY2018Q4 | us-gaap |
Other Long Term Debt
OtherLongTermDebt
|
10684000000 | USD |
| CY2017Q4 | us-gaap |
Other Long Term Investments
OtherLongTermInvestments
|
249000000 | USD |
| CY2018Q4 | us-gaap |
Other Long Term Investments
OtherLongTermInvestments
|
269000000 | USD |
| CY2016 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
219000000 | USD |
| CY2017 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
112000000 | USD |
| CY2018 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
22000000 | USD |
| CY2016 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
50000000 | USD |
| CY2017 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
163000000 | USD |
| CY2018 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
114000000 | USD |
| CY2016 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
122000000 | USD |
| CY2017 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
53000000 | USD |
| CY2018 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
6000000 | USD |
| CY2016 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
245000000 | USD |
| CY2017 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
313000000 | USD |
| CY2018 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
388000000 | USD |
| CY2016 | us-gaap |
Payments For Repurchase Of Preferred Stock And Preference Stock
PaymentsForRepurchaseOfPreferredStockAndPreferenceStock
|
0 | USD |
| CY2017 | us-gaap |
Payments For Repurchase Of Preferred Stock And Preference Stock
PaymentsForRepurchaseOfPreferredStockAndPreferenceStock
|
658000000 | USD |
| CY2018 | us-gaap |
Payments For Repurchase Of Preferred Stock And Preference Stock
PaymentsForRepurchaseOfPreferredStockAndPreferenceStock
|
33000000 | USD |
| CY2016 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
2104000000 | USD |
| CY2017 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
2300000000 | USD |
| CY2018 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
2425000000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
|
10680000000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
|
1054000000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Equity Method Investments
PaymentsToAcquireEquityMethodInvestments
|
152000000 | USD |
| CY2018 | us-gaap |
Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
|
65000000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Equity Method Investments
PaymentsToAcquireEquityMethodInvestments
|
1444000000 | USD |
| CY2017 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
-401000000 | USD |
| CY2018 | us-gaap |
Payments To Acquire Equity Method Investments
PaymentsToAcquireEquityMethodInvestments
|
114000000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Productive Assets
PaymentsToAcquireProductiveAssets
|
7624000000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Productive Assets
PaymentsToAcquireProductiveAssets
|
5984000000 | USD |
| CY2018 | us-gaap |
Payments To Acquire Productive Assets
PaymentsToAcquireProductiveAssets
|
8205000000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
7310000000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
7423000000 | USD |
| CY2018 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
8001000000 | USD |
| CY2016 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
1160000000 | USD |
| CY2017 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
811000000 | USD |
| CY2018 | us-gaap |
Payments To Invest In Decommissioning Fund
PaymentsToInvestInDecommissioningFund
|
1117000000 | USD |
| CY2016 | us-gaap |
Payments To Minority Shareholders
PaymentsToMinorityShareholders
|
72000000 | USD |
| CY2017 | us-gaap |
Payments To Minority Shareholders
PaymentsToMinorityShareholders
|
119000000 | USD |
| CY2018 | us-gaap |
Payments To Minority Shareholders
PaymentsToMinorityShareholders
|
153000000 | USD |
| CY2016 | us-gaap |
Pension And Other Postretirement Benefit Contributions
PensionAndOtherPostretirementBenefitContributions
|
1029000000 | USD |
| CY2017 | us-gaap |
Pension And Other Postretirement Benefit Contributions
PensionAndOtherPostretirementBenefitContributions
|
2000000 | USD |
| CY2018 | us-gaap |
Pension And Other Postretirement Benefit Contributions
PensionAndOtherPostretirementBenefitContributions
|
4000000 | USD |
| CY2017Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
2256000000 | USD |
| CY2018Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
2147000000 | USD |
| CY2016 | us-gaap |
Preferred Stock Dividends Income Statement Impact
PreferredStockDividendsIncomeStatementImpact
|
45000000 | USD |
| CY2017 | us-gaap |
Preferred Stock Dividends Income Statement Impact
PreferredStockDividendsIncomeStatementImpact
|
38000000 | USD |
| CY2018 | us-gaap |
Preferred Stock Dividends Income Statement Impact
PreferredStockDividendsIncomeStatementImpact
|
16000000 | USD |
| CY2017Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
452000000 | USD |
| CY2018Q4 | us-gaap |
Prepaid Expense Current
PrepaidExpenseCurrent
|
432000000 | USD |
| CY2016 | us-gaap |
Proceeds From Decommissioning Fund
ProceedsFromDecommissioningFund
|
1154000000 | USD |
| CY2017 | us-gaap |
Proceeds From Decommissioning Fund
ProceedsFromDecommissioningFund
|
805000000 | USD |
| CY2018 | us-gaap |
Proceeds From Decommissioning Fund
ProceedsFromDecommissioningFund
|
1111000000 | USD |
| CY2016 | us-gaap |
Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
|
15000000 | USD |
| CY2017 | us-gaap |
Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
|
97000000 | USD |
| CY2018 | us-gaap |
Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
|
2956000000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
3758000000 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
793000000 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
1090000000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Long Term Debt And Capital Securities Net
ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet
|
16368000000 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Long Term Debt And Capital Securities Net
ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet
|
5858000000 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Of Long Term Debt And Capital Securities Net
ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet
|
2478000000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Preferred Stock And Preference Stock
ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
|
0 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Preferred Stock And Preference Stock
ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
|
250000000 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Of Preferred Stock And Preference Stock
ProceedsFromIssuanceOfPreferredStockAndPreferenceStock
|
0 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options
ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
|
442000000 | USD |
| CY2016 | us-gaap |
Proceeds From Minority Shareholders
ProceedsFromMinorityShareholders
|
682000000 | USD |
| CY2017 | us-gaap |
Proceeds From Minority Shareholders
ProceedsFromMinorityShareholders
|
80000000 | USD |
| CY2018 | us-gaap |
Proceeds From Minority Shareholders
ProceedsFromMinorityShareholders
|
2551000000 | USD |
| CY2016 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-512000000 | USD |
| CY2017 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-222000000 | USD |
| CY2018 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-264000000 | USD |
| CY2016 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
1228000000 | USD |
| CY2018 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
-774000000 | USD |
| CY2016 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
0 | USD |
| CY2017 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
1259000000 | USD |
| CY2018 | us-gaap |
Proceeds From Short Term Debt
ProceedsFromShortTermDebt
|
3150000000 | USD |
| CY2016 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
448000000 | USD |
| CY2017 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
239000000 | USD |
| CY2018 | us-gaap |
Proceeds From Stock Options Exercised
ProceedsFromStockOptionsExercised
|
41000000 | USD |
| CY2016 | us-gaap |
Profit Loss
ProfitLoss
|
2529000000 | USD |
| CY2017 | us-gaap |
Profit Loss
ProfitLoss
|
926000000 | USD |
| CY2018 | us-gaap |
Profit Loss
ProfitLoss
|
2300000000 | USD |
| CY2017Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
103542000000 | USD |
| CY2018Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
103706000000 | USD |
| CY2017Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
79872000000 | USD |
| CY2018Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
80797000000 | USD |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
202000000 | USD |
| CY2017 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
160000000 | USD |
| CY2018 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity
|
138000000 | USD |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
327000000 | USD |
| CY2017 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
249000000 | USD |
| CY2018 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
210000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
19239000000 | USD |
| CY2018Q4 | us-gaap |
Public Utilities Property Plant And Equipment Distribution
PublicUtilitiesPropertyPlantAndEquipmentDistribution
|
18746000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
51279000000 | USD |
| CY2018Q4 | us-gaap |
Public Utilities Property Plant And Equipment Generation Or Processing
PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing
|
52324000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Other Property Plant And Equipment
PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
|
1227000000 | USD |
| CY2018Q4 | us-gaap |
Public Utilities Property Plant And Equipment Other Property Plant And Equipment
PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
|
1669000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
103542000000 | USD |
| CY2018Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
103706000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
11562000000 | USD |
| CY2018Q4 | us-gaap |
Public Utilities Property Plant And Equipment Transmission
PublicUtilitiesPropertyPlantAndEquipmentTransmission
|
11344000000 | USD |
| CY2016 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
3145000000 | USD |
| CY2017 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
2930000000 | USD |
| CY2018 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
5533000000 | USD |
| CY2016 | us-gaap |
Repayments Of Other Long Term Debt
RepaymentsOfOtherLongTermDebt
|
0 | USD |
| CY2017 | us-gaap |
Repayments Of Other Long Term Debt
RepaymentsOfOtherLongTermDebt
|
0 | USD |
| CY2018 | us-gaap |
Repayments Of Other Long Term Debt
RepaymentsOfOtherLongTermDebt
|
100000000 | USD |
| CY2016 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
478000000 | USD |
| CY2017 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
659000000 | USD |
| CY2018 | us-gaap |
Repayments Of Short Term Debt
RepaymentsOfShortTermDebt
|
1900000000 | USD |
| CY2018Q4 | us-gaap |
Restricted Cash And Cash Equivalents At Carrying Value
RestrictedCashAndCashEquivalentsAtCarryingValue
|
0 | USD |
| CY2017Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
8885000000 | USD |
| CY2018Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
8706000000 | USD |
| CY2016 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
19896000000 | USD |
| CY2017 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
23031000000 | USD |
| CY2018 | us-gaap |
Revenue From Contract With Customer Including Assessed Tax
RevenueFromContractWithCustomerIncludingAssessedTax
|
23495000000 | USD |
| CY2016 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
5382000000 | USD |
| CY2017 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
5739000000 | USD |
| CY2018 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
1020000000 | shares |
| CY2017 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
793000000 | USD |
| CY2018 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
1090000000 | USD |
| CY2016 | us-gaap |
Stock Option Plan Expense
StockOptionPlanExpense
|
121000000 | USD |
| CY2017 | us-gaap |
Stock Option Plan Expense
StockOptionPlanExpense
|
109000000 | USD |
| CY2018 | us-gaap |
Stock Option Plan Expense
StockOptionPlanExpense
|
125000000 | USD |
| CY2017 | us-gaap |
Stock Redeemed Or Called During Period Value
StockRedeemedOrCalledDuringPeriodValue
|
609000000 | USD |
| CY2017Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
24167000000 | USD |
| CY2018Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
24723000000 | USD |
| CY2015Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
21982000000 | USD |
| CY2016Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
26612000000 | USD |
| CY2017Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
25528000000 | USD |
| CY2018Q4 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
29039000000 | USD |
| CY2016 | us-gaap |
Stockholders Equity Other
StockholdersEquityOther
|
6000000 | USD |
| CY2017 | us-gaap |
Stockholders Equity Other
StockholdersEquityOther
|
21000000 | USD |
| CY2018 | us-gaap |
Stockholders Equity Other
StockholdersEquityOther
|
29000000 | USD |
| CY2016 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
1113000000 | USD |
| CY2017 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
1250000000 | USD |
| CY2018 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
1315000000 | USD |
| CY2017Q4 | us-gaap |
Temporary Equity Carrying Amount Attributable To Parent
TemporaryEquityCarryingAmountAttributableToParent
|
324000000 | USD |
| CY2018Q4 | us-gaap |
Temporary Equity Carrying Amount Attributable To Parent
TemporaryEquityCarryingAmountAttributableToParent
|
291000000 | USD |
| CY2017 | us-gaap |
Temporary Equity Other Changes
TemporaryEquityOtherChanges
|
6000000 | USD |
| CY2017Q4 | us-gaap |
Treasury Stock Shares
TreasuryStockShares
|
900000 | shares |
| CY2018Q4 | us-gaap |
Treasury Stock Shares
TreasuryStockShares
|
1000000 | shares |
| CY2017Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
36000000 | USD |
| CY2018Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
38000000 | USD |
| CY2017Q4 | us-gaap |
Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
|
226000000 | USD |
| CY2018Q4 | us-gaap |
Unamortized Debt Issuance Expense
UnamortizedDebtIssuanceExpense
|
208000000 | USD |
| CY2017Q4 | us-gaap |
Unamortized Loss Reacquired Debt Noncurrent
UnamortizedLossReacquiredDebtNoncurrent
|
206000000 | USD |
| CY2018Q4 | us-gaap |
Unamortized Loss Reacquired Debt Noncurrent
UnamortizedLossReacquiredDebtNoncurrent
|
323000000 | USD |
| CY2015Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
433000000 | USD |
| CY2016Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
484000000 | USD |
| CY2017Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
18000000 | USD |
| CY2018Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2018Q4 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
15000000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
196000000 | USD |
| CY2018 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
18000000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
|
290000000 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
|
45000000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
|
10000000 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
|
21000000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
|
10000000 | USD |
| CY2016Q4 | us-gaap |
Unrecognized Tax Benefits That Would Impact Effective Tax Rate
UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
|
20000000 | USD |
| CY2017Q4 | us-gaap |
Unrecognized Tax Benefits That Would Impact Effective Tax Rate
UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
|
18000000 | USD |
| CY2018 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
5889000000 | USD |
| CY2016 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
958000000 | shares |
| CY2017 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
1008000000 | shares |
| CY2018 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
1025000000 | shares |
| CY2016 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
951000000 | shares |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
487000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
341000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
315000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
315000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
306000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation
RevenueRemainingPerformanceObligation
|
2103000000 | USD |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
P1Y | |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
P1Y | |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
P1Y | |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
P1Y | |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
P1Y | |
| CY2018Q4 | us-gaap |
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1
RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
|
||
| CY2017Q1 | us-gaap |
Revenues
Revenues
|
5771000000 | USD |
| CY2017Q2 | us-gaap |
Revenues
Revenues
|
5430000000 | USD |
| CY2017Q3 | us-gaap |
Revenues
Revenues
|
6201000000 | USD |
| CY2017Q4 | us-gaap |
Revenues
Revenues
|
5629000000 | USD |
| CY2018Q1 | us-gaap |
Revenues
Revenues
|
6372000000 | USD |
| CY2018Q2 | us-gaap |
Revenues
Revenues
|
5627000000 | USD |
| CY2018Q3 | us-gaap |
Revenues
Revenues
|
6159000000 | USD |
| CY2018Q4 | us-gaap |
Revenues
Revenues
|
5337000000 | USD |
| CY2017Q4 | us-gaap |
Senior Notes
SeniorNotes
|
35148000000 | USD |
| CY2018Q4 | us-gaap |
Senior Notes
SeniorNotes
|
32725000000 | USD |
| CY2017Q4 | us-gaap |
Senior Notes Current
SeniorNotesCurrent
|
2354000000 | USD |
| CY2018Q4 | us-gaap |
Senior Notes Current
SeniorNotesCurrent
|
2950000000 | USD |
| CY2016 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
120000000 | USD |
| CY2017 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
64000000 | USD |
| CY2018 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
|
9000000 | USD |
| CY2018Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
|
39000000 | USD |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
18600000 | shares |
| CY2018Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
|
17500000 | shares |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
41.68 | |
| CY2018Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
|
41.92 | |
| CY2018 | us-gaap |
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
|
37.82 | |
| CY2018Q4 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
|
39000000 | USD |
| CY2018 | us-gaap |
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
|
P0Y | |
| CY2017Q4 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
2439000000 | USD |
| CY2018Q4 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
2915000000 | USD |
| CY2017Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.019 | |
| CY2018Q4 | us-gaap |
Short Term Debt Weighted Average Interest Rate
ShortTermDebtWeightedAverageInterestRate
|
0.031 | |
| CY2016 | us-gaap |
State And Local Income Tax Expense Benefit Continuing Operations
StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
|
109000000 | USD |
| CY2017 | us-gaap |
State And Local Income Tax Expense Benefit Continuing Operations
StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
|
210000000 | USD |
| CY2018 | us-gaap |
State And Local Income Tax Expense Benefit Continuing Operations
StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
|
51000000 | USD |
| CY2018 | us-gaap |
Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
|
1100000 | shares |
| CY2016 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
3758000000 | USD |
| CY2018 | us-gaap |
Concentration Risk Credit Risk
ConcentrationRiskCreditRisk
|
<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Concentration of Credit Risk</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Southern Company Gas' wholesale gas services business has a concentration of credit risk for services it provides to its counterparties. This credit risk is generally concentrated in </font><font style="font-family:inherit;font-size:10pt;">20</font><font style="font-family:inherit;font-size:10pt;"> of its counterparties and is measured by 30-day receivable exposure plus forward exposure. Counterparty credit risk is evaluated using a S&P equivalent credit rating, which is determined by a process of converting the lower of the S&P or Moody's rating to an internal rating ranging from </font><font style="font-family:inherit;font-size:10pt;">9</font><font style="font-family:inherit;font-size:10pt;"> to </font><font style="font-family:inherit;font-size:10pt;">1</font><font style="font-family:inherit;font-size:10pt;">, with </font><font style="font-family:inherit;font-size:10pt;">9</font><font style="font-family:inherit;font-size:10pt;"> being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being equivalent to D/Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of its financial ratios. As of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2018</font><font style="font-family:inherit;font-size:10pt;">, the top </font><font style="font-family:inherit;font-size:10pt;">20</font><font style="font-family:inherit;font-size:10pt;"> counterparties represented </font><font style="font-family:inherit;font-size:10pt;">48%</font><font style="font-family:inherit;font-size:10pt;">, or </font><font style="font-family:inherit;font-size:10pt;">$298 million</font><font style="font-family:inherit;font-size:10pt;">, of the total counterparty exposure and had a weighted average S&P equivalent rating of A-.</font></div><div style="line-height:120%;padding-top:6px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of </font><font style="font-family:inherit;font-size:10pt;">15</font><font style="font-family:inherit;font-size:10pt;"> Marketers in Georgia (including SouthStar). The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> times a Marketer's highest month's estimated bill from Atlanta Gas Light.</font></div></div> | |
| CY2018 | us-gaap |
Property Plant And Equipment Preproduction Design And Development Costs
PropertyPlantAndEquipmentPreproductionDesignAndDevelopmentCosts
|
<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Development Costs</font></div><div style="line-height:120%;padding-top:6px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">For Southern Power, development costs are capitalized once a project is probable of completion, primarily based on a review of its economics and operational feasibility, as well as status of power off-take agreements and regulatory approvals, if applicable. Southern Power's capitalized development costs are included in CWIP on the balance sheets. All of Southern Power's development costs incurred prior to the determination that a project is probable of completion are expensed as incurred and included in other operations and maintenance expense in the statements of income. If it is determined that a project is no longer probable of completion, any of Southern Power's capitalized development costs are expensed and included in other operations and maintenance expense in the statements of income.</font></div></div> |
