2017 Q4 Form 10-K Financial Statement
#000111171118000008 Filed on February 20, 2018
Income Statement
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| Revenue | $1.368B | $917.0M | $990.7M |
| YoY Change | 5.5% | 6.47% | 10.37% |
| Cost Of Revenue | $456.0M | $233.6M | $276.8M |
| YoY Change | 3.5% | 7.06% | 17.84% |
| Gross Profit | $1.368B | $917.0M | $990.7M |
| YoY Change | 59.77% | 42.59% | 49.49% |
| Gross Profit Margin | 100.0% | 100.0% | 100.0% |
| Selling, General & Admin | |||
| YoY Change | |||
| % of Gross Profit | |||
| Research & Development | |||
| YoY Change | |||
| % of Gross Profit | |||
| Depreciation & Amortization | $141.8M | $143.0M | $142.2M |
| YoY Change | 0.5% | 4.92% | 3.87% |
| % of Gross Profit | 10.36% | 15.59% | 14.35% |
| Operating Expenses | $636.1M | $805.8M | $866.7M |
| YoY Change | 1.91% | 52.21% | 65.24% |
| Operating Profit | $270.6M | $111.2M | $124.0M |
| YoY Change | 20.32% | -2.2% | -10.27% |
| Interest Expense | -$92.40M | $87.90M | $87.70M |
| YoY Change | 5.0% | 3.41% | 1.98% |
| % of Operating Profit | -34.15% | 79.05% | 70.73% |
| Other Income/Expense, Net | -$13.20M | -$94.70M | -$195.0M |
| YoY Change | 1100.0% | 16.2% | 111.73% |
| Pretax Income | $165.0M | $16.50M | -$71.00M |
| YoY Change | 14.82% | -48.76% | -254.01% |
| Income Tax | $56.30M | $2.500M | -$26.60M |
| % Of Pretax Income | 34.12% | 15.15% | |
| Net Earnings | -$52.40M | $14.00M | -$44.40M |
| YoY Change | -159.01% | -48.53% | -253.63% |
| Net Earnings / Revenue | -3.83% | 1.53% | -4.48% |
| Basic Earnings Per Share | -$0.16 | $0.04 | -$0.14 |
| Diluted Earnings Per Share | -$0.16 | $0.04 | -$0.14 |
| COMMON SHARES | |||
| Basic Shares Outstanding | 336.8M shares | 331.1M shares | 325.1M shares |
| Diluted Shares Outstanding | 332.4M shares | 325.1M shares |
Balance Sheet
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $29.00M | $19.00M | $18.00M |
| YoY Change | 11.54% | 18.75% | 12.5% |
| Cash & Equivalents | $29.00M | $19.30M | $17.90M |
| Short-Term Investments | |||
| Other Short-Term Assets | $132.8M | $65.80M | $91.30M |
| YoY Change | 1.68% | 2.65% | 1.67% |
| Inventory | $471.0M | $512.0M | $393.0M |
| Prepaid Expenses | |||
| Receivables | $898.9M | $480.0M | $545.2M |
| Other Receivables | $46.00M | $43.00M | $35.00M |
| Total Short-Term Assets | $1.763B | $1.332B | $1.281B |
| YoY Change | 0.07% | -3.34% | 1.68% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $14.36B | $14.04B | $13.67B |
| YoY Change | 9.88% | 9.24% | 8.87% |
| Goodwill | $1.691B | $1.691B | $1.691B |
| YoY Change | 0.0% | 0.0% | 0.0% |
| Intangibles | $231.7M | ||
| YoY Change | -4.53% | ||
| Long-Term Investments | $210.0M | $213.0M | $201.0M |
| YoY Change | 5.0% | 2.9% | 2.03% |
| Other Assets | $3.629B | $3.682B | $3.672B |
| YoY Change | -0.89% | 1.48% | 1.85% |
| Total Long-Term Assets | $18.20B | $17.94B | $17.54B |
| YoY Change | 7.49% | 7.48% | 7.24% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $1.763B | $1.332B | $1.281B |
| Total Long-Term Assets | $18.20B | $17.94B | $17.54B |
| Total Assets | $19.96B | $19.27B | $18.82B |
| YoY Change | 6.79% | 6.65% | 6.84% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $625.6M | $447.4M | $451.1M |
| YoY Change | 15.98% | 27.03% | 21.52% |
| Accrued Expenses | $399.0M | $375.0M | $327.0M |
| YoY Change | 9.62% | 36.36% | 4.14% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $1.206B | $843.2M | $901.3M |
| YoY Change | -18.97% | -20.38% | -18.12% |
| Long-Term Debt Due | $284.0M | $290.0M | $561.0M |
| YoY Change | -21.76% | -50.26% | 79.81% |
| Total Short-Term Liabilities | $3.178B | $2.567B | $2.778B |
| YoY Change | -7.93% | -11.84% | 3.05% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $7.512B | $7.519B | $6.777B |
| YoY Change | 24.0% | 23.34% | 15.71% |
| Other Long-Term Liabilities | $194.4M | $187.8M | $188.9M |
| YoY Change | -3.04% | 2.74% | 1.02% |
| Total Long-Term Liabilities | $4.951B | $4.821B | $5.144B |
| YoY Change | -3.12% | -8.13% | -2.07% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $3.178B | $2.567B | $2.778B |
| Total Long-Term Liabilities | $4.951B | $4.821B | $5.144B |
| Total Liabilities | $8.129B | $7.388B | $7.923B |
| YoY Change | -5.06% | -9.46% | -0.34% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | -$1.073B | -$1.021B | -$975.6M |
| YoY Change | 10.38% | -3.8% | -8.6% |
| Common Stock | $5.533B | $5.522B | $5.229B |
| YoY Change | 7.28% | 7.45% | 2.09% |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | $95.90M | $94.60M | $94.60M |
| YoY Change | 8.12% | 8.24% | 8.49% |
| Treasury Stock Shares | |||
| Shareholders Equity | $4.320B | $4.363B | $4.123B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $19.96B | $19.27B | $18.82B |
| YoY Change | 6.79% | 6.65% | 6.84% |
Cashflow Statement
| Concept | 2017 Q4 | 2017 Q3 | 2017 Q2 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | -$52.40M | $14.00M | -$44.40M |
| YoY Change | -159.01% | -48.53% | -253.63% |
| Depreciation, Depletion And Amortization | $141.8M | $143.0M | $142.2M |
| YoY Change | 0.5% | 4.92% | 3.87% |
| Cash From Operating Activities | $212.6M | -$121.8M | $240.3M |
| YoY Change | -21.64% | -371.27% | 30.46% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | -$509.5M | -$507.5M | -$444.4M |
| YoY Change | 20.62% | 14.72% | 11.69% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $7.100M | -$7.400M | -$3.800M |
| YoY Change | -157.26% | -31.48% | 111.11% |
| Cash From Investing Activities | -$502.4M | -$514.9M | -$448.2M |
| YoY Change | 15.55% | 13.61% | 12.13% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | |||
| YoY Change | |||
| Common Stock Issuance & Retirement, Net | |||
| YoY Change | |||
| Debt Paid & Issued, Net | |||
| YoY Change | |||
| Cash From Financing Activities | 299.3M | 638.1M | 196.2M |
| YoY Change | 94.73% | 56.13% | -5.45% |
| NET CHANGE | |||
| Cash From Operating Activities | 212.6M | -121.8M | 240.3M |
| Cash From Investing Activities | -502.4M | -514.9M | -448.2M |
| Cash From Financing Activities | 299.3M | 638.1M | 196.2M |
| Net Change In Cash | 9.500M | 1.400M | -11.70M |
| YoY Change | -196.94% | 250.0% | 46.25% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $212.6M | -$121.8M | $240.3M |
| Capital Expenditures | -$509.5M | -$507.5M | -$444.4M |
| Free Cash Flow | $722.1M | $385.7M | $684.7M |
| YoY Change | 4.09% | -20.85% | 17.63% |
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|
275100000 | USD |
| CY2017Q4 | ni |
Longterm Debt Future Minimum Payments Due Thereafter
LongtermDebtFutureMinimumPaymentsDueThereafter
|
6045000000 | USD |
| CY2017Q4 | ni |
Longterm Debt Future Minimum Payments Duein Five Years
LongtermDebtFutureMinimumPaymentsDueinFiveYears
|
710000000 | USD |
| CY2017Q4 | ni |
Longterm Debt Future Minimum Payments Duein Four Years
LongtermDebtFutureMinimumPaymentsDueinFourYears
|
63600000 | USD |
| CY2017Q4 | ni |
Longterm Debt Future Minimum Payments Duein Three Years
LongtermDebtFutureMinimumPaymentsDueinThreeYears
|
325100000 | USD |
| CY2017Q4 | ni |
Longterm Debt Future Minimum Payments Duein Two Years
LongtermDebtFutureMinimumPaymentsDueinTwoYears
|
296100000 | USD |
| CY2015 | ni |
Miscellaneous Non Operating Income Expense
MiscellaneousNonOperatingIncomeExpense
|
9900000 | USD |
| CY2016 | ni |
Miscellaneous Non Operating Income Expense
MiscellaneousNonOperatingIncomeExpense
|
-9000000 | USD |
| CY2017 | ni |
Miscellaneous Non Operating Income Expense
MiscellaneousNonOperatingIncomeExpense
|
-100000 | USD |
| CY2016Q4 | ni |
Net Asset Value Excluded From Fair Value By Input
NetAssetValueExcludedFromFairValueByInput
|
1014500000 | USD |
| CY2017Q4 | ni |
Net Asset Value Excluded From Fair Value By Input
NetAssetValueExcludedFromFairValueByInput
|
1032300000 | USD |
| CY2017Q4 | ni |
Non Utility Plant Net Book Value
NonUtilityPlantNetBookValue
|
247.8 | USD |
| CY2017 | ni |
Number Of Customers
NumberOfCustomers
|
3900000 | |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Due
OtherLiabilitiesFutureMinimumPaymentsDue
|
28700000 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Due Next Twelve Months
OtherLiabilitiesFutureMinimumPaymentsDueNextTwelveMonths
|
28700000 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Due Thereafter
OtherLiabilitiesFutureMinimumPaymentsDueThereafter
|
0 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Duein Five Years
OtherLiabilitiesFutureMinimumPaymentsDueinFiveYears
|
0 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Duein Four Years
OtherLiabilitiesFutureMinimumPaymentsDueinFourYears
|
0 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Duein Three Years
OtherLiabilitiesFutureMinimumPaymentsDueinThreeYears
|
0 | USD |
| CY2017Q4 | ni |
Other Liabilities Future Minimum Payments Duein Two Years
OtherLiabilitiesFutureMinimumPaymentsDueinTwoYears
|
0 | USD |
| CY2016Q4 | ni |
Other Regulatory Assets
OtherRegulatoryAssets
|
449200000 | USD |
| CY2017Q4 | ni |
Other Regulatory Assets
OtherRegulatoryAssets
|
309500000 | USD |
| CY2016 | ni |
Payments Pure Air
PaymentsPureAir
|
21700000 | USD |
| CY2017 | ni |
Payments Pure Air
PaymentsPureAir
|
22000000 | USD |
| CY2015 | ni |
Payments To Acquire Property Plant And Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments
PaymentsToAcquirePropertyPlantAndEquipmentIncludingCaptialExpendituresFromCurrentLiabilitiesAndEquityMethodInvestments
|
1367500000 | USD |
| CY2016 | ni |
Payments To Acquire Property Plant And Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments
PaymentsToAcquirePropertyPlantAndEquipmentIncludingCaptialExpendituresFromCurrentLiabilitiesAndEquityMethodInvestments
|
1490400000 | USD |
| CY2017 | ni |
Payments To Acquire Property Plant And Equipment Including Captial Expenditures From Current Liabilities And Equity Method Investments
PaymentsToAcquirePropertyPlantAndEquipmentIncludingCaptialExpendituresFromCurrentLiabilitiesAndEquityMethodInvestments
|
1753800000 | USD |
| CY2017 | ni |
Percentage Of Additional Subset Of Assets Capped
PercentageOfAdditionalSubsetOfAssetsCapped
|
0.10 | |
| CY2015 | ni |
Pre Tax Rate For Allowance For Funds Used During Construction
PreTaxRateForAllowanceForFundsUsedDuringConstruction
|
0.047 | |
| CY2016 | ni |
Pre Tax Rate For Allowance For Funds Used During Construction
PreTaxRateForAllowanceForFundsUsedDuringConstruction
|
0.045 | |
| CY2017 | ni |
Pre Tax Rate For Allowance For Funds Used During Construction
PreTaxRateForAllowanceForFundsUsedDuringConstruction
|
0.040 | |
| CY2016Q4 | ni |
Public Utilities Property Plant And Equipment Other Property At Cost Less Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyAtCostLessAccumulatedDepreciation
|
313700000 | USD |
| CY2017Q4 | ni |
Public Utilities Property Plant And Equipment Other Property At Cost Less Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyAtCostLessAccumulatedDepreciation
|
286500000 | USD |
| CY2016Q4 | ni |
Public Utilities Property Plant And Equipment Plant In Service Net
PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet
|
12754300000 | USD |
| CY2017Q4 | ni |
Public Utilities Property Plant And Equipment Plant In Service Net
PublicUtilitiesPropertyPlantAndEquipmentPlantInServiceNet
|
14073000000 | USD |
| CY2017 | ni |
Reductionin Deferred Tax Liability Due To Tax Law Change
ReductioninDeferredTaxLiabilityDueToTaxLawChange
|
1300000000 | USD |
| CY2017 | ni |
Reductionin Regulatory Deferredtax Liabilities
ReductioninRegulatoryDeferredtaxLiabilities
|
400000000 | USD |
| CY2017Q4 | ni |
Regulatory Assets Requiring Specific Rate Action
RegulatoryAssetsRequiringSpecificRateAction
|
398400000 | USD |
| CY2015 | ni |
Securitization Transaction Fees
SecuritizationTransactionFees
|
2500000 | USD |
| CY2016 | ni |
Securitization Transaction Fees
SecuritizationTransactionFees
|
2300000 | USD |
| CY2017 | ni |
Securitization Transaction Fees
SecuritizationTransactionFees
|
2500000 | USD |
| CY2017Q4 | ni |
Security Interest And Other Subset Of Asset
SecurityInterestAndOtherSubsetOfAsset
|
150000000 | USD |
| CY2017 | ni |
Service Area By County
ServiceAreaByCounty
|
20 | |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Due
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDue
|
311500000 | USD |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Due Thereafter
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDueThereafter
|
0 | USD |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Duein Five Years
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDueinFiveYears
|
37500000 | USD |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Duein Four Years
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDueinFourYears
|
50700000 | USD |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Duein Three Years
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDueinThreeYears
|
63500000 | USD |
| CY2017Q4 | ni |
Service Obligations Ibm Service Obligations Future Minimum Payments Duein Two Years
ServiceObligationsIBMServiceObligationsFutureMinimumPaymentsDueinTwoYears
|
71500000 | USD |
| CY2017Q4 | ni |
Service Obligations It Service Obligations Future Minimum Payments Due Next Twelve Months
ServiceObligationsITServiceObligationsFutureMinimumPaymentsDueNextTwelveMonths
|
88300000 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Due
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDue
|
178200000 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Due Next Twelve Months
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueNextTwelveMonths
|
48300000 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Due Thereafter
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueThereafter
|
0 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Duein Five Years
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueinFiveYears
|
0 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Duein Four Years
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueinFourYears
|
43300000 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Duein Three Years
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueinThreeYears
|
43300000 | USD |
| CY2017Q4 | ni |
Service Obligations Other Service Obligations Future Minimum Payments Duein Two Years
ServiceObligationsOtherServiceObligationsFutureMinimumPaymentsDueinTwoYears
|
43300000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Due
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDue
|
2649900000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Due Next Twelve Months
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueNextTwelveMonths
|
538900000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Due Thereafter
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueThereafter
|
524100000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Duein Five Years
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueinFiveYears
|
331000000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Duein Four Years
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueinFourYears
|
344700000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Duein Three Years
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueinThreeYears
|
390700000 | USD |
| CY2017Q4 | ni |
Service Obligations Pipeline Service Obligations Future Minimum Payments Duein Two Years
ServiceObligationsPipelineServiceObligationsFutureMinimumPaymentsDueinTwoYears
|
520500000 | USD |
| CY2017 | ni |
Transfersbetween Fair Value Hierarchies
TransfersbetweenFairValueHierarchies
|
0 | |
| CY2016Q4 | ni |
Unrecovered Gas And Fuel Costs
UnrecoveredGasAndFuelCosts
|
25900000 | USD |
| CY2013Q3 | ni |
Seven Year Planof Eligible Investments Lengthof Plan
SevenYearPlanofEligibleInvestmentsLengthofPlan
|
seven-year | |
| CY2017 | ni |
Stock Issued During Period At The Market Program
StockIssuedDuringPeriodAtTheMarketProgram
|
11931000 | shares |
| CY2015 | ni |
Stock Issued During Period Shares Retirement Savings Plan
StockIssuedDuringPeriodSharesRetirementSavingsPlan
|
1644000 | shares |
| CY2016 | ni |
Stock Issued During Period Shares Retirement Savings Plan
StockIssuedDuringPeriodSharesRetirementSavingsPlan
|
1793000 | shares |
| CY2017 | ni |
Stock Issued During Period Shares Retirement Savings Plan
StockIssuedDuringPeriodSharesRetirementSavingsPlan
|
1396000 | shares |
| CY2015 | ni |
Stock Issued During Period Value Defined Contribution And Profit Sharing Plan
StockIssuedDuringPeriodValueDefinedContributionAndProfitSharingPlan
|
46700000 | USD |
| CY2016 | ni |
Stock Issued During Period Value Defined Contribution And Profit Sharing Plan
StockIssuedDuringPeriodValueDefinedContributionAndProfitSharingPlan
|
41400000 | USD |
| CY2017 | ni |
Stock Issued During Period Value Defined Contribution And Profit Sharing Plan
StockIssuedDuringPeriodValueDefinedContributionAndProfitSharingPlan
|
34300000 | USD |
| CY2017 | ni |
Tua Related Charge
TUARelatedCharge
|
8600000 | USD |
| CY2017 | ni |
Taxbenefitffromfavorableestimatetoactualadjustments
Taxbenefitffromfavorableestimatetoactualadjustments
|
3600000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Due
TotalFutureMinimumLeasePaymentsDue
|
18112700000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Due Next Twelve Months
TotalFutureMinimumLeasePaymentsDueNextTwelveMonths
|
1478100000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Due Thereafter
TotalFutureMinimumLeasePaymentsDueThereafter
|
11791900000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Duein Five Years
TotalFutureMinimumLeasePaymentsDueinFiveYears
|
1406100000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Duein Four Years
TotalFutureMinimumLeasePaymentsDueinFourYears
|
840800000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Duein Three Years
TotalFutureMinimumLeasePaymentsDueinThreeYears
|
1236800000 | USD |
| CY2017Q4 | ni |
Total Future Minimum Lease Payments Duein Two Years
TotalFutureMinimumLeasePaymentsDueinTwoYears
|
1359000000 | USD |
| CY2016Q4 | ni |
Trade Receivables Available For Transfer
TradeReceivablesAvailableForTransfer
|
618300000 | USD |
| CY2017Q4 | ni |
Trade Receivables Available For Transfer
TradeReceivablesAvailableForTransfer
|
635300000 | USD |
| CY2016Q4 | ni |
Trade Receivables Not Transferred
TradeReceivablesNotTransferred
|
308300000 | USD |
| CY2017Q4 | ni |
Trade Receivables Not Transferred
TradeReceivablesNotTransferred
|
298600000 | USD |
| CY2016Q4 | ni |
Trade Receivables Transferred Net
TradeReceivablesTransferredNet
|
310000000 | USD |
| CY2017Q4 | ni |
Trade Receivables Transferred Net
TradeReceivablesTransferredNet
|
336700000 | USD |
| CY2015 | ni |
Transaction Costs Relatedto Separation
TransactionCostsRelatedtoSeparation
|
55400000 | USD |
| CY2015 | ni |
Transferof Cashand Cash Equivalents At Separation
TransferofCashandCashEquivalentsAtSeparation
|
-136800000 | USD |
| CY2016 | ni |
Transferof Cashand Cash Equivalents At Separation
TransferofCashandCashEquivalentsAtSeparation
|
0 | USD |
| CY2017 | ni |
Transferof Cashand Cash Equivalents At Separation
TransferofCashandCashEquivalentsAtSeparation
|
0 | USD |
| CY2017Q4 | ni |
Unrecovered Gas And Fuel Costs
UnrecoveredGasAndFuelCosts
|
0 | USD |
| CY2008Q3 | ni |
Wind Power Purchase Agreement Capacity
WindPowerPurchaseAgreementCapacity
|
100 | MW |
| CY2016Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
539400000 | USD |
| CY2017Q4 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
625600000 | USD |
| CY2016Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
847000000 | USD |
| CY2017Q4 | us-gaap |
Accounts Receivable Net Current
AccountsReceivableNetCurrent
|
898900000 | USD |
| CY2016Q4 | us-gaap |
Accrual For Environmental Loss Contingencies
AccrualForEnvironmentalLossContingencies
|
111400000 | USD |
| CY2017Q4 | us-gaap |
Accrual For Environmental Loss Contingencies
AccrualForEnvironmentalLossContingencies
|
111400000 | USD |
| CY2016Q4 | us-gaap |
Accrued Insurance Noncurrent
AccruedInsuranceNoncurrent
|
82800000 | USD |
| CY2017Q4 | us-gaap |
Accrued Insurance Noncurrent
AccruedInsuranceNoncurrent
|
80100000 | USD |
| CY2016Q4 | us-gaap |
Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
|
13400000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Deferred Investment Tax Credit
AccumulatedDeferredInvestmentTaxCredit
|
12400000 | USD |
| CY2016Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
6981700000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
7290400000 | USD |
| CY2014Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-50600000 | USD |
| CY2015Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-35100000 | USD |
| CY2016Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-25100000 | USD |
| CY2015 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
18800000 | USD |
| CY2015Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
254000000 | USD |
| CY2017Q4 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-43400000 | USD |
| CY2016Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
5153900000 | USD |
| CY2017Q4 | us-gaap |
Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
|
5529100000 | USD |
| CY2016 | us-gaap |
Adjustment For Amortization
AdjustmentForAmortization
|
199500000 | USD |
| CY2017 | us-gaap |
Adjustment For Amortization
AdjustmentForAmortization
|
210500000 | USD |
| CY2016 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
15100000 | USD |
| CY2017 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
15300000 | USD |
| CY2016Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
23300000 | USD |
| CY2017Q4 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
18300000 | USD |
| CY2015 | us-gaap |
Amortization Of Debt Discount Premium
AmortizationOfDebtDiscountPremium
|
8700000 | USD |
| CY2016 | us-gaap |
Amortization Of Debt Discount Premium
AmortizationOfDebtDiscountPremium
|
7600000 | USD |
| CY2017 | us-gaap |
Amortization Of Debt Discount Premium
AmortizationOfDebtDiscountPremium
|
7400000 | USD |
| CY2015 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
11000000 | USD |
| CY2016 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
11000000 | USD |
| CY2017 | us-gaap |
Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
|
11000000 | USD |
| CY2015 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
0 | shares |
| CY2016 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
0 | shares |
| CY2017 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
0 | shares |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
0 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
2400000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
7500000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
15600000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
6900000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
9000000 | USD |
| CY2016Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
262600000 | USD |
| CY2017Q4 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
268700000 | USD |
| CY2015Q4 | us-gaap |
Assets
Assets
|
17492500000 | USD |
| CY2016Q4 | us-gaap |
Assets
Assets
|
18691900000 | USD |
| CY2017Q4 | us-gaap |
Assets
Assets
|
19961700000 | USD |
| CY2016Q4 | us-gaap |
Assets Current
AssetsCurrent
|
1762100000 | USD |
| CY2017Q4 | us-gaap |
Assets Current
AssetsCurrent
|
1763300000 | USD |
| CY2016Q4 | us-gaap |
Assets Fair Value Disclosure Recurring
AssetsFairValueDisclosureRecurring
|
180500000 | USD |
| CY2017Q4 | us-gaap |
Assets Fair Value Disclosure Recurring
AssetsFairValueDisclosureRecurring
|
155000000 | USD |
| CY2016Q4 | us-gaap |
Available For Sale Securities
AvailableForSaleSecurities
|
131500000 | USD |
| CY2017Q4 | us-gaap |
Available For Sale Securities
AvailableForSaleSecurities
|
133900000 | USD |
| CY2016Q4 | us-gaap |
Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
400000 | USD |
| CY2017Q4 | us-gaap |
Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
|
900000 | USD |
| CY2016Q4 | us-gaap |
Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
2600000 | USD |
| CY2017Q4 | us-gaap |
Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
|
700000 | USD |
| CY2016Q4 | us-gaap |
Available For Sale Securities Amortized Cost
AvailableForSaleSecuritiesAmortizedCost
|
133700000 | USD |
| CY2017Q4 | us-gaap |
Available For Sale Securities Amortized Cost
AvailableForSaleSecuritiesAmortizedCost
|
133700000 | USD |
| CY2015 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
121600000 | USD |
| CY2016 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
125300000 | USD |
| CY2017 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
173000000 | USD |
| CY2016Q4 | us-gaap |
Capital Lease Obligations
CapitalLeaseObligations
|
157400000 | USD |
| CY2017Q4 | us-gaap |
Capital Lease Obligations
CapitalLeaseObligations
|
153100000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due
CapitalLeasesFutureMinimumPaymentsDue
|
254400000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due Current
CapitalLeasesFutureMinimumPaymentsDueCurrent
|
18100000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Five Years
CapitalLeasesFutureMinimumPaymentsDueInFiveYears
|
15500000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Four Years
CapitalLeasesFutureMinimumPaymentsDueInFourYears
|
15500000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Three Years
CapitalLeasesFutureMinimumPaymentsDueInThreeYears
|
15400000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due In Two Years
CapitalLeasesFutureMinimumPaymentsDueInTwoYears
|
15700000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Due Thereafter
CapitalLeasesFutureMinimumPaymentsDueThereafter
|
174200000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Future Minimum Payments Interest Included In Payments
CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments
|
91900000 | USD |
| CY2016 | us-gaap |
Capital Leases Indemnification Agreements Payments
CapitalLeasesIndemnificationAgreementsPayments
|
167000000 | USD |
| CY2017 | us-gaap |
Capital Leases Indemnification Agreements Payments
CapitalLeasesIndemnificationAgreementsPayments
|
171200000 | USD |
| CY2016Q4 | us-gaap |
Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation
CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
|
20600000 | USD |
| CY2017Q4 | us-gaap |
Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation
CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
|
32400000 | USD |
| CY2016Q4 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
10129400000 | USD |
| CY2017Q4 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
11832300000 | USD |
| CY2015 | us-gaap |
Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
|
41100000 | USD |
| CY2016 | us-gaap |
Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
|
41400000 | USD |
| CY2017 | us-gaap |
Capitalized Computer Software Amortization1
CapitalizedComputerSoftwareAmortization1
|
44000000 | USD |
| CY2016Q4 | us-gaap |
Capitalized Computer Software Gross
CapitalizedComputerSoftwareGross
|
156400000 | USD |
| CY2017Q4 | us-gaap |
Capitalized Computer Software Gross
CapitalizedComputerSoftwareGross
|
189000000 | USD |
| CY2016Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
26400000 | USD |
| CY2017Q4 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
29000000 | USD |
| CY2014Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
49800000 | USD |
| CY2015Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
45200000 | USD |
| CY2016Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
36000000 | USD |
| CY2017Q4 | us-gaap |
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
|
38400000 | USD |
| CY2015 | us-gaap |
Cash Provided By Used In Financing Activities Discontinued Operations
CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
|
108600000 | USD |
| CY2016 | us-gaap |
Cash Provided By Used In Financing Activities Discontinued Operations
CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
|
0 | USD |
| CY2017 | us-gaap |
Cash Provided By Used In Financing Activities Discontinued Operations
CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations
|
0 | USD |
| CY2015 | us-gaap |
Cash Provided By Used In Investing Activities Discontinued Operations
CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
|
-430100000 | USD |
| CY2016 | us-gaap |
Cash Provided By Used In Investing Activities Discontinued Operations
CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
|
0 | USD |
| CY2017 | us-gaap |
Cash Provided By Used In Investing Activities Discontinued Operations
CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations
|
0 | USD |
| CY2015 | us-gaap |
Cash Provided By Used In Operating Activities Discontinued Operations
CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
|
293400000 | USD |
| CY2016 | us-gaap |
Cash Provided By Used In Operating Activities Discontinued Operations
CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
|
-800000 | USD |
| CY2017 | us-gaap |
Cash Provided By Used In Operating Activities Discontinued Operations
CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations
|
100000 | USD |
| CY2016Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
1178000000 | USD |
| CY2017Q4 | us-gaap |
Commercial Paper
CommercialPaper
|
869000000 | USD |
| CY2016Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
0 | USD |
| CY2017Q4 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
0 | USD |
| CY2015 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.83 | |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.64 | |
| CY2017 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
0.70 | |
| CY2015 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
1.02 | |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.83 | |
| CY2017 | us-gaap |
Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
|
0.70 | |
| CY2016Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
| CY2017Q4 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
0.01 | |
| CY2016Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
400000000 | shares |
| CY2017Q4 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
400000000 | shares |
| CY2016Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
323159672 | shares |
| CY2017Q4 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
337015806 | shares |
| CY2016Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
3300000 | USD |
| CY2017Q4 | us-gaap |
Common Stock Value
CommonStockValue
|
3400000 | USD |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
275500000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
341500000 | USD |
| CY2017 | us-gaap |
Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
|
110200000 | USD |
| CY2015 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
291100000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
341500000 | USD |
| CY2017 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
110200000 | USD |
| CY2015 | us-gaap |
Cost Of Revenue
CostOfRevenue
|
1643700000 | USD |
| CY2016 | us-gaap |
Cost Of Revenue
CostOfRevenue
|
1390200000 | USD |
| CY2017 | us-gaap |
Cost Of Revenue
CostOfRevenue
|
1518700000 | USD |
| CY2015Q4 | us-gaap |
Cumulative Effect Of New Accounting Principle In Period Of Adoption
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
|
25300000 | USD |
| CY2015 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
0 | USD |
| CY2016 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
0 | USD |
| CY2017 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
0 | USD |
| CY2015 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
6000000 | USD |
| CY2016 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
-100000 | USD |
| CY2017 | us-gaap |
Current Income Tax Expense Benefit
CurrentIncomeTaxExpenseBenefit
|
7800000 | USD |
| CY2015 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
6000000 | USD |
| CY2016 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
-100000 | USD |
| CY2017 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
7800000 | USD |
| CY2016Q4 | us-gaap |
Customer Deposits Current
CustomerDepositsCurrent
|
264100000 | USD |
| CY2017Q4 | us-gaap |
Customer Deposits Current
CustomerDepositsCurrent
|
262600000 | USD |
| CY2016Q4 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
6421300000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
7796500000 | USD |
| CY2017 | us-gaap |
Debt Instrument Convertible Conversion Ratio1
DebtInstrumentConvertibleConversionRatio1
|
67.6 | |
| CY2017Q4 | us-gaap |
Debt Instrument Face Amount
DebtInstrumentFaceAmount
|
500000000 | USD |
| CY2016Q4 | us-gaap |
Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net
DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
|
-41600000 | USD |
| CY2017Q4 | us-gaap |
Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net
DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
|
-71500000 | USD |
| CY2015 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
124100000 | USD |
| CY2016 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
165600000 | USD |
| CY2017 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
302700000 | USD |
| CY2015 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
137700000 | USD |
| CY2016 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
183600000 | USD |
| CY2017 | us-gaap |
Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
|
307700000 | USD |
| CY2016Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
3798600000 | USD |
| CY2017Q4 | us-gaap |
Deferred Income Tax Liabilities
DeferredIncomeTaxLiabilities
|
2570200000 | USD |
| CY2015 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
135300000 | USD |
| CY2016 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
182300000 | USD |
| CY2017 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
306700000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
1270600000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
1292900000 | USD |
| CY2017 | us-gaap |
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets
DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
|
0.0725 | |
| CY2015 | us-gaap |
Deferred Other Tax Expense Benefit
DeferredOtherTaxExpenseBenefit
|
-2400000 | USD |
| CY2016 | us-gaap |
Deferred Other Tax Expense Benefit
DeferredOtherTaxExpenseBenefit
|
-1400000 | USD |
| CY2017 | us-gaap |
Deferred Other Tax Expense Benefit
DeferredOtherTaxExpenseBenefit
|
-1000000 | USD |
| CY2015 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
13600000 | USD |
| CY2016 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
18000000 | USD |
| CY2017 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
5000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
1277300000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
|
646200000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Operating Loss Carryforwards
DeferredTaxAssetsOperatingLossCarryforwards
|
576000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
177100000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
97400000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax
DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
|
1700000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits
|
261700000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits
DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits
|
136700000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
|
47000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities
DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
|
24000000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
2528000000 | USD |
| CY2017Q4 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
1292900000 | USD |
| CY2016Q4 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
2528000000 | USD |
| CY2017 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1
|
25900000 | USD |
| CY2017 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1
|
900000 | USD |
| CY2017 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation
|
29700000 | USD |
| CY2017 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents
|
1100000 | USD |
| CY2016Q4 | us-gaap |
Defined Benefit Plan Fair Value Of Plan Assets
DefinedBenefitPlanFairValueOfPlanAssets
|
1982300000 | USD |
| CY2017Q4 | us-gaap |
Defined Benefit Plan Fair Value Of Plan Assets
DefinedBenefitPlanFairValueOfPlanAssets
|
2422500000 | USD |
| CY2015 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
27400000 | USD |
| CY2016 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
32300000 | USD |
| CY2017 | us-gaap |
Defined Contribution Plan Cost Recognized
DefinedContributionPlanCostRecognized
|
37600000 | USD |
| CY2017 | us-gaap |
Defined Contribution Plan Employer Matching Contribution Percent
DefinedContributionPlanEmployerMatchingContributionPercent
|
0.03 | |
| CY2015 | us-gaap |
Depreciation
Depreciation
|
449000000 | USD |
| CY2016 | us-gaap |
Depreciation
Depreciation
|
475100000 | USD |
| CY2017 | us-gaap |
Depreciation
Depreciation
|
501500000 | USD |
| CY2015 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
524400000 | USD |
| CY2016 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
547100000 | USD |
| CY2017 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
570300000 | USD |
| CY2016Q4 | us-gaap |
Derivative Assets
DerivativeAssets
|
49000000 | USD |
| CY2017Q4 | us-gaap |
Derivative Assets
DerivativeAssets
|
21100000 | USD |
| CY2016Q4 | us-gaap |
Derivative Instruments And Hedges Liabilities Noncurrent
DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent
|
44500000 | USD |
| CY2017Q4 | us-gaap |
Derivative Instruments And Hedges Liabilities Noncurrent
DerivativeInstrumentsAndHedgesLiabilitiesNoncurrent
|
28500000 | USD |
| CY2015 | us-gaap |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net
DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
|
0 | USD |
| CY2016 | us-gaap |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net
DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
|
0 | USD |
| CY2017Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.65 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.14 | |
| CY2015 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.90 | |
| CY2016Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.58 | |
| CY2016Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.09 | |
| CY2016Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.08 | |
| CY2016Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.28 | |
| CY2016 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.03 | |
| CY2017 | us-gaap |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net
DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
|
0 | USD |
| CY2016Q4 | us-gaap |
Derivative Liabilities
DerivativeLiabilities
|
61300000 | USD |
| CY2017Q4 | us-gaap |
Derivative Liabilities
DerivativeLiabilities
|
71700000 | USD |
| CY2016Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
16800000 | USD |
| CY2017Q4 | us-gaap |
Derivative Liabilities Current
DerivativeLiabilitiesCurrent
|
43200000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Costs Of Goods Sold
DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
|
200000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Depreciation And Amortization
DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
|
66400000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Interest Expense
DisposalGroupIncludingDiscontinuedOperationInterestExpense
|
37100000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Operating Expense
DisposalGroupIncludingDiscontinuedOperationOperatingExpense
|
466800000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Operating Income Loss
DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
|
218000000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Other Expense
DisposalGroupIncludingDiscontinuedOperationOtherExpense
|
8200000 | USD |
| CY2015 | us-gaap |
Disposal Group Including Discontinued Operation Revenue
DisposalGroupIncludingDiscontinuedOperationRevenue
|
655700000 | USD |
| CY2017 | us-gaap |
Dividend Payable Date To Be Paid Day Month And Year
DividendPayableDateToBePaidDayMonthAndYear
|
2018-02-20 | |
| CY2015 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
263500000 | USD |
| CY2016 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
205700000 | USD |
| CY2017 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
229400000 | USD |
| CY2017 | us-gaap |
Dividends Common Stock Stock
DividendsCommonStockStock
|
0.195 | USD |
| CY2017 | us-gaap |
Dividends Payable Date Of Record Day Month And Year
DividendsPayableDateOfRecordDayMonthAndYear
|
2018-02-09 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.04 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-0.16 | |
| CY2017 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.39 | |
| CY2015 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.90 | |
| CY2016Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.58 | |
| CY2016Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.09 | |
| CY2016Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.08 | |
| CY2016Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.27 | |
| CY2016 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.02 | |
| CY2017Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.65 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.14 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.04 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-0.16 | |
| CY2017 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.39 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.416 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.357 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
|
0.710 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.35 | |
| CY2017Q4 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
|
19400000 | USD |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
|
P1Y08M | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.350 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
0.000 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
0.000 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
|
0.364 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.009 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.019 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
0.015 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Charitable Contributions
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCharitableContributions
|
0.052 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Charitable Contributions
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCharitableContributions
|
0.005 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Charitable Contributions
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCharitableContributions
|
-0.003 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
-0.004 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
-0.003 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciation
|
-0.005 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
-0.017 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.002 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
|
0.004 | |
| CY2015 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.044 | |
| CY2016 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.022 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
|
0.015 | |
| CY2015 | us-gaap |
Electric Domestic Regulated Revenue
ElectricDomesticRegulatedRevenue
|
1572900000 | USD |
| CY2016 | us-gaap |
Electric Domestic Regulated Revenue
ElectricDomesticRegulatedRevenue
|
1660800000 | USD |
| CY2017 | us-gaap |
Electric Domestic Regulated Revenue
ElectricDomesticRegulatedRevenue
|
1785500000 | USD |
| CY2016Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
161400000 | USD |
| CY2017Q4 | us-gaap |
Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
|
195400000 | USD |
| CY2015 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
7200000 | USD |
| CY2016 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
5800000 | USD |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
5900000 | USD |
| CY2016Q4 | us-gaap |
Energy Related Inventory Coal
EnergyRelatedInventoryCoal
|
112800000 | USD |
| CY2017Q4 | us-gaap |
Energy Related Inventory Coal
EnergyRelatedInventoryCoal
|
80100000 | USD |
| CY2016Q4 | us-gaap |
Energy Related Inventory Natural Gas In Storage
EnergyRelatedInventoryNaturalGasInStorage
|
279900000 | USD |
| CY2017Q4 | us-gaap |
Energy Related Inventory Natural Gas In Storage
EnergyRelatedInventoryNaturalGasInStorage
|
285100000 | USD |
| CY2016Q4 | us-gaap |
Excess Of Replacement Or Current Costs Over Stated Lifo Value
ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue
|
9400000 | USD |
| CY2017Q4 | us-gaap |
Excess Of Replacement Or Current Costs Over Stated Lifo Value
ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue
|
17400000 | USD |
| CY2016 | us-gaap |
Excess Tax Benefit From Share Based Compensation Operating Activities
ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
|
7200000 | USD |
| CY2017 | us-gaap |
Excess Tax Benefit From Share Based Compensation Operating Activities
ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
|
4400000 | USD |
| CY2017 | us-gaap |
Finite Lived Intangible Asset Useful Life
FiniteLivedIntangibleAssetUsefulLife
|
P40Y | |
| CY2016Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
242700000 | USD |
| CY2017Q4 | us-gaap |
Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
|
231700000 | USD |
| CY2015 | us-gaap |
Gain Loss On Cash Flow Hedge Ineffectiveness Net
GainLossOnCashFlowHedgeIneffectivenessNet
|
0 | USD |
| CY2016 | us-gaap |
Gain Loss On Cash Flow Hedge Ineffectiveness Net
GainLossOnCashFlowHedgeIneffectivenessNet
|
0 | USD |
| CY2017 | us-gaap |
Gain Loss On Cash Flow Hedge Ineffectiveness Net
GainLossOnCashFlowHedgeIneffectivenessNet
|
0 | USD |
| CY2015 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
-97200000 | USD |
| CY2016 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
0 | USD |
| CY2017 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
-111500000 | USD |
| CY2015 | us-gaap |
Gas Domestic Regulated Revenue
GasDomesticRegulatedRevenue
|
2081900000 | USD |
| CY2016 | us-gaap |
Gas Domestic Regulated Revenue
GasDomesticRegulatedRevenue
|
1850900000 | USD |
| CY2017 | us-gaap |
Gas Domestic Regulated Revenue
GasDomesticRegulatedRevenue
|
2063200000 | USD |
| CY2016Q4 | us-gaap |
Goodwill
Goodwill
|
1690700000 | USD |
| CY2017Q4 | us-gaap |
Goodwill
Goodwill
|
1690700000 | USD |
| CY2015 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
198600000 | USD |
| CY2016Q1 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
186600000 | USD |
| CY2016Q4 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.28 | |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
1.02 | |
| CY2017Q1 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.65 | |
| CY2017Q2 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
-0.14 | |
| CY2017Q3 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.04 | |
| CY2017Q4 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
-0.16 | |
| CY2015 | us-gaap |
Gross Profit
GrossProfit
|
4651800000 | USD |
| CY2016 | us-gaap |
Gross Profit
GrossProfit
|
4492500000 | USD |
| CY2017 | us-gaap |
Gross Profit
GrossProfit
|
4874600000 | USD |
| CY2015 | us-gaap |
Impairment Of Investments
ImpairmentOfInvestments
|
0 | USD |
| CY2016 | us-gaap |
Impairment Of Investments
ImpairmentOfInvestments
|
0 | USD |
| CY2017 | us-gaap |
Impairment Of Investments
ImpairmentOfInvestments
|
0 | USD |
| CY2016Q2 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
29000000 | USD |
| CY2016Q3 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
23700000 | USD |
| CY2016Q4 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
88800000 | USD |
| CY2016 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
328100000 | USD |
| CY2017Q1 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
211300000 | USD |
| CY2017Q2 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
-44300000 | USD |
| CY2017Q3 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
14000000 | USD |
| CY2017Q4 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
-52400000 | USD |
| CY2017 | us-gaap |
Income Loss From Continuing Operations
IncomeLossFromContinuingOperations
|
128600000 | USD |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
339900000 | USD |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
510200000 | USD |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Domestic
IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
|
443100000 | USD |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.63 | |
| CY2016Q1 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.58 | |
| CY2016Q2 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.09 | |
| CY2016Q3 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.07 | |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
|
0.39 | |
| CY2015 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.63 | |
| CY2016Q1 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.58 | |
| CY2016Q2 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.09 | |
| CY2016Q3 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.07 | |
| CY2016Q4 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.27 | |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
1.01 | |
| CY2017Q1 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.65 | |
| CY2017Q2 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
-0.14 | |
| CY2017Q3 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.04 | |
| CY2017Q4 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
-0.16 | |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
|
0.39 | |
| CY2015 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
|
-103500000 | USD |
| CY2016 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
|
-3400000 | USD |
| CY2017 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
|
100000 | USD |
| CY2015 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
-87900000 | USD |
| CY2016Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
0 | USD |
| CY2016Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
-100000 | USD |
| CY2016Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
3500000 | USD |
| CY2016Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
0 | USD |
| CY2016 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
-3400000 | USD |
| CY2017Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
0 | USD |
| CY2017Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
-100000 | USD |
| CY2017Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
0 | USD |
| CY2017Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
0 | USD |
| CY2017 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
|
100000 | USD |
| CY2015 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.27 | |
| CY2016Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2016Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2016Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.01 | |
| CY2016Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2016 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.01 | |
| CY2017Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2017Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2017Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2017Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2017 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
|
0.00 | |
| CY2015 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.27 | |
| CY2016Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2016Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2016Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.01 | |
| CY2016Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2016 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.01 | |
| CY2017Q1 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2017Q2 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2017Q3 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2017Q4 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2017 | us-gaap |
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
|
0.00 | |
| CY2015 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
141300000 | USD |
| CY2016 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
182100000 | USD |
| CY2017 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
314500000 | USD |
| CY2015 | us-gaap |
Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
2900000 | USD |
| CY2016 | us-gaap |
Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
9500000 | USD |
| CY2017 | us-gaap |
Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends
|
6500000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
0 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
0 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
161100000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
118900000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
178600000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
155000000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Charitable Contributions
IncomeTaxReconciliationNondeductibleExpenseCharitableContributions
|
17800000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Charitable Contributions
IncomeTaxReconciliationNondeductibleExpenseCharitableContributions
|
2800000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Depreciation
IncomeTaxReconciliationNondeductibleExpenseDepreciation
|
-1500000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Charitable Contributions
IncomeTaxReconciliationNondeductibleExpenseCharitableContributions
|
-1200000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Depreciation
IncomeTaxReconciliationNondeductibleExpenseDepreciation
|
-1600000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
|
1600000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
52300000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
35500000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Nondeductible Expense Depreciation
IncomeTaxReconciliationNondeductibleExpenseDepreciation
|
-2400000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
|
-5700000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Other Adjustments
IncomeTaxReconciliationOtherAdjustments
|
400000 | USD |
| CY2015 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
14800000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
11300000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
6900000 | USD |
| CY2015 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
21300000 | USD |
| CY2016 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
8000000 | USD |
| CY2017 | us-gaap |
Income Taxes Paid
IncomeTaxesPaid
|
5500000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
-190500000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
108800000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Accounts Payable
IncreaseDecreaseInAccountsPayable
|
49000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
-262200000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
|
188000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
-52300000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
-2500000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
25600000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
-44800000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Employee Related Liabilities
IncreaseDecreaseInEmployeeRelatedLiabilities
|
-380900000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Interest Payable Net
IncreaseDecreaseInInterestPayableNet
|
-11600000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Interest Payable Net
IncreaseDecreaseInInterestPayableNet
|
-8700000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Interest Payable Net
IncreaseDecreaseInInterestPayableNet
|
-33900000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
-46900000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
-38900000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
-19000000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
-30400000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
500000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
-34500000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Property And Other Taxes Payable
IncreaseDecreaseInPropertyAndOtherTaxesPayable
|
8700000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Property And Other Taxes Payable
IncreaseDecreaseInPropertyAndOtherTaxesPayable
|
12100000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Property And Other Taxes Payable
IncreaseDecreaseInPropertyAndOtherTaxesPayable
|
10200000 | USD |
| CY2015 | us-gaap |
Increase Decrease In Regulatory Assets And Liabilities
IncreaseDecreaseInRegulatoryAssetsAndLiabilities
|
-82000000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Regulatory Assets And Liabilities
IncreaseDecreaseInRegulatoryAssetsAndLiabilities
|
187900000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Regulatory Assets And Liabilities
IncreaseDecreaseInRegulatoryAssetsAndLiabilities
|
-57500000 | USD |
| CY2015 | us-gaap |
Incremental Common Shares Attributable To Contingently Issuable Shares
IncrementalCommonSharesAttributableToContingentlyIssuableShares
|
0 | shares |
| CY2016 | us-gaap |
Incremental Common Shares Attributable To Contingently Issuable Shares
IncrementalCommonSharesAttributableToContingentlyIssuableShares
|
165000 | shares |
| CY2017 | us-gaap |
Incremental Common Shares Attributable To Contingently Issuable Shares
IncrementalCommonSharesAttributableToContingentlyIssuableShares
|
547000 | shares |
| CY2015 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
2090000 | shares |
| CY2016 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
1554000 | shares |
| CY2017 | us-gaap |
Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
|
821000 | shares |
| CY2016Q4 | us-gaap |
Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
|
242700000 | USD |
| CY2017Q4 | us-gaap |
Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
|
231700000 | USD |
| CY2015 | us-gaap |
Interest Expense
InterestExpense
|
380200000 | USD |
| CY2016 | us-gaap |
Interest Expense
InterestExpense
|
349500000 | USD |
| CY2017 | us-gaap |
Interest Expense
InterestExpense
|
353200000 | USD |
| CY2015 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
377500000 | USD |
| CY2016 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
352300000 | USD |
| CY2017 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
354800000 | USD |
| CY2015 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
16100000 | USD |
| CY2016 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
18800000 | USD |
| CY2017 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
16400000 | USD |
| CY2015 | us-gaap |
Interest Expense Short Term Borrowings
InterestExpenseShortTermBorrowings
|
2200000 | USD |
| CY2016 | us-gaap |
Interest Expense Short Term Borrowings
InterestExpenseShortTermBorrowings
|
9200000 | USD |
| CY2017 | us-gaap |
Interest Expense Short Term Borrowings
InterestExpenseShortTermBorrowings
|
14900000 | USD |
| CY2015 | us-gaap |
Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
|
800000 | USD |
| CY2016 | us-gaap |
Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
|
3400000 | USD |
| CY2017 | us-gaap |
Interest Income Expense Nonoperating Net
InterestIncomeExpenseNonoperatingNet
|
4600000 | USD |
| CY2015 | us-gaap |
Interest Paid Net
InterestPaidNet
|
390400000 | USD |
| CY2016 | us-gaap |
Interest Paid Net
InterestPaidNet
|
337800000 | USD |
| CY2017 | us-gaap |
Interest Paid Net
InterestPaidNet
|
339900000 | USD |
| CY2016Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
120300000 | USD |
| CY2017Q4 | us-gaap |
Interest Payable Current
InterestPayableCurrent
|
112300000 | USD |
| CY2016Q4 | us-gaap |
Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
|
101700000 | USD |
| CY2017Q4 | us-gaap |
Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
|
105900000 | USD |
| CY2016Q4 | us-gaap |
Investments And Other Noncurrent Assets
InvestmentsAndOtherNoncurrentAssets
|
199900000 | USD |
| CY2017Q4 | us-gaap |
Investments And Other Noncurrent Assets
InvestmentsAndOtherNoncurrentAssets
|
209600000 | USD |
| CY2016Q4 | us-gaap |
Investments In Affiliates Subsidiaries Associates And Joint Ventures
InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
|
6600000 | USD |
| CY2017Q4 | us-gaap |
Investments In Affiliates Subsidiaries Associates And Joint Ventures
InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
|
5500000 | USD |
| CY2016Q4 | us-gaap |
Lifo Inventory Amount
LIFOInventoryAmount
|
46100000 | USD |
| CY2017Q4 | us-gaap |
Lifo Inventory Amount
LIFOInventoryAmount
|
45500000 | USD |
| CY2016Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
18691900000 | USD |
| CY2017Q4 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
19961700000 | USD |
| CY2016Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
3452200000 | USD |
| CY2017Q4 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
3178400000 | USD |
| CY2016Q4 | us-gaap |
Liabilities Fair Value Disclosure Recurring
LiabilitiesFairValueDisclosureRecurring
|
61300000 | USD |
| CY2017Q4 | us-gaap |
Liabilities Fair Value Disclosure Recurring
LiabilitiesFairValueDisclosureRecurring
|
71700000 | USD |
| CY2016Q4 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
5110300000 | USD |
| CY2017Q4 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
4951000000 | USD |
| CY2015Q1 | us-gaap |
Limited Liability Company Llc Or Limited Partnership Lp Members Or Limited Partners Ownership Interest
LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
|
0.084 | |
| CY2017Q4 | us-gaap |
Line Of Credit
LineOfCredit
|
0 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations
LongTermDebtAndCapitalLeaseObligations
|
6058200000 | USD |
| CY2017Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations
LongTermDebtAndCapitalLeaseObligations
|
7512200000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations Current
LongTermDebtAndCapitalLeaseObligationsCurrent
|
363100000 | USD |
| CY2017Q4 | us-gaap |
Long Term Debt And Capital Lease Obligations Current
LongTermDebtAndCapitalLeaseObligationsCurrent
|
284300000 | USD |
| CY2016Q4 | us-gaap |
Long Term Debt Fair Value
LongTermDebtFairValue
|
7064100000 | USD |
| CY2017Q4 | us-gaap |
Long Term Debt Fair Value
LongTermDebtFairValue
|
8603400000 | USD |
| CY2016Q4 | us-gaap |
Medium Term Notes
MediumTermNotes
|
241500000 | USD |
| CY2017Q4 | us-gaap |
Medium Term Notes
MediumTermNotes
|
157000000 | USD |
| CY2015 | us-gaap |
Minority Interest Decrease From Distributions To Noncontrolling Interest Holders
MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
|
227100000 | USD |
| CY2015 | us-gaap |
Natural Gas Midstream Revenue
NaturalGasMidstreamRevenue
|
969800000 | USD |
| CY2016 | us-gaap |
Natural Gas Midstream Revenue
NaturalGasMidstreamRevenue
|
964600000 | USD |
| CY2017 | us-gaap |
Natural Gas Midstream Revenue
NaturalGasMidstreamRevenue
|
1021500000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
23000000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
-8400000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Continuing Operations
NetCashProvidedByUsedInContinuingOperations
|
2300000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Discontinued Operations
NetCashProvidedByUsedInDiscontinuedOperations
|
-28100000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Discontinued Operations
NetCashProvidedByUsedInDiscontinuedOperations
|
-800000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Discontinued Operations
NetCashProvidedByUsedInDiscontinuedOperations
|
100000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
-3411600000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
790500000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
|
1068700000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
-3520200000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
790500000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
1068700000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
1949700000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-1603000000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
|
-1808500000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
2379800000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-1603000000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-1808500000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
1456800000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
803300000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
|
742200000 | USD |
| CY2015 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
1163400000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
804100000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
742100000 | USD |
| CY2015 | us-gaap |
Net Income Loss
NetIncomeLoss
|
286500000 | USD |
| CY2016Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
186600000 | USD |
| CY2016Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
28900000 | USD |
| CY2016Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
27200000 | USD |
| CY2016Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
88800000 | USD |
| CY2016 | us-gaap |
Net Income Loss
NetIncomeLoss
|
331500000 | USD |
| CY2017Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
211300000 | USD |
| CY2017Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-44400000 | USD |
| CY2017Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
14000000 | USD |
| CY2017Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-52400000 | USD |
| CY2017 | us-gaap |
Net Income Loss
NetIncomeLoss
|
128500000 | USD |
| CY2015 | us-gaap |
Noncash Or Part Noncash Acquisition Fixed Assets Acquired1
NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1
|
47500000 | USD |
| CY2016 | us-gaap |
Noncash Or Part Noncash Acquisition Fixed Assets Acquired1
NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1
|
4000000 | USD |
| CY2017 | us-gaap |
Noncash Or Part Noncash Acquisition Fixed Assets Acquired1
NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1
|
11500000 | USD |
| CY2015 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-460000000 | USD |
| CY2016 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-348000000 | USD |
| CY2017 | us-gaap |
Nonoperating Income Expense
NonoperatingIncomeExpense
|
-467500000 | USD |
| CY2017 | us-gaap |
Number Of Reportable Segments
NumberOfReportableSegments
|
2 | |
| CY2015 | us-gaap |
Operating Expenses
OperatingExpenses
|
3851900000 | USD |
| CY2016 | us-gaap |
Operating Expenses
OperatingExpenses
|
3634300000 | USD |
| CY2017 | us-gaap |
Operating Expenses
OperatingExpenses
|
3964000000 | USD |
| CY2017Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
270000000 | USD |
| CY2017 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
910600000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due
OperatingLeasesFutureMinimumPaymentsDue
|
57200000 | USD |
| CY2015 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
799900000 | USD |
| CY2016Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
381400000 | USD |
| CY2016Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
138200000 | USD |
| CY2016Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
113700000 | USD |
| CY2016Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
224900000 | USD |
| CY2016 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
858200000 | USD |
| CY2017Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
416500000 | USD |
| CY2017Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
124500000 | USD |
| CY2017Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
99600000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
|
13800000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
|
4400000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
|
6200000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
|
7300000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
|
10200000 | USD |
| CY2017Q4 | us-gaap |
Operating Leases Future Minimum Payments Due Thereafter
OperatingLeasesFutureMinimumPaymentsDueThereafter
|
15300000 | USD |
| CY2015 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
47500000 | USD |
| CY2016 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
52000000 | USD |
| CY2017 | us-gaap |
Operating Leases Rent Expense Net
OperatingLeasesRentExpenseNet
|
49500000 | USD |
| CY2017Q4 | us-gaap |
Operating Loss Carryforwards Valuation Allowance
OperatingLossCarryforwardsValuationAllowance
|
508500000 | USD |
| CY2016Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
130600000 | USD |
| CY2017Q4 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
132800000 | USD |
| CY2016Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
3661900000 | USD |
| CY2017Q4 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
3629300000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
|
-800000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
|
-100000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
|
800000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
|
-16500000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
|
7600000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
|
-21700000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
|
-7800000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
|
8600000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
|
-22500000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-11000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
10000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-18300000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
|
15600000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
|
0 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
|
0 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
-11000000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
10000000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
|
-18300000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
|
2400000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
|
-1500000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
|
-3400000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
|
4600000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
|
-100000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
|
-2100000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
-4800000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
5600000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
-13900000 | USD |
| CY2015 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
-400000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
-100000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
400000 | USD |
| CY2016Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
65900000 | USD |
| CY2017Q4 | us-gaap |
Other Liabilities Current
OtherLiabilitiesCurrent
|
90800000 | USD |
| CY2016Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
200500000 | USD |
| CY2017Q4 | us-gaap |
Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
|
194400000 | USD |
| CY2016Q4 | us-gaap |
Other Long Term Investments
OtherLongTermInvestments
|
193300000 | USD |
| CY2017Q4 | us-gaap |
Other Long Term Investments
OtherLongTermInvestments
|
204100000 | USD |
| CY2015 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
17400000 | USD |
| CY2016 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
1500000 | USD |
| CY2017 | us-gaap |
Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
|
-2800000 | USD |
| CY2015 | us-gaap |
Other Operating Activities Cash Flow Statement
OtherOperatingActivitiesCashFlowStatement
|
13100000 | USD |
| CY2016 | us-gaap |
Other Operating Activities Cash Flow Statement
OtherOperatingActivitiesCashFlowStatement
|
-3800000 | USD |
| CY2017 | us-gaap |
Other Operating Activities Cash Flow Statement
OtherOperatingActivitiesCashFlowStatement
|
6500000 | USD |
| CY2015 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
27200000 | USD |
| CY2016 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
16200000 | USD |
| CY2017 | us-gaap |
Other Sales Revenue Net
OtherSalesRevenueNet
|
4400000 | USD |
| CY2015 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-18000000 | USD |
| CY2016 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
12400000 | USD |
| CY2017 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-1600000 | USD |
| CY2015 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
79200000 | USD |
| CY2016 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
110100000 | USD |
| CY2017 | us-gaap |
Payments For Removal Costs
PaymentsForRemovalCosts
|
109000000 | USD |
| CY2015 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
20400000 | USD |
| CY2016 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
9400000 | USD |
| CY2017 | us-gaap |
Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
|
7200000 | USD |
| CY2015 | us-gaap |
Payments Of Debt Extinguishment Costs
PaymentsOfDebtExtinguishmentCosts
|
97200000 | USD |
| CY2016 | us-gaap |
Payments Of Debt Extinguishment Costs
PaymentsOfDebtExtinguishmentCosts
|
0 | USD |
| CY2017 | us-gaap |
Payments Of Debt Extinguishment Costs
PaymentsOfDebtExtinguishmentCosts
|
111500000 | USD |
| CY2015 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
263400000 | USD |
| CY2016 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
205500000 | USD |
| CY2017 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
229100000 | USD |
| CY2015 | us-gaap |
Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
|
54900000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
|
38300000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
|
168400000 | USD |
| CY2015 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
1360700000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
1475200000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
1695800000 | USD |
| CY2016Q4 | us-gaap |
Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
|
713400000 | USD |
| CY2017Q4 | us-gaap |
Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
|
337100000 | USD |
| CY2016Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
296900000 | USD |
| CY2017Q4 | us-gaap |
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
|
293100000 | USD |
| CY2015Q1 | us-gaap |
Proceeds From Issuance Initial Public Offering
ProceedsFromIssuanceInitialPublicOffering
|
1168400000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
22500000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
23100000 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Common Stock
ProceedsFromIssuanceOfCommonStock
|
336700000 | USD |
| CY2015 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
0 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
500000000 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
3250000000 | USD |
| CY2015 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-93500000 | USD |
| CY2016 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-3700000 | USD |
| CY2017 | us-gaap |
Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
|
-144300000 | USD |
| CY2015 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
-936400000 | USD |
| CY2016 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
920600000 | USD |
| CY2017 | us-gaap |
Proceeds From Repayments Of Short Term Debt
ProceedsFromRepaymentsOfShortTermDebt
|
-282400000 | USD |
| CY2015 | us-gaap |
Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
|
58400000 | USD |
| CY2016 | us-gaap |
Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
|
33000000 | USD |
| CY2017 | us-gaap |
Proceeds From Sale Of Available For Sale Securities Debt
ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
|
163100000 | USD |
| CY2015 | us-gaap |
Profit Loss
ProfitLoss
|
302100000 | USD |
| CY2016 | us-gaap |
Profit Loss
ProfitLoss
|
331500000 | USD |
| CY2017 | us-gaap |
Profit Loss
ProfitLoss
|
128500000 | USD |
| CY2016Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
20049700000 | USD |
| CY2017Q4 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
21649900000 | USD |
| CY2016Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
13068000000 | USD |
| CY2017Q4 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
14359500000 | USD |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Additions
PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
|
11500000 | USD |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Additions
PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
|
11600000 | USD |
| CY2017 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Additions
PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions
|
12600000 | USD |
| CY2015 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
11500000 | USD |
| CY2016 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
11600000 | USD |
| CY2017 | us-gaap |
Public Utilities Allowance For Funds Used During Construction Capitalized Interest
PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedInterest
|
12600000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
6613700000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Accumulated Depreciation
PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
|
6953600000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
13068000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Net
PublicUtilitiesPropertyPlantAndEquipmentNet
|
14359500000 | USD |
| CY2016Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
19368000000 | USD |
| CY2017Q4 | us-gaap |
Public Utilities Property Plant And Equipment Plant In Service
PublicUtilitiesPropertyPlantAndEquipmentPlantInService
|
21026600000 | USD |
| CY2015 | us-gaap |
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
|
5500000 | USD |
| CY2016 | us-gaap |
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
|
2400000 | USD |
| CY2017 | us-gaap |
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
|
3400000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Assets
RegulatoryAssets
|
1885400000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Assets
RegulatoryAssets
|
1801200000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
248700000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
176300000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
1636700000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
1624900000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Liabilities
RegulatoryLiabilities
|
1381800000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Liabilities
RegulatoryLiabilities
|
2795600000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
116700000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
58700000 | USD |
| CY2016Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
1265100000 | USD |
| CY2017Q4 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
2736900000 | USD |
| CY2015 | us-gaap |
Related Party Transaction Other Revenues From Transactions With Related Party
RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
|
147600000 | USD |
| CY2016 | us-gaap |
Related Party Transaction Other Revenues From Transactions With Related Party
RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
|
150500000 | USD |
| CY2017 | us-gaap |
Related Party Transaction Other Revenues From Transactions With Related Party
RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty
|
151600000 | USD |
| CY2017 | us-gaap |
Remaining Recovery Period Of Regulatory Assets For Which No Return On Investment During Recovery Period Is Provided1
RemainingRecoveryPeriodOfRegulatoryAssetsForWhichNoReturnOnInvestmentDuringRecoveryPeriodIsProvided1
|
P41Y | |
| CY2015 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
2092200000 | USD |
| CY2016 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
434600000 | USD |
| CY2017 | us-gaap |
Repayments Of Long Term Debt And Capital Securities
RepaymentsOfLongTermDebtAndCapitalSecurities
|
1855000000 | USD |
| CY2016Q4 | us-gaap |
Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
|
9600000 | USD |
| CY2017Q4 | us-gaap |
Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
|
9400000 | USD |
| CY2016Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
-972200000 | USD |
| CY2017Q4 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
-1073100000 | USD |
| CY2015 | us-gaap |
Revenues
Revenues
|
4651800000 | USD |
| CY2016 | us-gaap |
Revenues
Revenues
|
4492500000 | USD |
| CY2017 | us-gaap |
Revenues
Revenues
|
4874600000 | USD |
| CY2016Q1 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
1436600000 | USD |
| CY2016Q2 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
897600000 | USD |
| CY2016Q3 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
861300000 | USD |
| CY2016Q4 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
1297000000 | USD |
| CY2017Q1 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
1598600000 | USD |
| CY2017Q2 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
990700000 | USD |
| CY2017Q3 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
917000000 | USD |
| CY2017Q4 | us-gaap |
Sales Revenue Net
SalesRevenueNet
|
1368300000 | USD |
| CY2016Q4 | us-gaap |
Senior Notes
SeniorNotes
|
5968000000 | USD |
| CY2017Q4 | us-gaap |
Senior Notes
SeniorNotes
|
7516900000 | USD |
| CY2015 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
50700000 | USD |
| CY2016 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
46500000 | USD |
| CY2017 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
40100000 | USD |
| CY2017Q4 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
|
4455389 | shares |
| CY2015Q2 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
|
8000000 | shares |
| CY2014Q4 | us-gaap |
Shares Issued
SharesIssued
|
316037000 | shares |
| CY2015Q4 | us-gaap |
Shares Issued
SharesIssued
|
319110000 | shares |
| CY2016Q4 | us-gaap |
Shares Issued
SharesIssued
|
323160000 | shares |
| CY2016Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
195400000 | USD |
| CY2017Q4 | us-gaap |
Taxes Payable Current
TaxesPayableCurrent
|
208100000 | USD |
| CY2017Q4 | us-gaap |
Shares Issued
SharesIssued
|
337016000 | shares |
| CY2016Q4 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
1488000000 | USD |
| CY2017Q4 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
1205700000 | USD |
| CY2015 | us-gaap |
Stock Issued During Period Shares Dividend Reinvestment Plan
StockIssuedDuringPeriodSharesDividendReinvestmentPlan
|
275000 | shares |
| CY2016 | us-gaap |
Stock Issued During Period Shares Dividend Reinvestment Plan
StockIssuedDuringPeriodSharesDividendReinvestmentPlan
|
386000 | shares |
| CY2017 | us-gaap |
Stock Issued During Period Shares Dividend Reinvestment Plan
StockIssuedDuringPeriodSharesDividendReinvestmentPlan
|
264000 | shares |
| CY2015 | us-gaap |
Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
|
203000 | shares |
| CY2016 | us-gaap |
Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
|
201000 | shares |
| CY2017 | us-gaap |
Stock Issued During Period Shares Employee Stock Purchase Plans
StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
|
207000 | shares |
| CY2015 | us-gaap |
Stock Issued During Period Shares Share Based Compensation
StockIssuedDuringPeriodSharesShareBasedCompensation
|
1423000 | shares |
| CY2016 | us-gaap |
Stock Issued During Period Shares Share Based Compensation
StockIssuedDuringPeriodSharesShareBasedCompensation
|
2103000 | shares |
| CY2017 | us-gaap |
Stock Issued During Period Shares Share Based Compensation
StockIssuedDuringPeriodSharesShareBasedCompensation
|
351000 | shares |
| CY2015 | us-gaap |
Stock Issued During Period Value Dividend Reinvestment Plan
StockIssuedDuringPeriodValueDividendReinvestmentPlan
|
7300000 | USD |
| CY2016 | us-gaap |
Stock Issued During Period Value Dividend Reinvestment Plan
StockIssuedDuringPeriodValueDividendReinvestmentPlan
|
8900000 | USD |
| CY2017 | us-gaap |
Stock Issued During Period Value Dividend Reinvestment Plan
StockIssuedDuringPeriodValueDividendReinvestmentPlan
|
6400000 | USD |
| CY2015 | us-gaap |
Stock Issued During Period Value Employee Stock Purchase Plan
StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
|
5100000 | USD |
| CY2016 | us-gaap |
Stock Issued During Period Value Employee Stock Purchase Plan
StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
|
4700000 | USD |
| CY2017 | us-gaap |
Stock Issued During Period Value Employee Stock Purchase Plan
StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
|
5000000 | USD |
| CY2016 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
100000 | USD |
| CY2017 | us-gaap |
Stock Issued During Period Value New Issues
StockIssuedDuringPeriodValueNewIssues
|
314700000 | USD |
| CY2015 | us-gaap |
Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
|
4200000 | USD |
| CY2016 | us-gaap |
Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
|
20900000 | USD |
| CY2017 | us-gaap |
Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
|
14900000 | USD |
| CY2014Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
6175300000 | USD |
| CY2015Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
3843500000 | USD |
| CY2016Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
4071200000 | USD |
| CY2017Q4 | us-gaap |
Stockholders Equity
StockholdersEquity
|
4320100000 | USD |
| CY2015 | us-gaap |
Stockholders Equity Note Spinoff Transaction
StockholdersEquityNoteSpinoffTransaction
|
-2615800000 | USD |
| CY2017 | us-gaap |
Tax Credit Carryforward Expiration Date
TaxCreditCarryforwardExpirationDate
|
2037-12-31 | |
| CY2015 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
256100000 | USD |
| CY2016 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
244300000 | USD |
| CY2017 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
257200000 | USD |
| CY2016Q4 | us-gaap |
Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount
TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
|
310000000 | USD |
| CY2017Q4 | us-gaap |
Transfers Accounted For As Secured Borrowings Associated Liabilities Carrying Amount
TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
|
336700000 | USD |
| CY2015 | us-gaap |
Treasury Stock Shares Acquired
TreasuryStockSharesAcquired
|
472000 | shares |
| CY2016 | us-gaap |
Treasury Stock Shares Acquired
TreasuryStockSharesAcquired
|
433000 | shares |
| CY2017 | us-gaap |
Treasury Stock Shares Acquired
TreasuryStockSharesAcquired
|
293000 | shares |
| CY2016Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
88700000 | USD |
| CY2017Q4 | us-gaap |
Treasury Stock Value
TreasuryStockValue
|
95900000 | USD |
| CY2015 | us-gaap |
Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
|
20400000 | USD |
| CY2016 | us-gaap |
Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
|
9400000 | USD |
| CY2017 | us-gaap |
Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
|
7200000 | USD |
| CY2016Q4 | us-gaap |
Unbilled Receivables Current
UnbilledReceivablesCurrent
|
329700000 | USD |
| CY2017Q4 | us-gaap |
Unbilled Receivables Current
UnbilledReceivablesCurrent
|
359400000 | USD |
| CY2017Q4 | us-gaap |
Unrecognized Tax Benefits Income Tax Penalties Accrued
UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued
|
0 | USD |
| CY2015 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
1426100000 | USD |
| CY2016 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
1453700000 | USD |
| CY2017 | us-gaap |
Utilities Operating Expense Maintenance And Operations
UtilitiesOperatingExpenseMaintenanceAndOperations
|
1612300000 | USD |
| CY2017Q4 | us-gaap |
Variable Interest Entity Entity Maximum Loss Exposure Amount
VariableInterestEntityEntityMaximumLossExposureAmount
|
0 | USD |
| CY2016Q4 | us-gaap |
Weighted Average Cost Inventory Amount
WeightedAverageCostInventoryAmount
|
233800000 | USD |
| CY2017Q4 | us-gaap |
Weighted Average Cost Inventory Amount
WeightedAverageCostInventoryAmount
|
239600000 | USD |
| CY2015 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
319836000 | shares |
| CY2016 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
323524000 | shares |
| CY2017 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
330756000 | shares |
| CY2015 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
317746000 | shares |
| CY2016 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
321805000 | shares |
| CY2017 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
329388000 | shares |
| CY2017 | us-gaap |
Description Of New Accounting Pronouncements Not Yet Adopted
DescriptionOfNewAccountingPronouncementsNotYetAdopted
|
<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Recently Issued Accounting Pronouncements</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NiSource is currently evaluating the impact of certain ASUs on its Consolidated Financial Statements or Notes to Consolidated Financial Statements, which are described below:</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="4" rowspan="1"></td></tr><tr><td style="width:19%;" rowspan="1" colspan="1"></td><td style="width:30%;" rowspan="1" colspan="1"></td><td style="width:19%;" rowspan="1" colspan="1"></td><td style="width:32%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Standard</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Description</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Effective Date</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Effect on the financial statements or other significant matters</font></div></td></tr><tr><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ASU 2016-13, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Financial Instruments-Credit Losses (Topic 326)</font></div></td><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The pronouncement changes the impairment model for most financial assets, replacing the current "incurred loss" model. ASU 2016-13 will require the use of an "expected loss" model for instruments measured at amortized cost and will also require entities to record allowances for available-for-sale debt securities rather than reduce the carrying amount.</font></div></td><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Annual periods beginning after December 15, 2019, including interim periods therein. Early adoption is permitted for annual or interim periods beginning after December 15, 2018.</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:top;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NiSource is currently evaluating the impact of adoption, if any, on the Consolidated Financial Statements and Notes to Consolidated Financial Statements.</font></div></td></tr></table></div><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="4" rowspan="1"></td></tr><tr><td style="width:19%;" rowspan="1" colspan="1"></td><td style="width:30%;" rowspan="1" colspan="1"></td><td style="width:19%;" rowspan="1" colspan="1"></td><td style="width:32%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Standard</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Description</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Effective Date</font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-bottom:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:center;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Effect on the financial statements or other significant matters</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ASU 2018-01, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Leases (Topic 842): Land Easement Practical Expedient for Transition to Topic 842</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The pronouncement offers a practical expedient for accounting for land easements under ASU 2016-02. This practical expedient allows an entity the option of not evaluating existing land easements under ASC 842. New or modified land easements will still require evaluation under ASC 842 on a prospective basis beginning on the date of adoption.</font></div></td><td rowspan="2" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Annual periods beginning after December 15, 2018, including interim periods therein. Early adoption is permitted.</font></div></td><td rowspan="2" style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NiSource has formed an internal stakeholder group that meets periodically to share information and gather data related to leasing activity at NiSource. This includes compiling a list of all contracts that could meet the definition of a lease under the new standard and evaluating the accounting for these contracts under the new standard to determine the ultimate impact the new standard will have on NiSource’s financial statements. Also, this procedure has identified process improvements to ensure data from newly initiated leases is captured to comply with the new standard. This work included the assistance of a third-party advisory firm. NiSource maintains a substantial number of easements and expects ASU 2018-01 will ease the process of implementation of ASC 842. NiSource plans to adopt these standards effective January 1, 2019. </font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ASU 2016-02, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Leases (Topic 842)</font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The pronouncement introduces a lessee model that brings most leases on the balance sheet. The standard requires that lessees recognize the following for all leases (with the exception of short-term leases, as that term is defined in the standard) at the lease commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term.</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="padding-bottom:2px;padding-top:2px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">ASU 2018-02, </font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Income Statement-Reporting</font></div><div style="padding-bottom:2px;padding-top:2px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Other Comprehensive Income</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The pronouncement permits entities the option to reclassify tax effects that are stranded in accumulated other comprehensive income as a result of the implementation of the TCJA to retained earnings.</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Annual periods beginning after December 15, 2018, including interim periods therein. Early adoption is permitted for interim periods beginning after December 15, 2017.</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">NiSource is currently evaluating the</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">impact of adoption on the</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Consolidated Financial Statements and</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Notes to Consolidated Financial</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Statements.</font></div><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div> | |
| CY2017 | us-gaap |
Revenue Recognition Accounting Policy Gross And Net Revenue Disclosure
RevenueRecognitionAccountingPolicyGrossAndNetRevenueDisclosure
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<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Revenue Recognition.</font><font style="font-family:inherit;font-size:10pt;">    Revenue is recorded as products and services are delivered. Utility revenues are billed to customers monthly on a cycle basis. Revenues are recorded on the accrual basis and also include estimates for electricity and gas delivered but not billed. The accruals for unbilled revenues are reversed in the subsequent accounting period when meters are actually read and customers are billed.</font></div><div style="line-height:120%;padding-top:12px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">On occasion, NiSource's regulated subsidiaries are permitted to implement new rates that have not been formally approved by their state regulatory commissions, which are subject to refund. As permitted by accounting principles generally accepted in the United States, each regulated subsidiary recognizes this revenue and establishes a reserve for amounts that could be refunded based on its experience for the jurisdiction in which the rates were implemented. In connection with such revenues, estimated rate refund liabilities are recorded which reflect management’s current judgment of the ultimate outcomes of the proceedings. No provisions are made when, in the opinion of management, the facts and circumstances preclude a reasonable estimate of the outcome.</font></div></div> | |
| CY2017 | us-gaap |
Use Of Estimates
UseOfEstimates
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<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:10px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates.</font><font style="font-family:inherit;font-size:10pt;">    The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</font></div></div> |
