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Investments Equity investments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Investments | $ 7,759.0 | $ 7,481.0 |
Earnings (Losses) from Equity Investments | 101.0 | 617.0 | $ 428.0
Amortization of excess costs | (83.0) | (95.0) | (61.0)
Notes Payable, Related Parties, Noncurrent | $ 157.0 | 148.0 |
Citrus Corporation |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 1,856.0 | 1,708.0 |
Earnings (Losses) from Equity Investments | $ 157.0 | 169.0 | 108.0
SNG |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 1,473.0 | 1,536.0 |
Earnings (Losses) from Equity Investments | $ 140.0 | 141.0 | 77.0
NGPL Holdings, LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 721.0 | 733.0 |
Earnings (Losses) from Equity Investments | 81.0 | 66.0 | 10.0
Notes Receivable, Related Parties, Noncurrent | 500.0 |  |
Notes Payable, Related Parties, Noncurrent | $ 500.0 |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% |  |
NGPL Holdings, LLC | Earnings from Equity Investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Interest | $ 8.4 |  |
Gulf Coast Express LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 34.00% |  |
Equity Investments | $ 656.0 | 240.0 |
Earnings (Losses) from Equity Investments | $ 37.0 | 2.0 | 0.0
MEP |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 439.0 | 235.0 |
Earnings (Losses) from Equity Investments | $ 15.0 | 31.0 | 38.0
Gulf LNG Holdings Group LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 361.0 | 361.0 |
Earnings (Losses) from Equity Investments | $ 17.0 | (61.0) | 47.0
Equity Method Investment, Other than Temporary Impairment |  | 270.0 |
Plantation Pipe Line Company |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 51.00% |  |
Equity Investments | $ 348.0 | 344.0 |
Earnings (Losses) from Equity Investments | $ 58.0 | 55.0 | 46.0
Utopia Holding L.L.C. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 335.0 | 333.0 |
Earnings (Losses) from Equity Investments | $ 20.0 | 14.0 | 0.0
Permian Highway Pipeline |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 27.00% |  |
Equity Investments | $ 309.0 | 45.0 |
Earnings (Losses) from Equity Investments | $ 0.0 | 0.0 | 0.0
EagleHawk |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 25.00% |  |
Equity Investments | $ 285.0 | 299.0 |
Earnings (Losses) from Equity Investments | 17.0 | 7.0 | 24.0
Watco Companies, LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Investments | 185.0 | 185.0 |
Earnings (Losses) from Equity Investments | $ 19.0 | 21.0 | 19.0
Common Unit, Issued | 13,000 |  |
Watco Companies, LLC | Preferred stock |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Common Unit, Issued | 100,000 |  |
Quarterly preferred distribution rate | 3.25% |  |
Watco Companies, LLC | Preferred Class B |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Common Unit, Issued | 50,000 |  |
Quarterly preferred distribution rate | 3.00% |  |
Watco Companies, LLC | Common Units |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 3.00% |  |
FEP |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 102.0 | 44.0 |
Earnings (Losses) from Equity Investments | $ 59.0 | 55.0 | (97.0)
Equity Method Investment, Other than Temporary Impairment |  |  | 150.0
Ruby |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 50.00% |  |
Equity Investments | $ 41.0 | 750.0 |
Earnings (Losses) from Equity Investments | (609.0) | 26.0 | 44.0
Equity Method Investment, Other than Temporary Impairment | $ 650.0 |  |
Cortez Pipeline Company |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership Interest | 53.00% |  |
Equity Investments | $ 26.0 | 15.0 |
Earnings (Losses) from Equity Investments | 35.0 | 36.0 | 44.0
All others |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Investments | 622.0 | 653.0 |
Earnings (Losses) from Equity Investments | $ 55.0 | $ 55.0 | $ 68.0

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