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Investments Equity Earnings (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | $ 887 | $ 578 | $ 497
Amortization of excess costs | (95) | (61) | (59)
Gulf LNG Holdings Group LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 209 | 47 | 48
Citrus Corporation |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 169 | 108 | 102
SNG |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 141 | 77 | 58
NGPL Holdco LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 66 | 10 | 12
FEP |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 55 | 53 | 51
Plantation Pipe Line Company |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 55 | 46 | 37
Cortez Pipeline Company |  |  |
Net Investment Income [Line Items] |  |  |
Impairment at equity investee, other than temporary |  | (4) | 9
Income (Loss) from Equity Method Investments | 36 | 44 | 24
MEP |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 31 | 38 | 40
Ruby |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 26 | 44 | 15
Watco Companies LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 21 | 19 | 25
Red Cedar Gathering company |  |  |
Net Investment Income [Line Items] |  |  |
Impairment at equity investee, other than temporary |  | 10 |
Income (Loss) from Equity Method Investments | 18 | 14 | 24
Utopia Holding L.L.C. |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 14 | 0 | 0
Double Eagle Pipeline LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 10 | 7 | 5
Bear Creek Storage |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 9 | 8 | 2
EagleHawk |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 7 | 24 | 10
Liberty Pipeline Group LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 7 | 9 | 11
Sierrita Pipeline LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 7 | 7 | 7
Gulf Coast Express LLC |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | 2 | 0 | 0
All others |  |  |
Net Investment Income [Line Items] |  |  |
Income (Loss) from Equity Method Investments | $ 4 | $ 23 | $ 26

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