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Derivatives and Risk Management Activities - Preferred Distribution Rate (Details) - Preferred Distribution Rate Reset Option - Derivatives Not Designated as a Hedge - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Other long-term liabilities and deferred credits |  |  |
Derivatives and Risk Management Activities |  |  |
Derivative liability | $ 14 | $ 34 |
Other income/(expense), net |  |  |
Derivatives and Risk Management Activities |  |  |
Gain/(loss) recognized | $ 20 | $ 2 | $ (14)

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- Definition Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 15 -URI http://asc.fasb.org/subtopic&trid=2229187 + Details
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