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Derivatives and Risk Management Activities - Preferred Distribution Rate (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Derivatives and Risk Management Activities |  |  |  |  |
Gain/(loss) recognized |  |  | $ 9 | $ 17 |
Preferred Distribution Rate Reset Option | Derivatives Not Designated as a Hedge | Other long-term liabilities and deferred credits |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |
Derivative liability | $ 5 |  | 5 |  | $ 14
Preferred Distribution Rate Reset Option | Derivatives Not Designated as a Hedge | Other expense, net |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |
Gain/(loss) recognized | $ 77 | $ (9) | $ 9 | $ 17 |

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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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