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Investments - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Nov. 19, 2020 | Nov. 18, 2020 | Mar. 31, 2020 | Feb. 01, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Proceeds from sales of investments | $ 0 | $ 0 | $ 74 |  |  |  |
Share price (in usd per share) |  |  |  |  |  |  | $ 568
JWH midstream LLC (JWH) |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Business acquisition, percent acquired | 50.00% |  |  |  |  |  |
Equity method investments |  |  |  |  |  | $ 17 |
Payments to terminate involvement in partnership | $ 7 |  |  |  |  |  |
Impairment expense | 24 |  |  |  |  |  |
FTS international, inc. |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Investment, ownership percentage |  | 20.00% | 29.00% | 2.00% | 20.00% |  |
Investment, realized gain (loss) |  | $ 61 |  |  |  |  |
Number of shares sold (in shares) |  | 4.3 |  |  |  |  |
Proceeds from sales of investments |  | $ 74 |  |  |  |  |
Equity securities, cost |  | $ 65 |  |  |  |  |
Share price (in usd per share) |  | $ 1.04 |  |  |  |  |
Impairments of investments | $ 23 | $ 43 |  |  |  |  |
FTS international, inc. | IPO |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Investment, ownership percentage |  | 24.00% |  |  |  |  |
Investment, realized gain (loss) |  | $ 78 |  |  |  |  |

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