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Derivatives and Risk Management Activities - Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Level 3 |  |  |  |
Rollforward of Level 3 Net Asset/(Liability) |  |  |  |
Beginning Balance | $ (147) | $ (189) | $ (2) |
Net gains/(losses) for the period included in earnings | (49) | 58 | (196) |
Settlements |  | 131 | 2 |
Ending Balance | (196) | 0 | (196) |
Change in unrealized gains/(losses) included in earnings relating to Level 3 derivatives still held at the end of the period | $ (49) |  | $ (196) |
Recurring Fair Value Measures |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 117 |  | $ 153
Recurring Fair Value Measures | Commodity derivatives |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 37 |  | 222
Recurring Fair Value Measures | Interest rate derivatives |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 80 |  | 120
Recurring Fair Value Measures | Preferred Distribution Rate Reset Option |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  |  |  | (189)
Recurring Fair Value Measures | Level 1 |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | (1) |  | (7)
Recurring Fair Value Measures | Level 1 | Commodity derivatives |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | (1) |  | (7)
Recurring Fair Value Measures | Level 2 |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 118 |  | 349
Recurring Fair Value Measures | Level 2 | Commodity derivatives |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 38 |  | 229
Recurring Fair Value Measures | Level 2 | Interest rate derivatives |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | 80 |  | 120
Recurring Fair Value Measures | Level 3 |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  | $ 0 |  | (189)
Recurring Fair Value Measures | Level 3 | Preferred Distribution Rate Reset Option |  |  |  |
Recurring Fair Value Measurements |  |  |  |
Total net derivative asset/(liability) |  |  |  | $ (189)

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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- Definition Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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