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Partners' Capital and Distributions - Subsidiary Common Units Distributions (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2026 | Jun. 30, 2026 | Mar. 31, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions |  | $ 449 |  | $ 418 | $ 898 | $ 874
Cash Distribution | Class C Shares |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions |  | $ 295 | $ 295 |  |  |
Distribution per common unit (usd per share) |  | $ 0.4175 | $ 0.4175 |  |  |
Cash Distribution | Class C Shares | Subsequent Event |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions | $ 295 |  |  |  |  |
Distribution per common unit (usd per share) | $ 0.4175 |  |  |  |  |
Public | Cash Distribution | Class C Shares |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions |  | $ 198 | $ 198 |  |  |
Public | Cash Distribution | Class C Shares | Subsequent Event |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions | $ 198 |  |  |  |  |
AAP | Cash Distribution | Class C Shares |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions |  | $ 97 | $ 97 |  |  |
AAP | Cash Distribution | Class C Shares | Subsequent Event |  |  |  |  |  |
Partners' Capital and Distributions [Line Items] |  |  |  |  |  |
Distributions | $ 97 |  |  |  |  |

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- Definition Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480100/505-10-S45-8 + Details
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- Definition Total distributions to each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480100/505-10-S45-8 + Details
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