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Reportable Segments (Advances to and investments in affiliates) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | $ 2,893 | $ 2,947 | $ 3,060
Intrastate Transportation and Storage |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | 139 | 110 | 89
Interstate Transportation and Storage |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | 2,201 | 2,209 | 2,278
Midstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | 54 | 101 | 110
NGL and Refined Products Transportation and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | 446 | 476 | 509
Crude Oil Transportation and Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | 0 | 0 | 22
All Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Investments in unconsolidated affiliates | $ 53 | $ 51 | $ 52

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- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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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 No definition available. + Details
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