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Segment Information - Reconciliation of Segment Adjusted EBITDA (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting [Abstract]      
Segment Adjusted EBITDA $ 2,756 $ 2,685 $ 2,504
Total other segment items 60 90 425
Depreciation and amortization (1,026) (1,048) (965)
Gains/(losses) on asset sales, asset impairments and other, net (160) 152 (269)
Gains (losses) on investments in unconsolidated entities, net 15 28 346
Interest Expense, Nonoperating (430) (386) (405)
Other income/(expense), net 65 102 (219)
INCOME BEFORE TAX 1,280 1,623 1,417
Income tax expense (167) (121) (189)
NET INCOME 1,113 1,502 1,228
Net income attributable to noncontrolling interests (341) (272) (191)
NET INCOME ATTRIBUTABLE TO PAA $ 772 $ 1,230 $ 1,037