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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES      
Net income/(loss) $ (2,440) $ 2,062 $ 2,107
Reconciliation of net income/(loss) to net cash provided by operating activities:      
Depreciation and amortization 656 604 521
(Gains)/losses on asset sales and asset impairments, net (Note 6, Note 7) 719 28 (114)
Goodwill impairment losses (Note 8) 2,515 0 0
Equity-indexed compensation expense 16 35 79
Inventory valuation adjustments (Note 5) 233 11 8
Deferred income tax expense/(benefit) (218) 64 236
Settlement of terminated interest rate hedging instruments (100) (55) 14
Equity earnings in unconsolidated entities (355) (388) (375)
Distributions on earnings from unconsolidated entities 472 401 422
(Gain on)/impairment of investments in unconsolidated entities, net (Note 9) 182 (271) (200)
Other (12) 21 39
Changes in assets and liabilities, net of acquisitions:      
Trade accounts receivable and other 1,432 (1,158) 309
Inventory (304) (5) (75)
Trade accounts payable and other (1,286) 1,151 (367)
Net cash provided by operating activities 1,510 2,500 2,604
CASH FLOWS FROM INVESTING ACTIVITIES      
Cash paid in connection with acquisitions, net of cash acquired (Note 7) (310) (50)  
Investments in unconsolidated entities (Note 9) (461) (524) (468)
Additions to property, equipment and other (738) (1,181) (1,634)
Proceeds from sales of assets (Note 7) 429 77 1,334
Cash paid for purchases of linefill and base gas (14) (74) (45)
Other investing activities 1 (13)  
Net cash used in investing activities (1,093) (1,765) (813)
CASH FLOWS FROM FINANCING ACTIVITIES      
Net borrowings/(repayments) under PAA commercial paper program (Note 11) 456 93 (123)
Net borrowings/(repayments) under PAA senior secured hedged inventory facility (Note 11) (160) 325 (778)
Proceeds from PAA GO Zone term loans (Note 11)     200
Proceeds from the issuance of PAA senior notes (Note 11) 748 998  
Repayments of PAA senior notes (Note 11) (617) (1,000)  
Repurchase of common units by a subsidiary (Note 12) (50)    
Distributions paid to Class A shareholders (Note 12) (166) (231) (189)
Distributions paid to noncontrolling interests (Note 12) (697) (977) (843)
Sale of noncontrolling interest in a subsidiary (Note 12)   128  
Other financing activities 56 (53) (20)
Net cash used in financing activities (430) (717) (1,753)
Effect of translation adjustment (8) (3) (9)
Net increase/(decrease) in cash and cash equivalents and restricted cash (21) 15 29
Cash and cash equivalents and restricted cash, beginning of period 84 69 40
Cash and cash equivalents and restricted cash, end of period 63 84 69
Cash paid for:      
Interest, net of amounts capitalized 428 397 400
Income taxes, net of amounts refunded $ 111 $ 136 $ 21