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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income/(loss) $ 207 $ (2,701)
Reconciliation of net income/(loss) to net cash provided by operating activities:    
Depreciation and amortization 374 333
(Gains)/losses on asset sales and asset impairments, net 370 618
Goodwill impairment losses 0 2,515
Inventory valuation adjustments 0 232
Deferred income tax expense/(benefit) 11 (12)
(Gain)/loss on foreign currency revaluation (15) 23
Settlement of terminated interest rate hedging instruments 0 (100)
Change in fair value of Preferred Distribution Rate Reset Option (Note 8) (9) (17)
Equity earnings in unconsolidated entities (121) (191)
Distributions on earnings from unconsolidated entities 211 236
(Gain on)/impairment of investments in unconsolidated entities, net 0 91
Other 27 14
Changes in assets and liabilities, net of acquisitions (29) (67)
Net cash provided by operating activities 1,026 974
CASH FLOWS FROM INVESTING ACTIVITIES    
Cash paid in connection with acquisitions, net of cash acquired (32) (308)
Investments in unconsolidated entities (71) (314)
Additions to property, equipment and other (182) (472)
Proceeds from sales of assets 22 245
Other investing activities (20) (9)
Net cash used in investing activities (283) (858)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net repayments under commercial paper program (Note 6) (159) (93)
Net repayments under senior secured hedged inventory facility (Note 6) (167) (325)
Proceeds from the issuance of senior notes 0 748
Repayments of senior notes 0 (17)
Repurchase of common units (Note 7) (53) 0
Other financing activities (36) 94
Net cash used in financing activities (774) (85)
Effect of translation adjustment 2 (9)
Net increase/(decrease) in cash and cash equivalents and restricted cash (29) 22
Cash and cash equivalents and restricted cash, beginning of period 60 82
Cash and cash equivalents and restricted cash, end of period 31 104
Cash paid for:    
Interest, net of amounts capitalized 202 213
Income taxes, net of amounts refunded 27 51
Series A Preferred Units    
CASH FLOWS FROM FINANCING ACTIVITIES    
Distributions paid to unitholders (Note 7) (74) (74)
Series B Preferred Units    
CASH FLOWS FROM FINANCING ACTIVITIES    
Distributions paid to unitholders (Note 7) (25) (25)
Common Units    
CASH FLOWS FROM FINANCING ACTIVITIES    
Distributions paid to unitholders (Note 7) $ (260) $ (393)