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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 970 $ 288
Reconciliation of net income to net cash provided by operating activities:    
Depreciation and amortization 136 127
(Gains)/losses on asset sales and asset impairments, net 4  
Equity-indexed compensation expense 17 17
Deferred income tax (benefit)/expense (6) 48
Loss on foreign currency revaluation 4 8
Change in fair value of Preferred Distribution Rate Reset Option (Note 10) (23) 4
Equity earnings in unconsolidated entities (89) (75)
Distributions on earnings from unconsolidated entities 98 101
Gain on investment in unconsolidated entities (Note 7) (267)  
Other 7 7
Changes in assets and liabilities 182 (4)
Net cash provided by operating activities 1,033 521
CASH FLOWS FROM INVESTING ACTIVITIES    
Investments in unconsolidated entities (125) (40)
Additions to property, equipment and other (280) (266)
Proceeds from sales of assets   83
Cash paid for purchases of linefill and base gas (16)  
Other investing activities (8) 2
Net cash used in investing activities (429) (221)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net repayments under commercial paper program (Note 8)   (8)
Net borrowings under senior unsecured revolving credit facility (Note 8)   350
Net repayments under senior secured hedged inventory facility (Note 8)   (498)
Other financing activities 57 63
Net cash used in financing activities (198) (311)
Effect of translation adjustment (3) (3)
Net increase/(decrease) in cash and cash equivalents and restricted cash 403 (14)
Cash and cash equivalents and restricted cash, beginning of period 66 37
Cash and cash equivalents and restricted cash, end of period 469 23
Cash paid for:    
Interest, net of amounts capitalized 70 76
Income taxes, net of amounts refunded 65 9
Series A Preferred Units    
CASH FLOWS FROM FINANCING ACTIVITIES    
Distributions paid to unitholders (Note 9) (37)  
Common Units    
CASH FLOWS FROM FINANCING ACTIVITIES    
Distributions paid to unitholders (Note 9) $ (218) $ (218)