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Consolidated Statements Of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 2,366 $ 0 [1],[2] $ 1,061 [2]
Reconciliation of net income to net cash provided by operating activities:      
Income (loss) from discontinued operations, net of income taxes 177 462 [2] (38) [2]
Depreciation, depletion and amortization 2,554 2,216 [2] 1,951 [2]
Deferred income taxes (1,871) (177) [2] 239 [2]
Amortization included in interest expense 24 3 [2] (21) [2]
Unit-based compensation expense 99 70 [2] 91 [2]
Impairment losses 1,039 1,040 [2] 339 [2]
Gains on acquisitions 0 (83) [2] 0 [2]
Losses on extinguishments of debt 89 0 [2] 43 [2]
Impairment of investments in unconsolidated affiliates 313 308 [2] 0 [2]
Losses on disposal of assets 0 0 [2] (6) [2]
Equity in earnings of unconsolidated affiliates (144) (270) [2] (276) [2]
Distributions from unconsolidated affiliates 297 268 [2] 409 [2]
Inventory valuation adjustments (24) (97) [2] 67 [2]
Other non-cash (298) (239) [2] (8) [2]
Net change in operating assets and liabilities, net of effects of acquisitions and deconsolidations (192) (179) [2] (872) [2]
Net cash provided by operating activities 4,429 3,322 [2] 2,979 [2]
INVESTING ACTIVITIES:      
Proceeds from sale of noncontrolling interest 0 0 [2] 64 [2]
Cash paid for acquisitions, net of cash received (303) (1,398) [2] (777) [2]
Cash paid for acquisition of a noncontrolling interest 0 0 [2] (129) [2]
Capital expenditures, excluding allowance for equity funds used during construction (8,444) (7,771) [2] (9,073) [2]
Contributions in aid of construction costs 31 71 [2] 80 [2]
Contributions to unconsolidated affiliates (268) (68) [2] (45) [2]
Distributions from unconsolidated affiliates in excess of cumulative earnings 135 135 [2] 128 [2]
Proceeds from the sale of other assets 48 35 [2] 14 [2]
Change in restricted cash 0 14 [2] 19 [2]
Other (3) 0 [2] (16) [2]
Net cash used in investing activities (5,606) (8,982) [2] (9,735) [2]
FINANCING ACTIVITIES:      
Proceeds from borrowings 31,608 25,785 [2] 26,455 [2]
Repayments of long-term debt (31,268) (19,076) [2] (19,828) [2]
Cash received from affiliate notes 0 5,317 [2] 0 [2]
Cash paid on affiliate notes (255) (5,051) [2] 0 [2]
Proceeds from Issuance of Common Limited Partners Units 568 0 [2] 0 [2]
Subsidiary units issued for cash 3,235 2,559 [2] 3,889 [2]
Distributions to partners (1,010) (1,022) [2] (1,090) [2]
Distributions to noncontrolling interests (2,961) (2,766) [2] (2,335) [2]
Debt issuance costs (131) (52) [2] (75) [2]
Capital contributions from noncontrolling interest (988) 0 (34)
Capital contributions from noncontrolling interest 1,214 236 [2] 841 [2]
Units repurchased under buyback program 0 0 [2] 1,064 [2]
Other, net 6 (3) [2] (8) [2]
Net cash provided by financing activities 953 5,927 [2] 6,785 [2]
Cash Provided by (Used in) Operating Activities, Discontinued Operations 136 93 [2] 90 [2]
Cash Provided by (Used in) Investing Activities, Discontinued Operations (38) (483) [2] (360) [2]
Increase (Decrease) in Assets Held-for-sale (5) 5 [2] (13) [2]
Net increase (decrease) in cash and cash equivalents of discontinued operations 93 (385) [2] (283) [2]
Decrease in cash and cash equivalents (131) (118) [2] (254) [2]
Cash and cash equivalents, beginning of period [2] 467 585 839
Cash and cash equivalents, end of period 336 467 [2] 585 [2]
Bakken Pipeline [Member]      
INVESTING ACTIVITIES:      
Proceeds from Divestiture of Interest in Joint Venture 2,000 0 [2] 0 [2]
Rover Pipeline LLC [Member]      
INVESTING ACTIVITIES:      
Proceeds from Divestiture of Interest in Joint Venture 1,478 0 [2] 0 [2]
PennTex [Member]      
INVESTING ACTIVITIES:      
Cash paid for acquisitions, net of cash received 280 0 [2] 0 [2]
ETP Series A Preferred Units [Member]      
FINANCING ACTIVITIES:      
Units repurchased under buyback program $ (53) $ 0 [2] $ 0 [2]
[1] * As adjusted. See Note 2 and Note 3.
[2] * As adjusted. See Note 2.