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Consolidated Statements Of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 41 $ 1,093 $ 1,124
Reconciliation of net income to net cash provided by operating activities:      
Income (loss) from discontinued operations, net of income taxes 479 (81) (130)
Depreciation, depletion and amortization 2,166 1,904 1,669
Deferred income taxes (225) 221 (4)
Amortization included in interest expense 3 (21) (51)
Unit-based compensation expense 70 91 82
Impairment losses 970 339 370
Gains on acquisitions (83) 0 0
Gain on sale of AmeriGas common units 0 0 (177)
Losses on extinguishments of debt 0 43 25
Impairment of investment in an unconsolidated affiliate 308 0 0
(Gains) losses on disposal of assets 2 (6) 0
Equity in earnings of unconsolidated affiliates (270) (276) (332)
Distributions from unconsolidated affiliates 268 409 291
Inventory valuation adjustments (267) 229 445
Other non-cash (229) (8) (89)
Net change in operating assets and liabilities, net of effects of acquisitions and deconsolidations 36 (1,032) (338)
Net cash provided by operating activities 3,269 2,905 2,885
INVESTING ACTIVITIES:      
Proceeds from sale of noncontrolling interest 0 64 0
Proceeds from the sale of AmeriGas common units 0 0 814
Cash paid for acquisitions, net of cash received (1,398) (777) (2,367)
Cash paid for acquisition of a noncontrolling interest 0 (129) 0
Capital expenditures, excluding allowance for equity funds used during construction (7,719) (9,021) (5,369)
Contributions in aid of construction costs 71 80 45
Contributions to unconsolidated affiliates (68) (45) (334)
Distributions from unconsolidated affiliates in excess of cumulative earnings 135 128 136
Proceeds from the sale of other assets 35 14 54
Change in restricted cash 14 19 172
Other 0 (16) (19)
Net cash used in investing activities (8,930) (9,683) (6,868)
FINANCING ACTIVITIES:      
Proceeds from borrowings 25,785 26,455 18,375
Repayments of long-term debt (19,076) (19,828) (13,886)
Cash received from affiliate notes 5,317 0 0
Cash paid on affiliate notes (5,051) 0 0
Subsidiary units issued for cash 2,559 3,889 3,057
Distributions to partners (1,022) (1,090) (821)
Distributions to noncontrolling interests (2,766) (2,335) (1,905)
Debt issuance costs (52) (75) (77)
Capital contributions from noncontrolling interest 0 (34) 0
Capital contributions from noncontrolling interest 236 841 139
Units repurchased under buyback program 0 (1,064) (1,000)
Other, net (3) (8) (5)
Net cash provided by financing activities 5,927 6,785 3,877
Cash Provided by (Used in) Operating Activities, Discontinued Operations 146 162 290
Cash Provided by (Used in) Investing Activities, Discontinued Operations (535) (410) 74
Increase (Decrease) in Assets Held-for-sale 5 (14) (1)
Net Cash Provided by (Used in) Discontinued Operations (384) (262) 363
Increase (decrease) in cash and cash equivalents (118) (255) 257
Cash and cash equivalents, beginning of period 581 836 579
Cash and cash equivalents, end of period $ 463 $ 581 $ 836