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	$ 858	$ 730	$ 906
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	626	494	432
Equity-indexed compensation expense	41	60	27
Inventory valuation adjustments (Note 4)	35	3	117
Deferred income tax expense/(benefit)	16	(60)	16
Settlement of terminated interest rate hedging instruments	(29)	(29)	(48)
Change in fair value of Preferred Distribution Rate Reset Option (Note 12)	(13)	(30)
Equity earnings in unconsolidated entities	(290)	(195)	(183)
Distributions from unconsolidated entities	304	216	214
Other	10	23	(21)
Changes in assets and liabilities, net of acquisitions:
Trade accounts receivable and other	(511)	(524)	803
Inventory	605	(463)	(90)
Accounts payable and other current liabilities	847	508	(815)
Net cash provided by operating activities	2,499	733	1,358
CASH FLOWS FROM INVESTING ACTIVITIES
Cash paid in connection with acquisitions, net of cash acquired (Note 6)	(1,280)	(282)	(105)
Investments in unconsolidated entities (Note 8)	(416)	(301)	(253)
Additions to property, equipment and other	(1,024)	(1,334)	(2,079)
Proceeds from sales of assets (Note 6)	1,083	654	5
Return of investment from unconsolidated entities (Note 8)	21
Cash received from sales of linefill and base gas	49		1
Cash paid for purchases of linefill and base gas	(2)	(7)	(133)
Other investing activities	(1)	(3)	34
Net cash used in investing activities	(1,570)	(1,273)	(2,530)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings/(repayments) under commercial paper program (Note 10)	(690)	(564)	631
Net borrowings under senior secured hedged inventory facility (Note 10)	36	447	300
Repayment under AAP senior secured revolving credit facility (Note 10)		(92)
Repayment of AAP term loan (Note 10)		(550)
Proceeds from the issuance of senior notes (Note 10)		748	998
Repayments of senior notes (Note 10)	(1,350)	(175)	(549)
Net proceeds from the sale of Series A preferred units (Note 11)		1,569
Net proceeds from the sale of Series B preferred units (Note 11)	788
Net proceeds from the sale of common units (Note 11)	1,664	796	1,099
Contributions from general partner		42	23
Distributions paid to common unitholders (Note 11)	(1,386)	(1,062)	(1,081)
Distributions paid to general partner (Note 11)		(565)	(590)
Other financing activities	(5)	(38)	(31)
Net cash provided by/(used in) financing activities	(943)	556	800
Effect of translation adjustment on cash	4	4	(4)
Net increase/(decrease) in cash and cash equivalents	(10)	20	(376)
Cash and cash equivalents, beginning of period	47	27	403
Cash and cash equivalents, end of period	37	47	27
Cash paid for:
Interest, net of amounts capitalized	486	450	396
Income taxes, net of amounts refunded	$ 50	$ 98	$ 50