CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES
Total revenues	$ 8,792	$ 5,873	$ 25,269	$ 18,618
COSTS AND EXPENSES
Purchases and related costs	7,768	5,327	22,838	16,239
Field operating costs	326	283	931	876
General and administrative expenses	74	68	232	210
Depreciation and amortization	131	151	306	401
Total costs and expenses	8,299	5,829	24,307	17,726
OPERATING INCOME	493	44	962	892
OTHER INCOME/(EXPENSE)
Equity earnings in unconsolidated entities	110	80	281	201
Gain on sale of investment in unconsolidated entities	210		210
Interest expense (net of capitalized interest of $8, $11, $21 and $26, respectively)	(110)	(134)	(327)	(390)
Other income/(expense), net	(3)	(1)	8	(6)
INCOME/(LOSS) BEFORE TAX	700	(11)	1,134	697
Current income tax (expense)/benefit	(14)	1	(34)	(9)
Deferred income tax (expense)/benefit	24	44	(1)	(21)
NET INCOME	710	34	1,099	667
Net income attributable to noncontrolling interests		(1)		(2)
NET INCOME ATTRIBUTABLE TO PAA	710	33	1,099	665
NET INCOME/(LOSS) PER COMMON UNIT (NOTE 4):
Net income/(loss) allocated to common unitholders — Basic	658	(8)	946	547
Net income/(loss) allocated to common unitholders — Diluted	$ 697	$ (8)	$ 947	$ 547
Common Units
NET INCOME/(LOSS) PER COMMON UNIT (NOTE 4):
Basic weighted average common units outstanding (units)	726	725	726	714
Basic net income/(loss) per common unit (usd per unit)	$ 0.91	$ (0.01)	$ 1.30	$ 0.77
Diluted weighted average common units outstanding (units)	799	725	728	715
Diluted net income/(loss) per common unit (usd per unit)	$ 0.87	$ (0.01)	$ 1.30	$ 0.76
Supply and Logistics
REVENUES
Total revenues	$ 8,482	$ 5,573	$ 24,374	$ 17,749
Transportation
REVENUES
Total revenues	161	160	458	459
OTHER INCOME/(EXPENSE)
Equity earnings in unconsolidated entities	110	80	281	201
Facilities
REVENUES
Total revenues	$ 149	$ 140	$ 437	$ 410