CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
REVENUES
Supply and Logistics segment revenues	$ 5,632	$ 11,346
Transportation segment revenues	185	181
Facilities segment revenues	125	157
Total revenues	5,942	11,684
COSTS AND EXPENSES
Purchases and related costs	5,042	10,670
Field operating costs	346	336
General and administrative expenses	79	90
Depreciation and amortization	108	96
Total costs and expenses	5,575	11,192
OPERATING INCOME	367	492
OTHER INCOME/(EXPENSE)
Equity earnings in unconsolidated entities	37	20
Interest expense (net of capitalized interest of $14 and $11, respectively)	(104)	(81)
Other expense, net	(4)	(2)
INCOME BEFORE TAX	296	429
Current income tax expense	(42)	(36)
Deferred income tax benefit/(expense)	8	(21)
NET INCOME	262	372
Net income attributable to noncontrolling interests	(231)	(358)
NET INCOME ATTRIBUTABLE TO PAGP	$ 31	$ 14
BASIC AND DILUTED NET INCOME PER CLASS A SHARE	$ 0.14	$ 0.11
BASIC AND DILUTED WEIGHTED AVERAGE CLASS A SHARES OUTSTANDING	212	135