Net Income Per Class A Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Calculation of basic and diluted net income per Class A share

The following table sets forth the computation of basic and diluted net income per Class A share (in millions, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Basic Net Income per Class A Share
Net income attributable to PAGP	$	24	$	32	$	102	$	93
Basic weighted average Class A shares outstanding	268		225		263		220
Basic net income per Class A share	$	0.09	$	0.14	$	0.39	$	0.42
Diluted Net Income per Class A Share
Net income attributable to PAGP	$	24	$	32	$	102	$	93
Incremental net income attributable to PAGP resulting from assumed exchange of AAP units and AAP Management Units	—		—		138		—
Net income attributable to PAGP including incremental net income from assumed exchange of AAP units and AAP Management Units	$	24	$	32	$	240	$	93
Basic weighted average Class A shares outstanding	268		225		263		220
Dilutive shares resulting from assumed exchange of AAP units and AAP Management Units	—		—		366		—
Diluted weighted average Class A shares outstanding	268		225		629		220
Diluted net income per Class A share	$	0.09	$	0.14	$	0.38	$	0.42