Net Income Per Class A Share (Tables)

9 Months Ended

Sep. 30, 2017

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,
	2017		2016		2017		2016
Basic Net Income per Class A Share
Net income attributable to PAGP	$	4	$	24	$	69	$	102
Basic weighted average Class A shares outstanding	154		101		142		99
Basic net income per Class A share	$	0.03	$	0.24	$	0.49	$	1.03
Diluted Net Income per Class A Share
Net income attributable to PAGP	$	4	$	24	$	69	$	102
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	$	4	$	24	$	69	$	240
Basic weighted average Class A shares outstanding	154		101		142		99
Dilutive shares resulting from assumed exchange of AAP units and AAP Management Units	—		—		—		137
Diluted weighted average Class A shares outstanding	154		101		142		236
Diluted net income per Class A share	$	0.03	$	0.24	$	0.49	$	1.02