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Net Income Per Class A Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Basic Net Income per Class A Share |  |  |  |
Net income attributable to PAGP | $ 24 | $ 42 | $ 65 | $ 78
Diluted Net Income per Class A Share |  |  |  |
Net income attributable to PAGP | 24 | 42 | 65 | 78
Incremental net income attributable to PAGP resulting from assumed exchange of AAP units and AAP Management Units |  | 52 |  | 111
Net income attributable to PAGP including incremental net income from assumed exchange of AAP units and AAP Management Units | $ 24 | $ 94 | $ 65 | $ 189
Class A Shares |  |  |  |
Basic Net Income per Class A Share |  |  |  |
Basic weighted average Class A shares outstanding (shares) | 153.0 | 100.0 | 136.0 | 98.0
Basic net income per Class A share (usd per share) | $ 0.16 | $ 0.41 | $ 0.47 | $ 0.80
Diluted Net Income per Class A Share |  |  |  |
Basic weighted average Class A shares outstanding (shares) | 153.0 | 100.0 | 136.0 | 98.0
Dilutive shares resulting from assumed exchange of AAP units and AAP Management Units (shares) |  | 134.0 |  | 147.0
Diluted weighted average Class A shares outstanding (shares) | 153.0 | 234.0 | 136.0 | 245.0
Diluted net income per Class A share (usd per share) | $ 0.16 | $ 0.40 | $ 0.47 | $ 0.77
Maximum |  |  |  |
Net Income Per Class A Share |  |  |  |
Dilutive LTIP awards (shares) | 0.1 | 0.1 | 0.1 | 0.1

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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=96948231&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1252-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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