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Net Income Per Class A Share (Tables) | 6 Months Ended
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Jun. 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 June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Basic Net Income per Class A Share |  |  |  |  |  |  |  |  |  |  |
Net income attributable to PAGP | $ | 24 |  |  | $ | 42 |  |  | $ | 65 |  |  | $ | 78 |
Basic weighted average Class A shares outstanding | 153 |  |  | 100 |  |  | 136 |  |  | 98 |
Basic net income per Class A share | $ | 0.16 |  |  | $ | 0.41 |  |  | $ | 0.47 |  |  | $ | 0.80 |
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 |
Basic weighted average Class A shares outstanding | 153 |  |  | 100 |  |  | 136 |  |  | 98 |
Dilutive shares resulting from assumed exchange of AAP units and AAP Management Units | — |  |  | 134 |  |  | — |  |  | 147 |
Diluted weighted average Class A shares outstanding | 153 |  |  | 234 |  |  | 136 |  |  | 245 |
Diluted net income per Class A share | $ | 0.16 |  |  | $ | 0.40 |  |  | $ | 0.47 |  |  | $ | 0.77 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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 + Details
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