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Net Income Per Class A Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Calculation of basic and diluted net income/(loss) per Class A share | The following table sets forth the computation of basic and diluted net income/(loss) per Class A share (in millions, except per share data):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Basic Net Income/(Loss) per Class A Share |  |  |  |  |  |  |
Net income/(loss) attributable to PAGP | $ | 16 |  |  | $ | 66 |  |  | $ | (565) |  |  | $ | 213 |
Basic weighted average Class A shares outstanding | 184 |  |  | 162 |  |  | 183 |  |  | 161 |
Basic net income/(loss) per Class A share | $ | 0.09 |  |  | $ | 0.41 |  |  | $ | (3.08) |  |  | $ | 1.32 |
Diluted Net Income/(Loss) per Class A Share |  |  |  |  |  |  |
Net income/(loss) attributable to PAGP | $ | 16 |  |  | $ | 66 |  |  | $ | (565) |  |  | $ | 213 |
Incremental net income attributable to PAGP resulting from assumed exchange of AAP Management Units | — |  |  | — |  |  | — |  |  | — |
Net income/(loss) attributable to PAGP including incremental net income from assumed exchange of AAP Management Units | $ | 16 |  |  | $ | 66 |  |  | $ | (565) |  |  | $ | 213 |
Basic weighted average Class A shares outstanding | 184 |  |  | 162 |  |  | 183 |  |  | 161 |
Dilutive shares resulting from assumed exchange of AAP Management Units | — |  |  | 2 |  |  | — |  |  | — |
Diluted weighted average Class A shares outstanding | 184 |  |  | 164 |  |  | 183 |  |  | 161 |
Diluted net income/(loss) per Class A share | $ | 0.09 |  |  | $ | 0.40 |  |  | $ | (3.08) |  |  | $ | 1.32 |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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