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Net Income Per Class A Share (Tables) | 6 Months Ended
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Jun. 30, 2026
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted Net Income per Common Unit | 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,
| 2026 |  | 2025 |  | 2026 |  | 2025
Basic Net Income per Class A Share |  |  |  |  |  |  |
Net income/(loss) attributable to PAGP from continuing operations | $ | (74) |  |  | $ | 10 |  |  | $ | (26) |  |  | $ | 56 |
Net income attributable to PAGP from discontinued operations | $ | 463 |  |  | $ | 20 |  |  | $ | 434 |  |  | $ | 58 |
Basic weighted average Class A shares outstanding | 198 |  |  | 198 |  |  | 198 |  |  | 198 |
Basic Net Income/(Loss) per Class A Share: |  |  |  |  |  |  |
Continuing operations | $ | (0.37) |  |  | $ | 0.05 |  |  | $ | (0.13) |  |  | $ | 0.29 |
Discontinued operations | 2.34 |  |  | 0.10 |  |  | 2.19 |  |  | 0.29 |
Basic net income per Class A share | $ | 1.97 |  |  | $ | 0.15 |  |  | $ | 2.06 |  |  | $ | 0.58 |
Diluted Net Income per Class A Share |  |  |  |  |  |  |
Net income/(loss) attributable to PAGP from continuing operations | $ | (74) |  |  | $ | 10 |  |  | $ | (26) |  |  | $ | 56 |
Net income attributable to PAGP from discontinued operations | $ | 463 |  |  | $ | 20 |  |  | $ | 434 |  |  | $ | 58 |
Incremental net income attributable to PAGP resulting from assumed exchange of AAP Management Units | — |  |  | — |  |  | — |  |  | 8 |
Net income attributable to PAGP from discontinued operations including incremental net income from assumed exchange of AAP Management Units | $ | 463 |  |  | $ | 20 |  |  | $ | 434 |  |  | $ | 66 |
Basic weighted average Class A shares outstanding | 198 |  |  | 198 |  |  | 198 |  |  | 198 |
Dilutive shares resulting from assumed exchange of AAP Management Units | — |  |  | — |  |  | — |  |  | 35 |
Diluted weighted average Class A shares outstanding | 198 |  |  | 198 |  |  | 198 |  |  | 233 |
Diluted Net Income/(Loss) per Class A Share: |  |  |  |  |  |  |
Continuing operations | $ | (0.37) |  |  | $ | 0.05 |  |  | $ | (0.13) |  |  | $ | 0.29 |
Discontinued operations | 2.34 |  |  | 0.10 |  |  | 2.19 |  |  | 0.28 |
Diluted net income per Class A share | $ | 1.97 |  |  | $ | 0.15 |  |  | $ | 2.06 |  |  | $ | 0.57 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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