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Capital Stock -Common Shares Issued and Outstanding and Related Activity (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Schedule of Capitalization, Equity [Line Items] |  |  |
Issuance of Subco/ common shares in connection with the GIP Transaction |  | $ 5,904 |
Cancellation of treasury stock, common in connection with the GIP Transaction | $ 0 | $ (12,829) | $ 0
Common Stock [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Shares, beginning balance | 155,318,170 | 172,075,373 | 172,075,373
Shares/ Subco units repurchased | 0 | 0 | 0
Net issuance of common shares related to employee stock transactions | 713,879 | 456,182 | 0
Issuance of Subco/ common shares in connection with the GIP Transaction | $ 244,240 | $ 6,908,416 |
Cancellation of treasury stock, common in connection with the GIP Transaction |  | $ (24,121,801) |
Shares, ending balance | 156,276,289 | 155,318,170 | 172,075,373
Common Stock [Member] | Shares Outstanding [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Shares, beginning balance | 154,947,813 | 148,500,074 | 149,756,492
Shares/ Subco units repurchased | (872,569) | (1,909,964) | (2,176,538)
Net issuance of common shares related to employee stock transactions | 749,687 | 1,449,287 | 920,120
Issuance of Subco/ common shares in connection with the GIP Transaction |  | $ 6,908,416 |
Cancellation of treasury stock, common in connection with the GIP Transaction |  | $ 0 |
Shares, ending balance | 155,069,171 | 154,947,813 | 148,500,074
Treasury Stock, Common [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Shares, beginning balance | (370,357) | (23,575,299) | (22,318,881)
Shares/ Subco units repurchased | (872,569) | (1,909,964) | (2,176,538)
Net issuance of common shares related to employee stock transactions | 35,808 | 993,105 | 920,120
Issuance of Subco/ common shares in connection with the GIP Transaction | $ 0 | $ 0 |
Cancellation of treasury stock, common in connection with the GIP Transaction |  | $ 24,121,801 |
Shares, ending balance | (1,207,118) | (370,357) | (23,575,299)
Subco Units [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Shares, beginning balance | 0 | 0 | 0
Shares/ Subco units repurchased | (705,118) | 0 | 0
Net issuance of common shares related to employee stock transactions | 0 | 0 | 0
Issuance of Subco/ common shares in connection with the GIP Transaction | $ 8,448,427 | $ 0 |
Cancellation of treasury stock, common in connection with the GIP Transaction |  | $ 0 |
Shares, ending balance | 7,743,309 | 0 | 0
Subco Units [Member] | Shares Outstanding [Member] |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |
Shares, beginning balance | 0 | 0 | 0
Shares/ Subco units repurchased | (705,118) | 0 | 0
Net issuance of common shares related to employee stock transactions |  | 0 | 0
Issuance of Subco/ common shares in connection with the GIP Transaction | $ 8,448,427 | $ 0 |
Cancellation of treasury stock, common in connection with the GIP Transaction |  | $ 0 |
Shares, ending balance | 7,743,309 | 0 | 0

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