Capital - Additional Information (Detail) $ / shares in Units, $ in Millions |
1 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
May 04, 2026
USD ($)
$ / shares
shares
|
Jul. 31, 2026
USD ($)
shares
|
Feb. 28, 2026
USD ($)
shares
|
Oct. 31, 2025
shares
|
Jun. 30, 2026
USD ($)
shares
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2026
USD ($)
shares
|
Jun. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
|
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| Disclosure Of Share Capital [Line Items] | |||||||||||||||
| Shares repurchased | shares | 6,500,000 | 1,100,000 | 3,600,000 | ||||||||||||
| Share redemption ratio | 0.98456 | ||||||||||||||
| Decrease through other distributions to owners, equity | $ 605 | $ 607 | |||||||||||||
| Cash distribution to shareholders | $ / shares | $ 1.435518 | ||||||||||||||
| Share repurchases | $ 100 | $ 0 | 362 | $ 0 | |||||||||||
| Excise taxes payable | 11 | 11 | |||||||||||||
| Other financial liabilities | [2] | 318 | [1] | 318 | [1] | $ 108 | |||||||||
| NCIB [member] | |||||||||||||||
| Disclosure Of Share Capital [Line Items] | |||||||||||||||
| Shares repurchased | shares | 6,000,000 | ||||||||||||||
| NCIB [member] | Share Repurchases Transactions [Member] | |||||||||||||||
| Disclosure Of Share Capital [Line Items] | |||||||||||||||
| Potential repurchase of common shares | shares | 2,600,000 | 16,000,000 | |||||||||||||
| Common shares repurchased, maximum value | $ 600 | $ 600 | |||||||||||||
| Pre-defined share repurchase program with broker [member] | |||||||||||||||
| Disclosure Of Share Capital [Line Items] | |||||||||||||||
| Other financial liabilities | $ 238 | $ 238 | |||||||||||||
| Pre-defined share repurchase program with broker [member] | Share Repurchases Transactions [Member] | |||||||||||||||
| Disclosure Of Share Capital [Line Items] | |||||||||||||||
| Repurchased common shares | shares | 238,000,000 | ||||||||||||||
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