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v3.25.1

Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions | Apr. 01, 2025 | Mar. 26, 2025 | Mar. 14, 2023 | Jan. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Subordinated liabilities |  |  |  |  | $ 1,986 | $ 1,986
Subordinated Notes [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Percentage of issuance on subordinated note |  |  | 9.125% |  |  |
9.125% Subordinated Notes [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Redemption date | Apr. 10, 2025 |  |  |  |  |
Non adjusting event [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Percentage of issuance on subordinated note | 9.125% |  |  |  |  |
Redemption Of Subordinated Liabilities | $ 1,039 |  |  |  |  |
Redemption Of Subordinated Liabilities Premium Percentage | 1.00% |  |  |  |  |
Subordinated liabilities | $ 1,000 |  |  |  |  |
Dividend Declared [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Dividends proposed or declared before financial statements authorized for issue but not recognized as distribution to owners |  | $ 130 |  |  |  |
Maximum Amount Authorized For Share Repurchase [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Maximum amount authorized for share repurchase |  | $ 500 |  |  |  |
Business Valuation [Member] |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |
Business Valuation of an Operation |  |  |  | $ 928 |  |

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