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Other Assets - Identifiable Intangible Assets by Type (Detail) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Other Assets [Abstract] |  |
Gross carrying value | $ 2,323 | $ 2,269
Accumulated amortization | (1,459) | (1,422)
Net carrying value | $ 864 | $ 847

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