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Financial Instruments and Fair Value Measurements - Summary of Debt and Accrued Interest, Designated as Hedge (Detail) - Designated As Hedging Instrument [Member] - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
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British Pound Sterling Senior Notes [Member] |  |
Derivatives Fair Value [Line Items] |  |
Senior Notes Outstanding | $ 1,883 | $ 1,837
Canadian Dollar Senior Notes [Member] |  |
Derivatives Fair Value [Line Items] |  |
Senior Notes Outstanding | 1,822 | 1,793
Chinese Renminbi Senior Notes [Member] |  |
Derivatives Fair Value [Line Items] |  |
Senior Notes Outstanding | $ 98 | $ 0

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