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Fair Value Measurement - Summary of Fair Value of Financial Liabilities Measured Using Level 3 Inputs (Detail) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value at the beginning of the period | $ (401) | $ (477)
Bifurcated embedded derivatives |  |
Fair value at the end of the period | (198) | (552)
Nove Tide Acquisition [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Adjustments to provisions for contingent consideration | (1) | (1)
Settlement of contingent consideration | 2 | 2
Allergan transaction [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Adjustments to provisions for contingent consideration | (25) | (267)
Settlement of contingent consideration | 212 | 227
Eagle Transaction [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Adjustments to provisions for contingent consideration | (20) | (37)
Settlement of contingent consideration | $ 35 | 41
Redemption Of Convertible Debt Security [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Redemption of convertible bond security |  | $ (40)

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