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Financial Instruments and Fair Value Measurements - Foreign Currency Contracts Activity (Detail) - Forwards [Member] - Net Investment Hedges [Member] - Designated As Hedging Instrument [Member] | 3 Months Ended
--- | ---
Mar. 31, 2026 USD ($) Derivative | Mar. 31, 2025 USD ($) Derivative
Derivative [Line Items] |  |
Notional amounts at January 1 | $ 883,000,000 | $ 595,000,000
New contracts | 125,000,000 | 0
Matured, expired or settled contracts | (125,000,000) | (163,000,000)
Notional amounts at March 31 | 883,000,000 | 432,000,000
CAD |  |
Derivative [Line Items] |  |
Notional amounts at January 1 | 200,000,000 | 163,000,000
New contracts | 0 | 0
Matured, expired or settled contracts | 0 | (163,000,000)
Notional amounts at March 31 | $ 200,000,000 | $ 0
Weighted average forward rate at March 31 | 1.36 | 0
Active contracts at March 31 | Derivative | 2 | 0
GBP |  |
Derivative [Line Items] |  |
Notional amounts at January 1 | $ 683,000,000 | $ 432,000,000
New contracts | 125,000,000 | 0
Matured, expired or settled contracts | (125,000,000) | 0
Notional amounts at March 31 | $ 683,000,000 | $ 432,000,000
Weighted average forward rate at March 31 | 1.34 | 1.26
Active contracts at March 31 | Derivative | 6 | 4

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