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Derivative Financial Instruments - Summary of Outstanding Foreign Exchange Derivatives Designated as Net Investment Hedges of Foreign Currency Risk (Detail) - Designated Hedges - Net Investment Hedges € in Thousands, £ in Thousands, kr in Thousands, SFr in Thousands, $ in Thousands, $ in Thousands | Sep. 30, 2025 SEK (kr) derivative_instrument | Sep. 30, 2025 GBP (£) derivative_instrument | Sep. 30, 2025 EUR (€) derivative_instrument | Sep. 30, 2025 AUD ($) derivative_instrument | Sep. 30, 2025 CAD ($) derivative_instrument | Sep. 30, 2025 CHF (SFr) derivative_instrument | Dec. 31, 2024 SEK (kr) derivative_instrument | Dec. 31, 2024 GBP (£) derivative_instrument | Dec. 31, 2024 EUR (€) derivative_instrument | Dec. 31, 2024 AUD ($) derivative_instrument | Dec. 31, 2024 CHF (SFr) derivative_instrument
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Buy USD / Sell SEK Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2
Notional amount | kr | kr 970,798 |  |  |  |  |  | kr 971,180 |  |  |  |
Buy USD / Sell GBP Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 7 | 7 | 7 | 7 | 7 | 7 | 5 | 5 | 5 | 5 | 5
Notional amount | £ |  | £ 700,195 |  |  |  |  |  | £ 604,739 |  |  |
Buy USD / Sell EUR Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8
Notional amount | € |  |  | € 657,309 |  |  |  |  |  | € 603,910 |  |
Buy USD / Sell AUD Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 8 | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 6 | 6
Notional amount | $ |  |  |  | $ 383,504 |  |  |  |  |  | $ 355,703 |
Buy USD / Sell CAD Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 3 | 3 | 3 | 3 | 3 | 3 |  |  |  |  |
Notional amount | $ |  |  |  |  | $ 120,877 |  |  |  |  |  |
Buy USD / Sell CHF Forward |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of instruments | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1
Notional amount | SFr |  |  |  |  |  | SFr 52 |  |  |  |  | SFr 6,752

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