Shareholders' Deficit - Summary of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning balance | $ (515.1) | |||||||||||
| Total other comprehensive (loss) income | $ (2.9) | $ (5.0) | (16.7) | $ 19.8 | ||||||||
| Ending balance | (409.6) | (409.6) | ||||||||||
| Foreign Currency Translation Adjustments [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning balance | (260.2) | (249.4) | (248.2) | (282.3) | ||||||||
| Other comprehensive (loss) income before reclassifications, net of tax | (7.7) | (0.7) | (19.7) | 32.2 | ||||||||
| Amounts reclassified from accumulated other comprehensive loss to income, net of tax | 0.0 | [1] | 0.0 | [1] | 0.0 | [2] | 0.0 | [2] | ||||
| Total other comprehensive (loss) income | (7.7) | (0.7) | (19.7) | 32.2 | ||||||||
| Ending balance | (267.9) | (250.1) | (267.9) | (250.1) | ||||||||
| Unrealized (Loss) Gain on Derivatives [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning balance | (5.1) | 2.8 | (3.3) | 10.9 | ||||||||
| Other comprehensive (loss) income before reclassifications, net of tax | 3.0 | (2.2) | (1.9) | (3.5) | ||||||||
| Amounts reclassified from accumulated other comprehensive loss to income, net of tax | 1.8 | [1] | (2.1) | [1] | 4.9 | [2] | (8.9) | [2] | ||||
| Total other comprehensive (loss) income | 4.8 | (4.3) | 3.0 | (12.4) | ||||||||
| Ending balance | (0.3) | (1.5) | (0.3) | (1.5) | ||||||||
| Accumulated Other Comprehensive Loss [Member] | ||||||||||||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | ||||||||||||
| Beginning balance | (265.3) | (246.6) | (251.5) | (271.4) | ||||||||
| Other comprehensive (loss) income before reclassifications, net of tax | (4.7) | (2.9) | (21.6) | 28.7 | ||||||||
| Amounts reclassified from accumulated other comprehensive loss to income, net of tax | 1.8 | [1] | (2.1) | [1] | 4.9 | [2] | (8.9) | [2] | ||||
| Total other comprehensive (loss) income | (2.9) | (5.0) | (16.7) | 19.8 | ||||||||
| Ending balance | $ (268.2) | $ (251.6) | $ (268.2) | $ (251.6) | ||||||||
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