Business Combinations and Asset Acquisitions - Summary of Changes in Contingent Consideration Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Changes In Contingent Consideration Measured At Fair Value On A Recurring Basis [Roll Forward] | |||
| Opening balance | $ 14.0 | $ 24.4 | $ 39.8 |
| Acquisitions | 14.0 | 3.6 | 5.6 |
| Fair value losses (gains) included in net loss | 2.6 | (2.2) | (4.7) |
| Payments | (9.7) | (11.8) | (16.3) |
| Closing balance | $ 20.9 | $ 14.0 | $ 24.4 |