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Summary of Significant Accounting Policies - Summary of Activity of the Allowance For Credit Losses For Accounts Receivable (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accounts Receivable Additional Disclosures [Abstract]    
Opening balance $ 8.1 $ 2.7
Allowances 1.7 6.9
Net write-offs and other (2.7) (1.5)
Closing balance $ 7.1 $ 8.1