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Income Taxes - Reconciliation of Liability for Uncertain Tax Positions (Detail)
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Balance at the beginning of the year $ 147.0
Additions for tax positions 7.1
Reductions for tax positions 0.0
Balance at the end of the year $ 154.1