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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Taxes [Line Items]      
Income tax benefits due to NOL carryback provision $ (3.0) $ 16.8 $ 309.4
Tax credit carryforwards expiring year description   the Company continued to generate pre-tax losses and remained in a three-year cumulative pre-tax loss. Consistent with December 31, 2021, this is heavily weighted as objectively verifiable negative evidence. As a result, the Company is unable to include future projected earnings in assessing the recoverability of its deferred tax assets  
Deferred tax assets valuation allowance 326.1 $ 264.1  
Gross unrecognized tax benefits, including interest and penalties 64.3 62.5  
Unrecognized tax benefit that if recognized would impact effective tax rate 64.3 62.5  
Accrued for interest and penalties 8.5 6.6  
CUSA      
Income Taxes [Line Items]      
Income tax benefits due to NOL carryback provision 13.1 32.3 303.6
Deferred tax assets valuation allowance 283.2 240.9  
Gross unrecognized tax benefits, including interest and penalties 62.5 60.6  
Unrecognized tax benefit that if recognized would impact effective tax rate 62.5 60.6  
Accrued for interest and penalties 8.5 $ 6.6  
Foreign      
Income Taxes [Line Items]      
Accumulated undistributed earnings and profits 112.5    
Reinvestment of undistributed earnings of foreign subsidiaries 4.3    
One-time transition tax accumulated undistributed earnings and profits $ 159.3    
Tax credits carryforward period 10 years    
CARES Act      
Income Taxes [Line Items]      
Income tax benefits due to NOL carryback provision     187.5
CARES Act | CUSA      
Income Taxes [Line Items]      
Income tax benefits due to NOL carryback provision     $ (185.2)