Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail)

v3.23.1
Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Beginning balance $ (1,265.9) $ (1,391.5)  
Issuance of common shares from exercise of stock options, SARs, restricted stock units, employee stock purchase plan, and other 0.5 1.1  
Additional capital from share-based compensation 10.8 12.4  
Repurchases of common shares (8.7) (116.2)  
Net income 29.3 98.2  
Foreign currency translation adjustment, net of income taxes 13.2 4.4  
Unrealized gain/loss on derivatives, net of income taxes (2.0) (2.6)  
Accumulated deficit (1,175.2) (59.1) $ (1,204.5)
Ending balance (1,222.8) (1,453.3)  
Common Shares [Member]      
Beginning balance 0.1 0.1  
Issuance of common shares from exercise of stock options, SARs, restricted stock units, employee stock purchase plan, and other 0.0 0.0  
Repurchases of common shares 0.0 0.0  
Ending balance 0.1 0.1  
Treasury Stock [Member]      
Beginning balance   (328.9)  
Ending balance   (328.9)  
Paid-in Capital in Excess of par Value [Member]      
Beginning balance 188.7 318.1  
Issuance of common shares from exercise of stock options, SARs, restricted stock units, employee stock purchase plan, and other 0.5 1.1  
Additional capital from share-based compensation 10.8 12.4  
Repurchases of common shares (8.7) (21.9)  
Ending balance 191.3 173.0  
Paid-in Capital in Excess of par Value [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Accumulated deficit   (136.7)  
Accumulated Other Comprehensive Loss [Member]      
Beginning balance (250.2) (211.8)  
Foreign currency translation adjustment, net of income taxes 13.2 4.4  
Unrealized gain/loss on derivatives, net of income taxes (2.0) (2.6)  
Ending balance (239.0) (210.0)  
Accumulated Deficit [Member]      
Beginning balance (1,204.5) (1,169.0)  
Repurchases of common shares   (94.3)  
Net income 29.3 98.2  
Ending balance $ (1,175.2) (1,087.5)  
Accumulated Deficit [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Accumulated deficit   $ 77.6