Quarterly report pursuant to Section 13 or 15(d)

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

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Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Beginning balance $ (1,060.3) $ (1,265.9)
Issuance of common shares from exercise of SARs, restricted stock units, employee stock purchase plan, and other 0.7 0.5
Additional capital from share-based compensation 11.9 10.8
Repurchases of common shares (2.3) (8.7)
Net income 24.3 29.3
Foreign currency translation adjustment, net of income taxes (9.9) 13.2
Unrealized gain/loss on derivatives, net of income taxes (1.0) (2.0)
Ending balance (1,036.6) (1,222.8)
Common Shares [Member]    
Beginning balance 0.1 0.1
Issuance of common shares from exercise of 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
Paid-in Capital in Excess of par Value [Member]    
Beginning balance 233.9 188.7
Issuance of common shares from exercise of SARs, restricted stock units, employee stock purchase plan, and other 0.7 0.5
Additional capital from share-based compensation 11.9 10.8
Repurchases of common shares (2.3) (8.7)
Ending balance 244.2 191.3
Accumulated Other Comprehensive Loss [Member]    
Beginning balance (232.0) (250.2)
Foreign currency translation adjustment, net of income taxes (9.9) 13.2
Unrealized gain/loss on derivatives, net of income taxes (1.0) (2.0)
Ending balance (242.9) (239.0)
Accumulated Deficit [Member]    
Beginning balance (1,062.3) (1,204.5)
Repurchases of common shares 0.0 0.0
Net income 24.3 29.3
Ending balance $ (1,038.0) $ (1,175.2)