Quarterly report [Sections 13 or 15(d)]

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

v3.25.1
Shareholders' Deficit - Summary of Changes in Shareholders' Deficit (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Beginning balance $ (801.1) $ (1,060.3)
Issuance of common shares from exercise of SARs, restricted stock units, employee stock purchase plan, and other 0.3 0.7
Additional capital from share-based compensation 11.6 11.9
Repurchases of common shares (2.2) (2.3)
Net income 50.4 24.3
Foreign currency translation adjustment, net of income taxes 8.7 (9.9)
Unrealized loss on derivatives, net of income taxes (3.7) (1.0)
Ending balance (736.0) (1,036.6)
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 278.2 233.9
Issuance of common shares from exercise of SARs, restricted stock units, employee stock purchase plan, and other 0.3 0.7
Additional capital from share-based compensation 11.6 11.9
Repurchases of common shares (2.2) (2.3)
Ending balance 287.9 244.2
Accumulated Other Comprehensive Loss [Member]    
Beginning balance (271.4) (232.0)
Foreign currency translation adjustment, net of income taxes 8.7 (9.9)
Unrealized loss on derivatives, net of income taxes (3.7) (1.0)
Ending balance (266.4) (242.9)
Accumulated Deficit [Member]    
Beginning balance (808.0) (1,062.3)
Repurchases of common shares 0.0 0.0
Net income 50.4 24.3
Ending balance $ (757.6) $ (1,038.0)