v3.26.3
Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Contribution margin        
Total contribution margin [1] $ 570.6 $ 538.8 $ 1,699.4 $ 1,598.2
General and administrative expenses 432.1 413.0 1,299.7 1,221.8
Other operating income 0.0 0.0 (5.5) (4.8)
Interest expense, net 31.9 51.0 116.1 156.6
Other expense, net 0.0 0.0 94.6 0.0
Income before income taxes 106.6 74.8 194.5 224.6
Income taxes 49.5 31.7 102.7 81.9
Net income 57.1 43.1 91.8 142.7
Primary Reporting Segment [Member]        
Contribution margin        
Total contribution margin [1] 550.2 510.6 1,637.4 1,518.1
China [Member]        
Contribution margin        
Total contribution margin [1] 20.4 28.2 62.0 80.1
Other operating income $ 0.0 $ 0.0 $ (5.5) $ (4.8)
[1] Contribution margin consists of net sales less cost of sales and selling expenses.