v3.25.3
Goodwill And Intangible Assets (Changes To Intangible Assets) (Detail) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Roll Forward]    
Balance at beginning of period, net of accumulated amortization $ 159.9 $ 87.1
Additions 0.0 92.4
Amortization expense (10.7) (17.6)
Currency translation and other 3.5 (2.0)
Balance at end of period, net of accumulated amortization $ 152.7 $ 159.9