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Employee Benefit Plans (Net Periodic Benefit Costs) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service costs $ 0.0 $ 0.0 $ 0.1 $ 0.1
Interest costs 2.4 2.4 7.1 7.2
Amortization of net actuarial loss 0.5 0.6 1.4 1.7
Net periodic costs $ 2.9 $ 3.0 $ 8.6 $ 9.0