Employee Benefit Plans (Net Periodic Benefit Costs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest costs	$ 2.4	$ 2.5
Amortization of net actuarial loss	0.6	0.5
Net periodic costs	$ 3.0	$ 3.0