Employee Benefit Plans (Net Periodic Costs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]
Interest costs	$ 2.5	$ 1.5
Amortization of net actuarial loss	0.5	1.5
Amortization of prior service cost	0.0	0.1
Net periodic costs	$ 3.0	$ 3.1