Employee Benefit Plans (Net Periodic Costs) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]
Interest costs	$ 1	$ 1
Amortization of net actuarial loss	2	2
Net periodic costs	$ 3	$ 3