Employee Benefit Plans (Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2	$ 2
Interest cost	8	5
Expected return on assets	(8)	(12)
Amortization of actuarial losses	3	0
Net periodic benefit cost (credit)	5	(5)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	2	2
Expected return on assets	0	0
Amortization of actuarial losses	(1)	0
Net periodic benefit cost (credit)	$ 1	$ 2