Pension - Components of Net Periodic Pension Benefit (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 1	$ 4	$ 2	$ 6
Interest cost	16	8	31	17
Expected return on plan assets	19	18	37	38
Net periodic pension benefit	$ (2)	$ (6)	$ (4)	$ (15)