Retirement Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 10	$ 12	$ 19	$ 25
Interest cost	25	17	50	33
Expected return on plan assets	(40)	(52)	(79)	(105)
Amortization of unrecognized net actuarial losses	1	3	1	6
Settlement loss	0	2	0	2
Pension (income) expense	(4)	(18)	(9)	(39)
Net non-service pension (income) costs included in other, net	$ (14)	$ (30)	$ (28)	$ (64)