Retirement Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Retirement Benefits [Abstract]
Service cost	$ 11	$ 10	$ 21	$ 19
Interest cost	23	25	46	50
Expected return on plan assets	(38)	(40)	(76)	(79)
Amortization of unrecognized net actuarial losses	1	1	1	1
Pension (income) expense	(3)	(4)	(8)	(9)
Net non-service pension (income) costs included in other, net	$ (14)	$ (14)	$ (29)	$ (28)