Retirement Plans - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Benefits [Abstract]
Service cost	$ 11	$ 9	$ 32	$ 28
Interest cost	25	25	71	75
Expected return on plan assets	(41)	(39)	(117)	(118)
Amortization of unrecognized net actuarial losses	2	0	3	1
Pension prior service cost	35	0	35	0
Net periodic benefit cost (income)	32	(5)	24	(14)
Net periodic benefit cost (income), excluding service cost, included in Other, net	$ 21	$ (14)	$ (8)	$ (42)