Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Retirement Benefits [Abstract]
Service cost	$ 53	$ 55
Interest cost	103	94
Expected return on plan assets	(147)	(146)
Prior service cost (credit) amortization	(1)	(1)
Actuarial loss (gain) amortization	1	2
Net periodic benefit cost	$ 9	$ 4