Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Retirement Benefits [Abstract]
Service cost	$ 54	$ 55	$ 160	$ 164
Interest cost	102	94	307	282
Expected return on plan assets	(147)	(146)	(440)	(438)
Prior service cost (credit) amortization	(1)	(1)	(3)	(3)
Actuarial loss (gain) amortization	1	2	3	7
Net periodic benefit cost	$ 9	$ 4	$ 27	$ 12