Employee Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 55	$ 56	$ 164	$ 168
Interest cost	94	93	282	278
Expected return on plan assets	(146)	(137)	(438)	(410)
Prior service cost (credit) amortization	(1)	0	(3)	(1)
Actuarial loss (gain) amortization	2	1	7	3
Net periodic benefit cost	$ 4	$ 13	$ 12	$ 38