Employee Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 54	$ 56	$ 109	$ 112
Interest cost	94	93	188	185
Expected return on plan assets	(146)	(137)	(292)	(273)
Prior service cost (credit) amortization	(1)	0	(2)	(1)
Actuarial loss (gain) amortization	3	1	5	2
Net periodic benefit cost	$ 4	$ 13	$ 8	$ 25