Employee Benefits (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 55	$ 56
Interest cost	94	93
Expected return on plan assets	(146)	(137)
Prior service cost (credit) amortization	(1)	0
Actuarial loss (gain) amortization	2	1
Net periodic benefit cost	$ 4	$ 13