Employee Benefits - Schedule of Net Periodic Benefit (Income) Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Plans
Components of net periodic (benefit) expense
Service cost	$ 11	$ 14	$ 34	$ 42
Interest cost	53	49	155	148
Expected return on plan assets	(100)	(138)	(302)	(414)
Settlement charges	0	57	0	57
Recognition of prior service credit	(3)	(2)	(8)	(7)
Recognition of actuarial loss	32	49	99	147
Net periodic benefit expense (income)	(7)	29	(22)	(27)
Post-Retirement Benefit Plans
Components of net periodic (benefit) expense
Service cost	3	4	8	11
Interest cost	15	12	45	35
Recognition of prior service credit	1	3	5	11
Recognition of actuarial loss	0	2	0	4
Net periodic benefit expense (income)	$ 19	$ 21	$ 58	$ 61