Employee Benefits - Schedule of Net Periodic Benefit (Income) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan [Member]
Components of net periodic (benefit) expense
Service cost	$ 11	$ 15	$ 23	$ 28
Interest cost	50	49	102	99
Expected return on plan assets	(102)	(138)	(202)	(276)
Recognition of prior service credit	(2)	(3)	(5)	(5)
Recognition of actuarial loss	30	49	67	98
Net periodic benefit expense (income)	(13)	(28)	(15)	(56)
Post-Retirement Benefit Plans
Components of net periodic (benefit) expense
Service cost	2	3	5	7
Interest cost	15	11	30	23
Recognition of prior service credit	2	4	4	8
Recognition of actuarial loss	0	1	0	2
Net periodic benefit expense (income)	$ 19	$ 19	$ 39	$ 40