Employee Benefit Plans - Schedule of Pre-tax Change in Other Comprehensive Loss (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Recognized in the Balance Sheet
(Gains) Losses	$ (143)	$ 28
Expense (Income) Recognized in the Income Statement
Amortization of Net Loss	73	54	$ 30
Settlement Gain	0	(1)	0
Amortization of Prior Service Costs	0	0	0
Post-retirement Benefits
Recognized in the Balance Sheet
(Gains) Losses	(4)	(11)
Expense (Income) Recognized in the Income Statement
Amortization of Net Loss	0	1	0
Settlement Gain	0	0	0
Amortization of Prior Service Costs	$ (7)	$ (7)	$ (7)