Retirement and Deferred Compensation Plans (Benefit Plans' Assets and Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 116	$ 123
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	108	115
Projected benefit obligation	107	116
Funded status	1	(1)
Amounts Recognized on the Consolidated Balance Sheets
Other assets	4
Other liabilities	(3)	(1)
Net amount recognized	$ 1	$ (1)
Weighted-Average Assumptions, Benefit obligations:
Weighted-average discount rate	3.07%	2.95%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Weighted-average discount rate	2.95%	3.50%
Expected return on plan assets	4.25%	4.25%
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 8	$ 8
Projected benefit obligation	9	10
Funded status	(1)	(2)
Amounts Recognized on the Consolidated Balance Sheets
Other liabilities	(1)	(2)
Net amount recognized	$ (1)	$ (2)
Weighted-Average Assumptions, Benefit obligations:
Weighted-average discount rate	3.10%	2.96%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Weighted-average discount rate	2.96%	3.50%
Expected return on plan assets	6.50%	6.50%