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	$ 1,734	$ 1,736
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,667	1,670
Projected benefit obligation	1,595	1,698
Funded status	72	(28)
Amounts Recognized on the Consolidated Balance Sheets
Other assets	182	88
Other liabilities	(110)	(116)
Net amount recognized	$ 72	$ (28)
Weighted-Average Assumptions, Benefit obligations:
Weighted-average discount rate	2.76%	2.58%
Weighted-Average Assumptions, Net periodic benefit cost:
Weighted-average discount rate	2.61%	3.12%
Expected return on plan assets	6.13%	6.10%
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 67	$ 66
Projected benefit obligation	79	79
Funded status	(12)	(13)
Amounts Recognized on the Consolidated Balance Sheets
Other liabilities	(12)	(13)
Net amount recognized	$ (12)	$ (13)
Weighted-Average Assumptions, Benefit obligations:
Weighted-average discount rate	3.10%	2.96%
Weighted-Average Assumptions, Net periodic benefit cost:
Weighted-average discount rate	2.96%	3.50%
Expected return on plan assets	6.50%	6.50%