Retirement and Deferred Compensation Plans - Benefit Plan Assets and Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 81	$ 86
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	71	77
Projected benefit obligation	77	82
Funded status	(6)	(5)
Amounts Recognized on the Consoildated Balance Sheets
Other assets	0	0
Other liabilities	(6)	(5)
Net amount recognized	$ (6)	$ (5)
Weighted-Average Assumptions Benefit obligations:
Weighted-average discount rate	5.44%	5.66%
Net periodic benefit cost:
Weighted-average discount rate	5.62%	3.07%
Expected return on plan assets	6.00%	5.00%
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 10	$ 9
Projected benefit obligation	6	6
Funded status	4	3
Amounts Recognized on the Consoildated Balance Sheets
Other assets	4	3
Other liabilities	0	0
Net amount recognized	$ 4	$ 3
Weighted-Average Assumptions Benefit obligations:
Weighted-average discount rate	5.45%	5.70%
Net periodic benefit cost:
Weighted-average discount rate	5.70%	3.73%
Expected return on plan assets	6.50%	6.50%