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	$ 1,201	$ 1,197
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,125	1,126
Projected benefit obligation	1,131	1,126
Funded status	(6)	0
Amounts Recognized on the Consoildated Balance Sheets
Other assets	80	91
Other liabilities	(86)	(91)
Net amount recognized	$ (6)	$ 0
Weighted-Average Assumptions Benefit obligations:
Weighted-average discount rate	5.11%	5.49%
Net periodic benefit cost:
Weighted-average discount rate	5.46%	2.81%
Expected return on plan assets	6.25%	5.67%
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 76	$ 71
Projected benefit obligation	42	44
Funded status	34	27
Amounts Recognized on the Consoildated Balance Sheets
Other assets	34	27
Other liabilities	0	0
Net amount recognized	$ 34	$ 27
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%