Retirement and Deferred Compensation Plans - Fair Value of Benefit Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,201	$ 1,197
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	229	292
U.S. government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	257	196
Foreign government bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1	128
State and municipal bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	22
Limited partnerships and common and preferred stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	331	353
Bulk annuity insurance policy
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	250	89
Cash and invested cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	37	46
Other investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 76	$ 71