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Retirement and Deferred Compensation Plans (Fair Value of Benefit Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	$ 86	$ 116
Corporate Bonds [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	33	49
U.S. Government Bonds [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	17	20
CMBS [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	2	2
Common Stock, [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	22	32
Cash And Invested Cash [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	3	5
Other Investments [Member]
Fair Value of Benefit Plans' Assets [Abstract]
Fair value of plan assets	$ 9	$ 8

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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