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Retirement Plans (Deferred Compensation Plan) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Retirement Savings Plan [Member]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 19.8 $ 19.2 $ 18.6