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Retirement Plans (Change in Plan Assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]    
Beginning fair value of plan assets $ 543 $ 522
Actual return (109) 17
Employer contributions 19 33
Employee contributions 5 8
Foreign exchange impact (24) (29)
Benefits paid (14) (8)
Ending fair value of plan assets $ 420 $ 543