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Retirement Plans - Net Periodic Pension Expense for Defined Benefit Pension Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
(Gain) loss on settlements $ (42)    
Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost   $ 17 $ 18
Interest cost   7 10
Expected return on assets   (28) (26)
Amortization of prior service credit   (1) (1)
Recognized net actuarial loss   6 6
Curtailments   0 0
(Gain) loss on settlements   198 (1)
Net periodic pension expense   $ 199 $ 6