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Retirement and Benefit Plans - Defined Benefit Retirement Plans with Overfunded and Underfunded Status (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Change In Fair Value Roll Forward      
Fair value of plan assets at January 1 $ 173    
Fair value of plan assets at December 31 152 $ 173  
Defined Benefit Plan, Change in Benefit Obligation      
Interest cost 4 6 $ 7
Underfunded defined benefit pension plans      
Defined Benefit Plan Change In Fair Value Roll Forward      
Fair value of plan assets at January 1 173 175  
Actual return on assets (3) 13  
Contributions 1 2  
Settlement (12) (9)  
Benefits paid (7) (8)  
Fair value of plan assets at December 31 152 173 175
Defined Benefit Plan, Change in Benefit Obligation      
Projected benefit obligation at January 1 203 194  
Interest cost 4 6  
Settlement (12) (9)  
Actuarial (gain) loss (12) 20  
Benefits paid (7) (8)  
Projected benefit obligation at December 31 176 203 $ 194
Underfunded projected benefit obligation at December 31 (24) (30)  
Accumulated benefit obligation at December 31 $ 176 $ 203