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Pension and Other Postretirement Benefits - Schedule of Projected and Changes in Benefit Obligations (Details)
£ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
GBP (£)
Dec. 31, 2020
USD ($)
Projected Benefit Obligations        
Actuarial (gain) / loss $ (46)      
Plan Assets        
Employer contributions | £     £ 196  
Other Postretirement Benefits        
Projected Benefit Obligations        
Benefit obligations at beginning of period 137 $ 163    
Service cost 1 1   $ 1
Interest cost 4 4   5
Actuarial (gain) / loss (22) (20)    
Benefits paid (11) (10)    
Foreign currency translation (1) (1)    
Benefit obligations at end of period 108 137   163
U.S. Plans | Pension Plan        
Projected Benefit Obligations        
Benefit obligations at beginning of period 1,413 1,505    
Service cost 19 20   18
Interest cost 31 25   38
Plan participants’ contributions 0 0    
Amendments 1 2    
Settlements (9) 0    
Curtailments (2) (10)    
Special termination benefits 0 6    
Actuarial (gain) / loss (266) (43)    
Benefits paid (93) (92)    
Foreign currency translation 0 0    
Benefit obligations at end of period 1,094 1,413   1,505
Plan Assets        
Balance at beginning of period 1,177 1,152    
Actual return on plan assets (199) 115    
Employer contributions 10 2    
Plan participants’ contributions 0 0    
Settlements (9) 0    
Benefits paid (93) (92)    
Foreign currency translation 0 0    
Balance at end of period 886 1,177   1,152
Funded status (208) (236)    
Accumulated benefit obligations at end of period 1,055 1,361    
Non-U.S. Plans | Pension Plan        
Projected Benefit Obligations        
Benefit obligations at beginning of period 513 3,172    
Service cost 9 13   10
Interest cost 13 32   52
Plan participants’ contributions 2 2    
Amendments 0 (3)    
Settlements (9) (2,982)    
Curtailments 0 (7)    
Special termination benefits 0 0    
Actuarial (gain) / loss (95) 444    
Benefits paid (30) (165)    
Foreign currency translation (16) 7    
Benefit obligations at end of period 387 513   3,172
Plan Assets        
Balance at beginning of period 529 3,518    
Actual return on plan assets (22) (94)    
Employer contributions (63) 234    
Plan participants’ contributions 2 2    
Settlements (7) (2,982)    
Benefits paid (31) (165)    
Foreign currency translation (27) 16    
Balance at end of period 381 529   $ 3,518
Funded status (6) 16    
Accumulated benefit obligations at end of period $ 361 $ 474