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Pension and Other Postretirement Benefits - Schedule of Changes in Net Loss and Prior Service Cost/(Credit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension Plan      
Net loss      
Balance at beginning of period $ 814 $ 1,802 $ 1,808
Reclassification to net periodic benefit cost (49) (1,629) (150)
Current year loss / (gain) (45) 640 118
Amendments 0 (1) 0
Foreign currency translation (8) 2 26
Balance at end of period 712 814 1,802
Prior service      
Balance at beginning of period 2 8 8
Reclassification to net periodic benefit cost (1) (4) (1)
Current year loss / (gain) (1) (2) 0
Amendments 0 0 1
Foreign currency translation 0 0 0
Balance at end of period 0 2 8
Other Postretirement Benefits      
Net loss      
Balance at beginning of period 21 45 42
Reclassification to net periodic benefit cost (2) (4) (4)
Current year loss / (gain) (22) (20) 7
Foreign currency translation 1 0 0
Balance at end of period (2) 21 45
Prior service      
Balance at beginning of period (20) (46) (72)
Reclassification to net periodic benefit cost 20 26 26
Current year loss / (gain) 0 0 0
Foreign currency translation 0 0 0
Balance at end of period $ 0 $ (20) $ (46)