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Pension and Other Postretirement Benefits - Schedule of Reconciliation of Plan Assets Measured by Significant Unobservable Inputs (Details) - Level 3 - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Plan Assets    
Balance at beginning of period $ 218 $ 360
Foreign currency translation (9) (1)
Asset returns – assets held at reporting date (11) (19)
Asset returns – assets sold during the period 10 43
Purchases, sales and settlements, net 44 (165)
Balance at end of period 252 218
Pension Plan    
Plan Assets    
Balance at beginning of period 218  
Balance at end of period 252 218
Hedge funds    
Plan Assets    
Balance at beginning of period 0 2
Foreign currency translation 0 0
Asset returns – assets held at reporting date 0 (1)
Asset returns – assets sold during the period 0 1
Purchases, sales and settlements, net 0 (2)
Balance at end of period 0 0
Private equity    
Plan Assets    
Balance at beginning of period 7 51
Foreign currency translation 0 0
Asset returns – assets held at reporting date (2) (48)
Asset returns – assets sold during the period 1 39
Purchases, sales and settlements, net (1) (35)
Balance at end of period 5 7
Private equity | Pension Plan    
Plan Assets    
Balance at beginning of period 7  
Balance at end of period 5 7
Real estate – direct    
Plan Assets    
Balance at beginning of period 211 307
Foreign currency translation (9) (1)
Asset returns – assets held at reporting date (9) 30
Asset returns – assets sold during the period 9 3
Purchases, sales and settlements, net 45 (128)
Balance at end of period 247 211
Real estate – direct | Pension Plan    
Plan Assets    
Balance at beginning of period 40  
Balance at end of period $ 44 $ 40