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Pensions and Other Postretirement Benefits - Health Care Cost Trend Assumptions (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
Retirement Benefits [Abstract]  
One-percentage point increase change in total service and interest cost components $ 1
One-percentage point decrease change total service and interest cost components (1)
One-percentage point increase change in postretirement benefit obligations 6
One-percentage point decrease change in postretirement benefit obligations $ (5)