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Pension and Other Postretirement Benefits (Details 5) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Retirement Benefits [Abstract]      
Employer contribution $ 34 $ 19 $ 25
Nonqualified supplemental pension plan      
Pension and Other Postretirement Benefits      
Accrued expenses 1 1  
Other noncurrent liability 10 10  
Expenses recognized $ 1 $ 1 $ 2