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Workforce Reduction
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Employees
Postemployment Benefits [Abstract]  
Other Postretirement Benefits Cost (Reversal of Cost) | $ $ 72
Voluntary Retirement Program  
Postemployment Benefits [Abstract]  
Entity Number of Employees 400
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Entity Number of Employees 400
Employee Severance  
Postemployment Benefits [Abstract]  
Entity Number of Employees 150
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Entity Number of Employees 150