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Employee Benefits (Tables)
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost
The components of net periodic benefit cost for our retirement plans and postretirement plans for the periods ended September 30 are as follows: 

(in millions)Three MonthsNine Months
2024202320242023
Service cost$— $— $1 $1 
Interest cost18 19 53 56 
Expected return on assets(24)(26)(73)(76)
Amortization of prior service credit / actuarial loss1 1 3 2 
Net periodic benefit cost$(5)$(6)$(16)$(17)