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Current Liabilities
12 Months Ended
Dec. 31, 2022
Payables and Accruals [Abstract]  
Current Liabilities Current Liabilities 
 December 31,
 20222021
 ($ in millions)
Accounts payable:  
Accounts and wages payable$712 $850 
Due to Conrail (Note 6)173 112 
Casualty and other claims (Note 17)170 166 
Vacation liability136 119 
Other102 104 
Total$1,293 $1,351 
Other current liabilities:  
Interest payable$157 $150 
Current operating lease liability (Note 10)94 82 
Pension benefit obligations (Note 12)20 20 
Other70 60 
Total$341 $312