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Other Liabilities
 12 Months Ended
Dec. 31, 2023
Other Liabilities Disclosure [Abstract]  
Other Liabilities Other Liabilities
 December 31,
 20232022
 ($ in millions)
Long-term advances from Conrail (Note 6)
$534 $534 
Non-current operating lease liability (Note 10)287 316 
Net pension benefit obligations (Note 12)279 255 
Casualty and other claims (Note 17)221 218 
Net other postretirement benefit obligations (Note 12)172 204 
Non-current Eastern Ohio incident liability (Note 17)118 — 
Deferred compensation80 91 
Other148 141 
Total$1,839 $1,759