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Leases (Tables)
9 Months Ended
Sep. 30, 2023
Leases [Abstract]  
Schedule of Lease Expense
The components of lease expense consist of the following (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
Classification2023202220232022
Operating lease cost(a)
Direct operating$32 $37 $99 $103 
Finance lease cost:
Amortization of ROU assetsDepreciation and amortization17 16 
Interest on lease liabilitiesInterest expense, net— — 
Sublease incomeEquipment rental revenue(13)(23)(45)(62)
Net lease cost$25 $20 $72 $58 

(a) Includes short-term leases of $11 million and $39 million for the three and nine months ended September 30, 2023, respectively, and $18 million and $51 million for the three and nine months ended September 30, 2022, respectively, and variable lease costs of $1 million and $3 million for the three and nine months ended September 30, 2023, respectively, and $1 million and $2 million for the three and nine months ended September 30, 2022, respectively.