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Operating Lease Equipment (Tables)
 9 Months Ended
Sep. 30, 2021
Leases [Abstract]  
Future Lease Payments Receivable from Operating Leases
The following table presents future lease payments receivable from operating leases for the remainder of 2021 through 2026 and thereafter:
As of September 30, 2021 ($ in millions)Undiscounted
Cash Flows
Remainder of 2021$36 
2022129 
2023102 
202466 
202543 
202624 
Thereafter26 
Total operating lease payments$426