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Leases - Lease Amounts Included in Consolidated Income Statement (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Lease income - sales-type and direct financing leases        
Sales-type lease selling price $ 120 $ 154 $ 877 $ 733
Less: Carrying value of underlying assets 49 64 211 258
Gross profit 71 90 666 475
Interest income on lease receivables 44 56 142 195
Total sales-type and direct financing lease income 115 145 808 670
Lease income - operating leases 38 65 137 204
Variable lease income 18 25 97 82
Total lease income $ 171 $ 235 $ 1,042 $ 956