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Lessor - Components of Lease Income (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Revenue from sales type leases $ 126 $ 134
Interest income on lease receivables 59 63
Lease income - operating leases 86 104
Variable lease income 22 27
Total Lease income 293 $ 328
Profit at lease commencement, sales type leases $ 43