Leases Lessor, Lease Maturity (Details) $ in Millions	Jun. 30, 2019 USD ($)
Lessor, Lease Maturity [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Rolling Twelve Months	$ 834
Sales-type and Direct Financing Leases, Lease Receivable, Lease Payments to be Received, Rolling Year Two	761
Sales-type and Direct Financing Leases, Lease Receivable, Lease Payments to be Received, Rolling Year Three	600
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Rolling Year Four	420
Sales-type and Direct Financing Leases, Lease Receivable, Lease Payments to be Received, Rolling Year Five	341
Sales-type and Direct Financing Leases, Lease Receivable, Lease Payments to be Received, after Rolling Year Five	1,347
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	4,303
Lease Receivable Reconciling Items	496	[1]
Sales-type and Direct Financing Leases, Lease Receivable	3,807
Lessor, Operating Lease, Payments to be Received, Next Rolling Twelve Months	180
Lessor, Operating Lease, Payments to be Received, Rolling Year Two	159
Lessor, Operating Lease, Payments to be Received, Rolling Year Three	131
Lessor, Operating Lease, Payments to be Received, Rolling Year Four	99
Lessor, Operating Lease, Payments to be Received, Rolling Year Five	96
Lessor, Operating Lease, Payments to be Received, Thereafter	238
Lessor, Operating Lease, Payments to be Received	$ 903

[1] Primarily comprised of interest and guaranteed residual assets.