Leases Lessor, Classification (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Equipment Financing [Member]
Lessor, Lease, Description [Line Items]
Residual Value of Leased Asset	$ 110
Equipment Financing [Member] | Minimum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Lease, Term of Contract	3 years
Lessor, Lease, Renewal Term	1 month
Equipment Financing [Member] | Maximum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Lease, Term of Contract	15 years
Lessor, Lease, Renewal Term	3 years
Structured Real Estate [Member]
Lessor, Lease, Description [Line Items]
Residual Value of Leased Asset	$ 29
Structured Real Estate [Member] | Minimum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Lease, Term of Contract	15 years
Structured Real Estate [Member] | Maximum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Lease, Term of Contract	20 years
Lessor, Lease, Renewal Term	20 years