Leases (Narrative) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)		Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 16		$ 47
Variable lease expense	4		11
Lease expense	20		58
Right of use assets	320		320
Operating lease liabilities	$ 358		$ 358
Weighted average lease term for lease liabilities	9 years		9 years
Weighted average discount rate of remaining payments	3.82%		3.82%
New Right of Use Assets			$ 35
Cash paid on operating lease liabilities	$ 17		50
Lease-related revenue	4		10
Sales-type and Direct Financing Leases, Lease Receivable	$ 361	[1]	$ 361	[1]

[1] Excludes net investment in leveraged leases of $217 million.