Loans & Leases (Components of Net Investment in Leases) (Detail) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable
Rental receivable, net of principal and interest on nonrecourse debt			$ 3,256
Estimated residual value of leased assets			804
Initial direct cost, net of amortization			19
Gross investment in lease financing			4,079
Unearned income			(479)
Net investment in lease financing		$ 571	3,600
Sales type lease unguaranteed residual asset	[1]	4
Direct financing lease unguaranteed residual asset	[1]	261
Net discount		130	296
Leveraged leases		571	$ 3,600
Direct financing
Accounts, Notes, Loans and Financing Receivable
Lease payment receivable	[1]	2,992
Net discount	[1]	(12)
Direct financing deferred selling profit	[1]	0
Sales-type
Accounts, Notes, Loans and Financing Receivable
Lease payment receivable	[1]	94
Net discount	[1]	$ (1)

[1] (a ) Excludes $ 571 of leveraged leases at March 31, 2019 .