Loans & Leases (Loans and Leases - Additional Information) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019		Dec. 31, 2018		Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable
Unamortized premiums and discounts, deferred direct loan origination fees and costs, and fair value adjustments	$ 130		$ 296
Unearned Income	491		479
Loans pledged at the FHLB	16,800		13,100
Loans pledged at the FRB	42,400		42,600
Direct financing lease - interest income	22
Allowance for loan and lease losses	1,115	[1]	1,103	[1]	$ 1,138	$ 1,196
Commercial leases
Accounts, Notes, Loans and Financing Receivable
Allowance for loan and lease losses	$ 20		$ 18

[1] Includes $ 39 and $ 40 of other short-term investments , $ 573 and $ 668 of portfolio loans and leases, $ (3) and $ (4) of ALLL, $ 3 and $ 5 of other assets, $ 1 and $ 1 of other liabilities, and $ 510 and $ 606 of long-term debt from consolidated VIEs that are included in their respe ctive captions above at March 31, 2019 and December 31, 2018 , respectively. For further information refer to Note 13 .