Loans & Leases (Investment in Lease Financing) (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable
Accumulated allowance for uncollectible minimum lease payments	$ 1,196	[1]	$ 1,253	[1]	$ 1,272	$ 1,322
Leases
Accounts, Notes, Loans and Financing Receivable
Accumulated allowance for uncollectible minimum lease payments	$ 14		$ 15

[1] Includes $ 0 and $ 85 of cash and due from banks, $ 62 and $ 0 of other short-term investments, $ 1,297 and $ 1,216 of portfolio loans and leases, $ (6) and $ (26) of ALLL, $ 7 and $ 9 of other assets, $ 2 and $ 3 of other liabilities and $ 1,190 and $ 1,094 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2017 and 2016 , respectively. For further information, refer to Note 11 .