Loans and Leases Classified by Primary Purpose (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Loans and leases held for sale:
Commercial and industrial loans	$ 31		$ 39
Commercial mortgage loans	3		13
Commercial leases	1
Commercial construction loans	2		9
Residential mortgage loans	890		2,856
Other consumer loans and leases	17		22
Total loans and leases held for sale	944	[1]	2,939	[1]
Portfolio loans and leases:
Commercial and industrial loans	39,316		36,038
Commercial mortgage loans	8,066	[2]	9,103	[2]
Commercial construction loans	1,039		698
Commercial leases	3,625		3,549
Total commercial loans and leases	52,046		49,388
Residential mortgage loans	12,680	[3]	12,017	[3]
Home equity	9,246		10,018
Automobile loans	11,984	[2]	11,972	[2]
Credit card	2,294		2,097
Other consumer loans and leases	364		290
Total consumer loans and leases	36,568		36,394
Portfolio loans and leases	$ 88,614		$ 85,782

[1] Includes $890 and $2,856 of residential mortgage loans held for sale measured at fair value at December 31, 2013, and 2012, respectively.

[2] At December 31, 2013 and 2012, includes $49 and $0 of cash and due from banks, $48 and $50 of commercial mortgage loans, $ 1,010 and $0 of automobile loans, $(15) and $(5) of ALLL, $13 and $3 of other assets, $1 and $0 of other liabilities, $ 1,048 and $0 of long-term debt from consolidated VIEs that are included in their respective captions. See Note 10.

[3] Includes $92 and $76 of residential mortgage loans measured at fair value at December 31, 2013 and 2012, respectively.