Loans and Leases Classified by Primary Purpose (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Loans and leases held for sale:
Commercial and industrial loans	$ 101		$ 31
Commercial mortgage loans	1		3
Commercial leases			1
Commercial construction loans	2		2
Residential mortgage loans	649		890
Other consumer loans and leases	27		17
Total loans and leases held for sale	780	[1]	944	[1]
Portfolio loans and leases:
Commercial and industrial loans	40,591		39,316
Commercial mortgage loans	7,958	[2]	8,066	[2]
Commercial construction loans	1,218		1,039
Commercial leases	3,577		3,625
Total commercial loans and leases	53,344		52,046
Residential mortgage loans	12,626	[3]	12,680	[3]
Home equity	9,125		9,246
Automobile loans	12,088	[2]	11,984	[2]
Credit card	2,177		2,294
Other consumer loans and leases	345		364
Total consumer loans and leases	36,361		36,568
Portfolio loans and leases	$ 89,705		$ 88,614

[1] Includes $649 and $890 of residential mortgage loans held for sale measured at fair value at March 31, 2014 and December 31, 2013, respectively.

[2] Includes $102 and $49 of cash and due from banks, $7 and $0 of other short-term investments, $48 and $48 of commercial mortgage loans, $2,031 and $1,010 of automobile loans, $(18) and $(15) of ALLL, $23 and $13 of other assets, $3 and $1 of other liabilities, and $2,119 and $1,048 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2014 and December 31, 2013, respectively. See Note 8.

[3] Includes $103 and $92 of residential mortgage loans measured at fair value at March 31, 2014 and December 31, 2013, respectively.