Loans and Leases Classified by Primary Purpose (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Loans and leases held for sale:
Commercial and industrial loans	$ 39		$ 31
Commercial mortgage loans	2		3
Commercial construction loans	2		2
Commercial leases	1		1
Residential mortgage loans	579		890
Other consumer loans and leases	18		17
Total loans and leases held for sale	641	[1]	944	[1]
Portfolio loans and leases:
Commercial and industrial loans	41,072		39,316
Commercial mortgage loans	7,564	[2]	8,066	[2]
Commercial construction loans	1,702		1,039
Commercial leases	3,554		3,625
Total commercial loans and leases	53,892		52,046
Residential mortgage loans	12,941	[3]	12,680	[3]
Home equity	8,987		9,246
Automobile loans	12,121	[2]	11,984	[2]
Credit card	2,317		2,294
Other consumer loans and leases	366		364
Total consumer loans and leases	36,732		36,568
Portfolio loans and leases	$ 90,624		$ 88,614

[1] Includes $579 and $890 of residential mortgage loans held for sale measured at fair value at September 30, 2014 and December 31, 2013, respectively.

[2] Includes $150 and $49 of cash and due from banks, $48 and $48 of commercial mortgage loans, $2,785 and $1,010 of automobile loans, $(19) and $(15) of ALLL, $26 and $13 of other assets, $7 and $1 of other liabilities, and $2,882 and $1,048 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2014 and December 31, 2013, respectively. See Note 10.

[3] Includes $109 and $92 of residential mortgage loans measured at fair value at September 30, 2014 and December 31, 2013, respectively.