Loans and Leases Classified by Primary Purpose (Detail) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Loans and leases held for sale:
Commercial and industrial loans		$ 12	$ 36
Commercial mortgage loans		15	11
Commercial construction loans			2
Commercial leases		1	1
Residential mortgage loans		859	1,193
Home equity		44
Automobile loans		5
Other consumer loans and leases		59	18
Total loans and leases held for sale	[1]	995	1,261
Portfolio loans and leases:
Commercial and industrial loans		42,800	40,765
Commercial mortgage loans		7,150	7,399
Commercial construction loans		2,709	2,069
Commercial leases		3,881	3,720
Total commercial loans and leases		56,540	53,953
Residential mortgage loans		12,933	12,389
Home equity		8,547	8,886
Automobile loans		11,909	12,037
Credit card		2,278	2,401
Other consumer loans and leases		496	418
Total consumer loans and leases		36,163	36,131
Portfolio loans and leases	[2],[3]	$ 92,703	$ 90,084

[1] Includes $628 and $561 of residential mortgage loans held for sale measured at fair value at June 30, 2015 and December 31, 2014, respectively.

[2] Includes $156 and $179 of cash and due from banks, $2,547 and $3,378 of portfolio loans and leases, $(29) and $(22) of ALLL, $23 and $25 of other assets, $4 and $5 of other liabilities, and $2,542 and $3,434 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2015 and December 31, 2014, respectively. For further information refer to Note 10.

[3] Includes $178 and $108 of residential mortgage loans measured at fair value at June 30, 2015 and December 31, 2014, respectively.