Summary of Transactions in the ALLL (Detail) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Beginning Balance	$ (2,614)		$ (3,693)		$ (3,004)	[1]	$ (3,749)
Impact of change in accounting principle							45
Losses charged off	(294)		(992)		(1,034)		(2,086)
Recoveries of losses previously charged off	32		36		101		114
Provision for loan and lease losses	87		457		368		1,372
Ending Balance	$ 2,439	[1]	$ 3,194	[1]	$ 2,439	[1]	$ 3,194	[1]

[1] Includes $35, $52, and $56 of cash, $7, $7 and $7 of other short-term investments, $29, $29 and $29 of commercial mortgage loans, $228, $241 and $248 of home equity loans, $334, $648 and $771 of automobile loans, ($10), ($14) and ($15) of ALLL, $3, $7 and $7 of other assets, $5, $12 and $17 of other liabilities and $270, $692 and $834 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2011, December 31, 2010 and September 30, 2010, respectively. See Note 9.