Change in Fair Value of Financial Instruments for which the FVO has been Elected (Detail) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Trading Account Profits and Commissions | Trading Account Assets
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	$ 5		$ (4)		$ 12		$ (3)
Trading Account Profits and Commissions | Brokered Deposits
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	8		23		(3)		(8)
Trading Account Profits and Commissions | Long-Term Debt
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(21)		(39)		(38)		(125)
Trading Account Profits and Commissions | Loans Held-for-Sale
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(4)		(4)		(2)		7
Trading Account Profits and Commissions | Loans Held-for-Investment
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option			(2)		3		(2)
Mortgage Production Income | Mortgage Servicing Rights
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	2	[1]	2	[2]	4	[1]	6	[2]
Mortgage Production Income | Loans Held-for-Sale
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	119	[1]	200	[2]	149	[1]	292	[2]
Mortgage Production Income | Loans Held-for-Investment
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option			8	[2]	(4)	[1]	8	[2]
Mortgage Servicing Income | Mortgage Servicing Rights
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(162)		(411)		(145)		(520)
Trading Account Assets
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	5	[3]	(4)	[4]	12	[3]	(3)	[4]
Loans Held-for-Sale
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	115	[3]	196	[4]	147	[3]	299	[4]
Mortgage Servicing Rights
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(160)	[3]	(409)	[4]	(141)	[3]	(514)	[4]
Brokered Deposits
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	8	[3]	23	[4]	(3)	[3]	(8)	[4]
Long-Term Debt
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(21)	[3]	(39)	[4]	(38)	[3]	(125)	[4]
Loans Held-for-Investment
Fair Value Gain/(Loss) for Items Measured at Fair Value Pursuant to Election of the Fair Value Option			$ 6	[4]	$ (1)	[3]	$ 6	[4]

[1] For the three and six months ended June 30, 2011, income related to LHFS includes $46 million and $132 million, respectively, related to MSRs recognized upon the sale of loans reported at fair value. For the three and six months ended June 30, 2011, income related to MSRs includes $2 million and $4 million, respectively, of MSRs recognized upon the sale of loans reported at LOCOM. These MSRs are included in the table since the Company elected to report MSRs recognized in 2009 using the fair value method. Previously, MSRs were reported under the amortized cost method.

[2] For the three and six months ended June 30, 2010, income related to LHFS, includes $65 million and $128 million, respectively, related to MSRs recognized upon the sale of loans reported at fair value. For the three and six months ended June 30, 2010, income related to MSRs includes $3 million and $6 million, respectively, of MSRs recognized upon the sale of loans reported at LOCOM. These MSRs are included in the table since the Company elected to report MSRs recognized in 2009 using the fair value method. Previously, MSRs were reported under the amortized cost method.

[3] Changes in fair value for the three and six months ended June 30, 2011, exclude accrued interest for the periods then ended. Interest income or interest expense on trading assets, LHFS, LHFI, brokered deposits and long-term debt that have been elected to be carried at fair value are recorded in interest income or interest expense in the Consolidated Statements of Income/(Loss) based on their contractual coupons. Certain trading assets do not have a contractually stated coupon and, for these securities, the Company records interest income based on the effective yield calculated upon acquisition of the securities.

[4] Changes in fair value for the three and six months ended June 30, 2010, exclude accrued interest for the periods then ended. Interest income or interest expense on trading assets, LHFS, LHFI, brokered deposits and long-term debt that have been elected to be carried at fair value are recorded in interest income or interest expense in the Consolidated Statements of Income/(Loss) based on their contractual coupons. Certain trading assets do not have a contractually stated coupon and, for these securities, the Company records interest income based on the effective yield calculated upon acquisition of those securities.