Reconciliation of the Beginning and Ending Balances for Fair Valued Assets and Liabilities Measured on a Recurring Basis Using Significant Unobservable Inputs (Detail) (USD $) In Millions	3 Months Ended				6 Months Ended				3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended				6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended								3 Months Ended	6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended		6 Months Ended			3 Months Ended				6 Months Ended				3 Months Ended			6 Months Ended			3 Months Ended		6 Months Ended
	Jun. 30, 2011 Trading Account Assets		Jun. 30, 2010 Trading Account Assets		Jun. 30, 2011 Trading Account Assets		Jun. 30, 2010 Trading Account Assets		Jun. 30, 2010 Trading Account Assets US States and Political Subdivisions Debt Securities	Jun. 30, 2010 Trading Account Assets US States and Political Subdivisions Debt Securities	Jun. 30, 2010 Trading Account Assets Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2011 Trading Account Assets Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2010 Trading Account Assets Mortgage-backed Securities, Issued by Private Enterprises	Mar. 31, 2011 Trading Account Assets Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2010 Trading Account Assets Asset-backed Securities	Jun. 30, 2011 Trading Account Assets Asset-backed Securities	Jun. 30, 2010 Trading Account Assets Asset-backed Securities	Mar. 31, 2011 Trading Account Assets Asset-backed Securities	Jun. 30, 2011 Trading Account Assets Equity Securities	Jun. 30, 2010 Trading Account Assets Equity Securities	Jun. 30, 2011 Trading Account Assets Equity Securities	Jun. 30, 2010 Trading Account Assets Equity Securities	Jun. 30, 2010 Trading Account Assets Derivative Financial Instruments, Assets		Jun. 30, 2010 Trading Account Assets Derivative Financial Instruments, Assets		Jun. 30, 2010 Trading Account Assets Collateralized Debt Obligations	Jun. 30, 2011 Trading Account Assets Collateralized Debt Obligations	Jun. 30, 2010 Trading Account Assets Collateralized Debt Obligations	Mar. 31, 2011 Trading Account Assets Collateralized Debt Obligations	Jun. 30, 2011 Available-for-Sale Securities		Jun. 30, 2010 Available-for-Sale Securities		Jun. 30, 2011 Available-for-Sale Securities		Jun. 30, 2010 Available-for-Sale Securities		Jun. 30, 2011 Available-for-Sale Securities US States and Political Subdivisions Debt Securities	Jun. 30, 2010 Available-for-Sale Securities US States and Political Subdivisions Debt Securities	Jun. 30, 2011 Available-for-Sale Securities US States and Political Subdivisions Debt Securities	Jun. 30, 2010 Available-for-Sale Securities US States and Political Subdivisions Debt Securities	Jun. 30, 2011 Available-for-Sale Securities Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2010 Available-for-Sale Securities Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2011 Available-for-Sale Securities Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2010 Available-for-Sale Securities Mortgage-backed Securities, Issued by Private Enterprises	Jun. 30, 2011 Available-for-Sale Securities Asset-backed Securities	Jun. 30, 2010 Available-for-Sale Securities Asset-backed Securities	Jun. 30, 2011 Available-for-Sale Securities Asset-backed Securities	Jun. 30, 2010 Available-for-Sale Securities Asset-backed Securities	Jun. 30, 2011 Available-for-Sale Securities Corporate And Other Debt Securities	Mar. 31, 2011 Available-for-Sale Securities Corporate And Other Debt Securities	Dec. 31, 2010 Available-for-Sale Securities Corporate And Other Debt Securities	Jun. 30, 2010 Available-for-Sale Securities Corporate And Other Debt Securities	Mar. 31, 2010 Available-for-Sale Securities Corporate And Other Debt Securities	Dec. 31, 2009 Available-for-Sale Securities Corporate And Other Debt Securities	Jun. 30, 2011 Available-for-Sale Securities Equity Securities, Other	Jun. 30, 2011 Available-for-Sale Securities Equity Securities, Other	Jun. 30, 2010 Available-for-Sale Securities Equity Securities, Other	Mar. 31, 2010 Available-for-Sale Securities Equity Securities, Other	Dec. 31, 2009 Available-for-Sale Securities Equity Securities, Other	Jun. 30, 2011 Loans Held-for-Sale		Jun. 30, 2010 Loans Held-for-Sale Corporate And Other Debt Securities		Jun. 30, 2011 Loans Held-for-Sale Corporate And Other Debt Securities		Jun. 30, 2010 Loans Held-for-Sale Corporate And Other Debt Securities		Jun. 30, 2010 Loans Held-for-Sale Residential Mortgage, Loans Held For Sale		Jun. 30, 2011 Loans Held-for-Sale Residential Mortgage, Loans Held For Sale	Jun. 30, 2010 Loans Held-for-Sale Residential Mortgage, Loans Held For Sale		Jun. 30, 2011 Loans Held-for-Investment		Jun. 30, 2010 Loans Held-for-Investment		Jun. 30, 2011 Loans Held-for-Investment		Jun. 30, 2010 Loans Held-for-Investment		Jun. 30, 2011 Other Assets and Liabilities, Net	Jun. 30, 2010 Other Assets and Liabilities, Net		Jun. 30, 2011 Other Assets and Liabilities, Net	Jun. 30, 2010 Other Assets and Liabilities, Net		Jun. 30, 2011 Derivative Financial Instruments, Liabilities		Jun. 30, 2011 Derivative Financial Instruments, Liabilities		Jun. 30, 2010 Derivative Financial Instruments, Liabilities
Beginning balance	$ 105		$ 388		$ 209		$ 390		$ 6	$ 7	$ 5	$ 6	$ 6	$ 2	$ 51	$ 27	$ 51	$ 5	$ 56	$ 145	$ 123	$ 151	$ 22				$ 159	$ 53	$ 175	$ 42	$ 1,126		$ 1,318		$ 1,136		$ 1,322		$ 73	$ 131	$ 74	$ 132	$ 338	$ 369	$ 347	$ 378	$ 20	$ 108	$ 20	$ 102	$ 5	$ 5	$ 5	$ 5	$ 5	$ 5	$ 690	$ 690	$ 705	$ 705	$ 705	$ 17		$ 9		$ 5		$ 9		$ 152		$ 2	$ 142		$ 457		$ 422		$ 492		$ 449		$ (2)	$ (10)		$ (24)	$ (35)		$ (161)		$ (145)		$ (46)
Included in earnings	4	[1]	2	[2]	54	[1]	30	[2]			(1)	2	(1)		(1)	9	3		4	(2)	12	4			7		6	31	17		(1)	[3]	(1)	[4]	(2)	[3]	(1)	[4]			1		(1)	(1)	(3)	(2)				1												1	[5]	(2)	[6]	(1)	[6]	(2)	[6]	6	[5]		5	[5]	1	[7]	5	[8]			5	[8]	48	119	[5]	84	211	[5]	1		1
OCI			106				121																106	[9]	121	[9]					(7)		16		10		25			(2)		(2)	(7)	17	9	34		1	1	(7)																																							6	[10]	(10)	[10]	46	[9]
Sales					(57)							(5)				(31)												(21)																																		(12)										(14)
Purchases, sales, issuances, settlements, maturities paydowns, net			(71)				(116)		3	2	(1)		(2)		(2)		(6)			(23)		(35)					(48)		(75)				(25)				(38)			(4)		(5)		(20)		(45)		(1)		12														(2)				(2)		(51)			(70)				(12)				(25)			6			6
Settlements	(47)				(124)							(1)							(47)		(122)							(1)			(118)				(144)				(5)		(7)		(19)		(42)		(1)		(2)								(93)	(93)														(1)			(11)				(34)				6			6
Transfers to/from other balance sheet line items					(20)																							(20)																																		(7)				(4)				(6)		2	4		2		(4)		(9)		(17)		(40)	(62)		(54)	(129)
Transfers into Level 3																																																														5								4		16	24
Transfers out of Level 3																																																														(1)								(1)		(2)	(1)								(1)
Fair value, ending balance	62		425		62		425		9	9	3	2	3	2	48	5	48	5	13	120	13	120	128		128		117	42	117	42	1,000		1,308		1,000		1,308		68	125	68	125	311	365	311	365	19	108	19	108	5	5	5	5	5	5	597	597	705	705	705	3		5				5		104		3	104		449		411		449		411		12	53		12	53		(154)		(154)
Change in unrealized gains / (losses) included in earnings for the period related to financial assets still held at the end of period			$ (2)	[2]	$ 17	[1]	$ 11	[2]			$ (1)		$ (1)		$ (1)	$ 2	$ 1			$ (4)							$ 4	$ 15	$ 11		$ 1	[3]	$ (1)	[4]	$ (3)	[3]	$ (2)	[4]					$ 1	$ (1)	$ (3)	$ (2)																		$ (2)	[6]			$ (2)	[6]	$ 2	[5]		$ (6)	[5]	$ (1)	[7]	$ 4	[8]	$ (3)	[7]	$ 6	[8]

[1] Amounts included in earnings are recorded in trading account profits and commissions.

[2] Amounts included in earnings are recorded in trading account profits/(losses) and commissions.

[3] Amounts included in earnings are recorded in net securities gains.

[4] Amounts included in earnings are recorded in net securities gains/(losses).

[5] Amounts included in earnings are net of issuances, fair value changes, and expirations and are recorded in mortgage production related income/(loss).

[6] Amounts included in earnings are recorded in other noninterest income.

[7] Amounts are generally included in mortgage production related income/(loss), however, the mark on certain fair value loans is included in trading account profits and commissions.

[8] Amounts are generally included in mortgage production related income, however, the mark on certain fair value loans is included in trading account profits/(losses) and commissions.

[9] Amount recorded in other comprehensive income is the effective portion of the cash flow hedges related to the Company's probable forecasted sale of its shares of Coke stock as discussed in Note 10, "Derivative Financial Instruments.

[10] Amount recorded in OCI is the effective portion of the cash flow hedges related to the Company's probable forecasted sale of its shares of Coke common stock as discussed in Note 11, "Derivative Financial Instruments.