Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 3,196	[1]	$ 3,243	[1]
Loans Receivable, Fair Value Disclosure	339	[2]	379	[2]
Servicing Asset at Fair Value, Amount	1,199		899
Deposits, Fair Value Disclosure	793		832
Long-term Debt, Fair Value	1,594	[3]	1,622	[3]
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(5,824)		(6,049)
Trading Liabilities, Fair Value Disclosure	1,176		1,161
Netting [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(530)	[4]	(730)	[4]
Other Assets, Fair Value Disclosure	151	[4]
Trading Liabilities, Fair Value Disclosure	951	[4]	1,259	[5]
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(6,354)		(6,779)
Available-for-sale Securities, Fair Value Disclosure	23,389		21,953
Loans Held-for-sale, Fair Value Disclosure	3,196		3,243
Loans Receivable, Fair Value Disclosure	339		379
Servicing Asset at Fair Value, Amount	1,199		899
Other Assets, Fair Value Disclosure	252	[6]	178	[6]
Trading Liabilities, Fair Value Disclosure	2,127		2,420
Deposits, Fair Value Disclosure	793		832
Long-term Debt, Fair Value	1,594		1,622
Other Liabilities, Fair Value Disclosure	164	[6],[7]	46	[6],[7]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(555)		(394)
Available-for-sale Securities, Fair Value Disclosure	915		291
Loans Held-for-sale, Fair Value Disclosure	0		0
Loans Receivable, Fair Value Disclosure	0		0
Servicing Asset at Fair Value, Amount	0		0
Other Assets, Fair Value Disclosure	2		2
Trading Liabilities, Fair Value Disclosure	467		591
Deposits, Fair Value Disclosure	0		0
Long-term Debt, Fair Value	0		0
Other Liabilities, Fair Value Disclosure	0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(5,730)		(6,327)
Available-for-sale Securities, Fair Value Disclosure	21,495		20,748
Loans Held-for-sale, Fair Value Disclosure	3,188		3,235
Loans Receivable, Fair Value Disclosure	0		0
Servicing Asset at Fair Value, Amount	0		0
Other Assets, Fair Value Disclosure	227	[6]	44	[6]
Trading Liabilities, Fair Value Disclosure	1,660		1,829
Deposits, Fair Value Disclosure	793		832
Long-term Debt, Fair Value	1,594		1,622
Other Liabilities, Fair Value Disclosure	60	[6],[7]	15	[6],[7]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(69)		(58)
Available-for-sale Securities, Fair Value Disclosure	979		914
Loans Held-for-sale, Fair Value Disclosure	8		8
Loans Receivable, Fair Value Disclosure	339		379
Servicing Asset at Fair Value, Amount	1,199		899
Other Assets, Fair Value Disclosure	23	[6]	132	[6]
Trading Liabilities, Fair Value Disclosure	0		0
Deposits, Fair Value Disclosure	0		0
Long-term Debt, Fair Value	0		0
Other Liabilities, Fair Value Disclosure	104	[6],[7]	31	[6],[7]
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure	1,411		1,656
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(2,264)		(2,319)
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(2,264)		(2,319)
Trading Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Equity Securities | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(102)		(100)
Available-for-sale Securities, Fair Value Disclosure	874	[8]	702	[8]
Trading Liabilities, Fair Value Disclosure	5		9
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(102)		(100)
Available-for-sale Securities, Fair Value Disclosure	137	[8]	69	[8]
Trading Liabilities, Fair Value Disclosure	5		9
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0		0
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	737	[8]	633	[8]
Trading Liabilities, Fair Value Disclosure	0		0
Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(1,977)		(2,635)
Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(232)		(183)
Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(1,745)		(2,452)
Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(84)		(28)
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(84)		(28)
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(540)		(567)
Available-for-sale Securities, Fair Value Disclosure	40		46
Trading Liabilities, Fair Value Disclosure	246		173
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0		0
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(540)		(566)
Available-for-sale Securities, Fair Value Disclosure	38		41
Trading Liabilities, Fair Value Disclosure	246		173
Other Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		(1)
Available-for-sale Securities, Fair Value Disclosure	2		5
Trading Liabilities, Fair Value Disclosure	0		0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(6)		(36)
Available-for-sale Securities, Fair Value Disclosure	125		216
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		(31)
Available-for-sale Securities, Fair Value Disclosure	103		195
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(6)		(5)
Available-for-sale Securities, Fair Value Disclosure	22		21
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(65)		(55)
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(2)		(3)
Collateralized Debt Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(63)		(52)
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	181		209
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
Mortgage-backed Securities, Issued by Private Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	181		209
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(511)		(432)
Available-for-sale Securities, Fair Value Disclosure	18,913		18,169
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(511)		(432)
Available-for-sale Securities, Fair Value Disclosure	18,913		18,169
Trading Liabilities, Fair Value Disclosure	5
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(26)		(34)
Available-for-sale Securities, Fair Value Disclosure	256		320
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(26)		(34)
Available-for-sale Securities, Fair Value Disclosure	219		274
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	37		46
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(558)		(462)
Available-for-sale Securities, Fair Value Disclosure	2,222		2,069
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(558)		(462)
Available-for-sale Securities, Fair Value Disclosure	2,222		2,069
US Government Agencies Debt Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(221)		(111)
Available-for-sale Securities, Fair Value Disclosure	778		222
Trading Liabilities, Fair Value Disclosure	460		582
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	(221)		(111)
Available-for-sale Securities, Fair Value Disclosure	778		222
Trading Liabilities, Fair Value Disclosure	460		582
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0		0
US Treasury Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Account Assets, Fair Value Disclosure	0		0
Available-for-sale Securities, Fair Value Disclosure	0		0
Trading Liabilities, Fair Value Disclosure	0		0
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure	2		0
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure	1,409		1,656
Derivative Financial Instruments, Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure	0		0
Corporate and Other [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	286		319
Corporate and Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0		0
Corporate and Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	286		319
Corporate and Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0		0
Residential Mortgage, Loans Held For Sale [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	2,910		2,924
Residential Mortgage, Loans Held For Sale [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0		0
Residential Mortgage, Loans Held For Sale [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	2,902		2,916
Residential Mortgage, Loans Held For Sale [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	8		8
Other Assets [Member] | Derivative Financial Instruments, Assets | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Assets, Fair Value Disclosure	101
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Liabilities, Fair Value Disclosure	135	[6],[7]	15	[6],[7]
Estimate of Fair Value, Fair Value Disclosure [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Liabilities, Fair Value Disclosure	$ 5

[1] 1 Includes loans held for sale, at fair value, of consolidated VIEs$289 $319

[2] 2 Includes loans of consolidated VIEs345 365

[3] 3 Includes debt of consolidated VIEs ($285 and $286 at fair value at June 30, 2013 and December 31, 2012, respectively)645 666

[4] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets at June 30, 2013.

[5] Amount represents the cash collateral received from or deposited with derivative counterparties. Amount is offset with derivatives in the Consolidated Balance Sheets at December 31, 2012.

[6] These amounts include IRLCs and derivative financial instruments entered into by the Mortgage segment to hedge its interest rate risk.

[7] These amounts include the derivative associated with the Company's sale of Visa shares during the year ended December 31, 2009, certain CDS, and contingent consideration obligations related to acquisitions.

[8] Includes $334 million of FHLB of Atlanta stock, $402 million of Federal Reserve Bank stock, $137 million in mutual fund investments, and $1 million of other equity securities.