Securities (Tables)

6 Months Ended

Jun. 30, 2012

Securities [Abstract]

Amortized cost, gross unrealized gains, gross unrealized losses, and fair value of securities available for sale

	June 30, 2012
(Dollars in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government sponsored agencies	$	5,393	$	66	$	—	$	5,459
Residential mortgage-backed securities:
U.S. government and government sponsored agencies		11,125		213		1		11,337
Privately issued		653		4		34		623
Commercial mortgage-backed securities		1,503		53		2		1,554
Other debt securities		1,480		11		5		1,486
Equity securities		86		—		—		86
Total securities available for sale	$	20,240	$	347	$	42	$	20,545

	December 31, 2011
(Dollars in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government sponsored agencies	$	6,943	$	54	$	—	$	6,997
Residential mortgage-backed securities:
U.S. government and government sponsored agencies		13,307		182		4		13,485
Privately issued		800		1		63		738
Commercial mortgage-backed securities		1,032		29		1		1,060
Other debt securities		463		11		2		472
Equity securities		81		—		—		81
Total securities available for sale	$	22,626	$	277	$	70	$	22,833

Securities available for sale, fair value and unrealized losses

	June 30, 2012
	Less than 12 months				12 months or more				Total
(Dollars in millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Residential mortgage-backed securities:
U.S. government and government sponsored agencies	$	232	$	1	$	25	$	—	$	257	$	1
Privately issued		87		1		247		33		334		34
Commercial mortgage-backed securities		123		—		19		2		142		2
Other debt securities		76		4		23		1		99		5
Total securities available for sale	$	518	$	6	$	314	$	36	$	832	$	42

	December 31, 2011
	Less than 12 months				12 months or more				Total
(Dollars in millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Residential mortgage-backed securities:
U.S. government and government sponsored agencies	$	1,106	$	4	$	59	$	—	$	1,165	$	4
Privately issued		551		23		99		40		650		63
Commercial mortgage-backed securities		95		1		—		—		95		1
Other debt securities		23		2		3		—		26		2
Total securities available for sale	$	1,775	$	30	$	161	$	40	$	1,936	$	70

Amortized cost and fair value of debt securities available for sale by contractual maturity

	June 30, 2012
(Dollars in millions)	Amortized Cost		Fair Value
Due in one year or less	$	1,539	$	1,547
Due after one year through five years		4,498		4,564
Due after five years through ten years		780		800
Due after ten years		13,337		13,548
Total debt securities available for sale	$	20,154	$	20,459

Proceeds from sales of securities available for sale and gross realized gains

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
(Dollars in millions)	2012		2011		2012		2011
Proceeds from sales	$	2,873	$	1,918	$	4,124	$	3,831
Gross realized gains		30		29		49		58
Gross realized losses		1		—		1		—

Amortized cost, gross unrealized gains and losses recognized in other comprehensive income, carrying amount, gross unrealized gains and losses not recognized in other comprehensive income, and fair values of securities held to maturity

	June 30, 2012
			Recognized in OCI						Not Recognized in OCI
(Dollars in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Collateralized loan obligations (CLOs)	$	1,609	$	—	$	343	$	1,266	$	191	$	2	$	1,455
U.S. government and government sponsored agencies—residential mortgage backed securities		1,074		5		—		1,079		3		1		1,081
Total securities held to maturity	$	2,683	$	5	$	343	$	2,345	$	194	$	3	$	2,536

	December 31, 2011
			Recognized in OCI						Not Recognized in OCI
(Dollars in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Carrying Amount		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
CLOs	$	1,653	$	—	$	380	$	1,273	$	159	$	3	$	1,429

Securities held to maturity with continuous unrealized loss position

	June 30, 2012
	Less than 12 months						12 months or more						Total
			Unrealized Losses						Unrealized Losses						Unrealized Losses
(Dollars in millions)	Fair Value		Recognized in OCI		Not Recognized in OCI		Fair Value		Recognized in OCI		Not Recognized in OCI		Fair Value		Recognized in OCI		Not Recognized in OCI
CLOs	$	—	$	—	$	—	$	1,447	$	343	$	2	$	1,447	$	343	$	2
U.S. government and government sponsored agencies—residential mortgage backed securities		449		—		1		—		—		—		449		—		1
Total securities held to maturity	$	449	$	—	$	1	$	1,447	$	343	$	2	$	1,896	$	343	$	3

	December 31, 2011
	Less than 12 months						12 months or more						Total
			Unrealized Losses						Unrealized Losses						Unrealized Losses
(Dollars in millions)	Fair Value		Recognized in OCI		Not Recognized in OCI		Fair Value		Recognized in OCI		Not Recognized in OCI		Fair Value		Recognized in OCI		Not Recognized in OCI
CLOs	$	—	$	—	$	—	$	1,420	$	380	$	3	$	1,420	$	380	$	3

Amortized cost, fair value and carrying amount of securities held to maturity by contractual maturity

	June 30, 2012
(Dollars in millions)	Amortized Cost		Carrying Amount		Fair Value
Due in one year or less	$	1	$	—	$	1
Due after one year through five years		599		500		575
Due after five years through ten years		988		751		863
Due after ten years		1,095		1,094		1,097
Total securities held to maturity	$	2,683	$	2,345	$	2,536