Securities Available for Sale (Tables)

						At December 31, 2012
						Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Other-than-Temporary Impairment		Fair Value
					(dollars in millions)
Debt securities available for sale:
	U.S. government and agency securities:
		U.S. Treasury securities			$	14,351	$	109	$	2	$	—	$	14,458
		U.S. agency securities				15,330		122		3		—		15,449
				Total U.S. government and agency securities		29,681		231		5		—		29,907
	Corporate and other debt:
		Commercial mortgage-backed securities:
			Agency			2,197		6		4		—		2,199
			Non-Agency			160		—		—		—		160
		Auto loan asset-backed securities				1,993		4		1		—		1,996
		Corporate bonds				2,891		13		3		—		2,901
		FFELP student loan asset-backed securities(1)				2,675		23		—		—		2,698
				Total Corporate and other debt		9,916		46		8		—		9,954
Total debt securities available for sale						39,597		277		13		—		39,861
Equity securities available for sale						15		—		7		—		8
Total					$	39,612	$	277	$	20	$	—	$	39,869


(1)	Amounts are backed by a guarantee from the U.S. Department of Education of at least 95% of the principal balance and interest on such loans.


						At December 31, 2011
						Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Other-than-Temporary Impairment		Fair Value
					(dollars in millions)
Debt securities available for sale:
	U.S. government and agency securities:
		U.S. Treasury securities			$	13,240	$	182	$	—	$	—	$	13,422
		U.S. agency securities				16,083		54		20		—		16,117
	Corporate and other debt(1)					944		—		3		—		941
Total debt securities available for sale						30,267		236		23		—		30,480
Equity securities available for sale						15		—		—		—		15
Total					$	30,282	$	236	$	23	$	—	$	30,495


(1)	Amounts represent FFELP student loan asset-backed securities, in which the loans are backed by a guarantee from the U.S. Department of Education of
	at least 95% of the principal balance and interest on such loans.

					Less than 12 Months				12 Months or Longer				Total
At December 31, 2012					Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
				(dollars in millions)
Debt securities available for sale:
	U.S. government and agency securities:
		U.S. Treasury securities		$	1,012	$	2	$	—	$	—	$	1,012	$	2
		U.S. agency securities			1,534		3		27		—		1,561		3
			Total U.S. government and agency securities		2,546		5		27		—		2,573		5
	Corporate and other debt:
		Commercial mortgage-backed securities:
			Agency		1,057		4		—		—		1,057		4
		Auto loan asset-backed securities			710		1		—		—		710		1
		Corporate bonds			934		3		—		—		934		3
			Total Corporate and other debt		2,701		8		—		—		2,701		8
Total debt securities available for sale					5,247		13		27		—		5,274		13
Equity securities available for sale					8		7		—		—		8		7
Total				$	5,255	$	20	$	27	$	—	$	5,282	$	20

					Less than 12 Months				12 Months or Longer				Total
At December 31, 2011					Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
				(dollars in millions)
Debt securities available for sale:
	U.S. government and agency securities:
		U.S. agency securities		$	6,250	$	15	$	1,492	$	5	$	7,742	$	20
	Corporate and other debt				679		3		—		—		679		3
Total				$	6,929	$	18	$	1,492	$	5	$	8,421	$	23

At December 31, 2012					Amortized Cost		Fair Value	Annualized Average Yield
				(dollars in millions)
U.S. government and agency securities:
	U.S. Treasury securities:
			Due within 1 year	$	753	$	757	0.8%
			After 1 year but through 5 years		13,492		13,592	0.7%
			After 5 years		106		109	1.5%
			Total		14,351		14,458
	U.S. agency securities:
			After 5 years		15,330		15,449	1.0%
			Total		15,330		15,449
			Total U.S. government and agency securities		29,681		29,907	0.9%

Corporate and other debt:
	Commercial mortgage-backed securities:
		Agency:
			After 1 year but through 5 years		353		354	1.0%
			After 5 years		1,844		1,845	1.3%
			Total		2,197		2,199
		Non-Agency:
			After 5 years		160		160	0.7%
			Total		160		160
	Auto loan asset-backed securities:
			After 1 year but through 5 years		1,642		1,645	0.7%
			After 5 years		351		351	0.7%
			Total		1,993		1,996
	Corporate bonds:
			Due within 1 year		153		153	0.7%
			After 1 year but through 5 years		2,589		2,599	1.1%
			After 5 years		149		149	1.2%
			Total		2,891		2,901
	FFELP student loan asset-backed securities:
			After 1 year but through 5 years		94		95	0.9%
			After 5 years		2,581		2,603	1.1%
			Total		2,675		2,698
			Total Corporate and other debt		9,916		9,954	1.0%

			Total debt securities available for sale	$	39,597	$	39,861	0.9%

		2012		2011		2010
		(dollars in millions)
Gross realized gains	$	88	$	145	$	102

Gross realized losses	$	10	$	2	$	—

Proceeds of sales of securities available for sale	$	10,398	$	17,085	$	670