The following table summarizes the changes in the allowance for credit losses by product and the related loan balance by product during the three months ended March 31, 2013 and 2012:



	Commercial												Consumer
	Construction and Other Real Estate			Business and Corporate Banking			Global Banking			Other Comm’l			Residential Mortgage, Excl Home Equity Mortgages			Home Equity Mortgages			Credit Card			Other Consumer			Total
	(in millions)
Three Months Ended March 31, 2013
Allowance for credit losses – beginning of period	$	162		$	97		$	41		$	17		$	210		$	45		$	55		$	20		$	647
Provision charged to income	9			2			(1		)	—			(3		)	17			(2		)	(1		)	21
Charge offs	(58		)	(6		)	—			—			(16		)	(12		)	(12		)	(6		)	(110		)
Recoveries	3			3			—			—			1			—			1			2			10
Net charge offs	(55		)	(3		)	—			—			(15		)	(12		)	(11		)	(4		)	(100		)
Allowance for credit losses – end of period	$	116		$	96		$	40		$	17		$	192		$	50		$	42		$	15		$	568
Ending balance: collectively evaluated for impairment	$	89		$	88		$	40		$	17		$	115		$	47		$	37		$	15		$	448
Ending balance: individually evaluated for impairment	27			8			—			—			77			3			5			—			120
Total allowance for credit losses	$	116		$	96		$	40		$	17		$	192		$	50		$	42		$	15		$	568

Loans:
Collectively evaluated for impairment	$	7,926		$	12,678		$	19,700		$	2,803		$	13,962		$	2,215		$	736		$	578		$	60,598
Individually evaluated for impairment⁽¹⁾	393			47			18			74			216			21			13			—			782
Loans carried at lower of amortized cost or fair value less cost to sell	—			—			—			—			1,552			—			—			—			1,552
Total loans	$	8,319		$	12,725		$	19,718		$	2,877		$	15,730		$	2,236		$	749		$	578		$	62,932

Three Months Ended March 31, 2012
Allowance for credit losses – beginning of period	$	212		$	78		$	131		$	21		$	192		$	52		$	39		$	18		$	743
Provision charged to income	(20		)	6			(22		)	(2		)	15			8			11			4			—
Charge offs	(1		)	(10		)	(84		)	—			(26		)	(17		)	(17		)	(7		)	(162		)
Recoveries	14			2			—			1			1			—			2			2			22
Net charge offs	13			(8		)	(84		)	1			(25		)	(17		)	(15		)	(5		)	(140		)
Allowance for credit losses – end of period	$	205		$	76		$	25		$	20		$	182		$	43		$	35		$	17		$	603
Ending balance: collectively evaluated for impairment	$	95		$	64		$	25		$	20		$	95		$	39		$	29		$	17		$	384
Ending balance: individually evaluated for impairment	110			12			—			—			87			4			6			—			219
Total allowance for credit losses	$	205		$	76		$	25		$	20		$	182		$	43		$	35		$	17		$	603



Loans:
Collectively evaluated for impairment	$	7,122	$	10,750	$	13,834	$	2,962	$	12,990	$	2,477	$	767	$	679	$	51,581
Individually evaluated for impairment⁽¹⁾	655		139		18		89		596		14		19		—		1,530
Loans carried at lower of amortized cost or fair value less cost to sell	—		—		—		—		758		—		—		—		758
Total loans	$	7,777	$	10,889	$	13,852	$	3,051	$	14,344	$	2,491	$	786	$	679	$	53,869

⁽¹⁾

For consumer loans, these amounts represent TDR Loans for which we evaluate reserves using a discounted cash flow methodology. Each loan is individually identified as a TDR Loan and then grouped together with other TDR Loans with similar characteristics. The discounted cash flow analysis is then applied to these groups of TDR Loans. The loan balance above excludes TDR loans that are carried at the lower of amortized cost or fair value of the collateral less cost to sell which totaled $632 million and $445 million at March 31, 2013 and 2012, respectively.