Valuation Accounts And Reserves

12 Months Ended

Dec. 31, 2012

Valuation Accounts And Reserves [Abstract]

Valuation Accounts And Reserves

Corning Incorporated and Subsidiary Companies

Schedule II – Valuation Accounts and Reserves

(in millions)

Year ended December 31, 2012	Balance at beginning of period		Additions		Net deductions and other		Balance at end of period
Doubtful accounts and allowances	$	19	$	7			$	26
Deferred tax assets valuation allowance	$	219			$	9	$	210
Accumulated amortization of purchased intangible assets	$	135	$	19			$	154
Reserves for accrued costs of business restructuring	$	10	$	52	$	20	$	42
Year ended December 31, 2011	Balance at beginning of period		Additions		Net deductions and other		Balance at end of period
Doubtful accounts and allowances	$	20			$	1	$	19
Deferred tax assets valuation allowance	$	214	$	15	$	10	$	219
Accumulated amortization of purchased intangible assets	$	221	$	15	$	101	$	135
Reserves for accrued costs of business restructuring	$	27			$	17	$	10
Year ended December 31, 2010	Balance at beginning of period		Additions		Net deductions and other		Balance at end of period
Doubtful accounts and allowances	$	20					$	20
Deferred tax assets valuation allowance	$	245			$	31	$	214
Accumulated amortization of purchased intangible assets	$	217	$	4			$	221
Reserves for accrued costs of business restructuring	$	100			$	73	$	27