Other Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Other Liabilities [Line Items]
Payment for product liability under settlement agreement - within one year	$ 100
Payment for product liability under settlement agreement - year two	50
Payment for product liability under settlement agreement - year three	50
Payment for product liability under settlement agreement - year four	50
Payment for product liability under settlement agreement - year five	50
Payment for product liability under settlement agreement - year six	50
Time period for undiscounted projection of claims and related legal fees, years	20 years
Long-term purchase and supply agreements, years	6 years
First Payment [Member]
Other Liabilities [Line Items]
Reduction in payment for asbestos liability	(30)
Second And Fourth Payments [Member]
Other Liabilities [Line Items]
Reduction in payment for asbestos liability	(15)
Asbestos Litigation [Member]
Other Liabilities [Line Items]
Number of other cases currently involved alleging injuries from asbestos and similar amounts of monetary damages per case	9,800
Asbestos Litigation [Member] | Corning Inc. [Member]
Other Liabilities [Line Items]
Additional accrual for non-PCC asbestos claims	$ 150