Summary Of Significant Accounting Policies (Schedule Of Other Income (Expense), Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Income Expense Net [line Items]
Foreign currency transaction and hedge losses, net		$ (43)	$ (22)	$ (54)
Loss on retirement of debt	(30)		(30)
Net realized losses of available-for-sale securities			(2)	(2)
Net loss (income) attributable to noncontrolling interests		3	2	(6)
Other nonoperating expense		(61)	(29)	1
Total		118	184	171
Samsung Corning Precision Materials Co., Ltd. [Member]
Other Income Expense Net [line Items]
Royalty income from affiliated companies		$ 219	$ 265	$ 232