Restructuring Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Severance Costs	$ 2	$ 1
Other Restructuring Costs	0	1
Total restructuring reserve	15		20
Restructuring Reserve, Settled with Cash	7
Expected Restructuring Payments Remainder of Current Year	4
Restructuring Payments Due in Two Years	3
Restructuring Payments Due Thereafter	$ 8