Restructuring (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2011
Restructuring liability
Restructuring reserves as of December 31, 2010			$ 66,400,000
Expense			17,600,000
Payments			(83,900,000)
Adjustments to previous estimates, net			(2,900,000)
Other adjustments			5,400,000
Restructuring reserves as of September 30, 2011	2,600,000	66,400,000	2,600,000
Restructuring (Textuals) [Abstract]
Total restructuring charges	1,803,000	75,200,000	18,390,000
Restructuring (Textuals) [Abstract]
Headcount reduction percentage due to consolidation of sites			13.00%
Approximate restructuring cost due to reduction in workforce and closing and consolidation of certain leased and owned facilities			100,000,000
Workforce reduction [Member]
Restructuring liability
Restructuring reserves as of December 31, 2010			60,600,000
Expense			15,200,000
Payments			(80,800,000)
Adjustments to previous estimates, net			(2,900,000)
Other adjustments			8,600,000
Restructuring reserves as of September 30, 2011	700,000		700,000
Restructuring (Textuals) [Abstract]
Total restructuring charges	1,800,000		12,300,000
Facility consolidation [Member]
Restructuring liability
Restructuring reserves as of December 31, 2010			5,800,000
Expense			2,400,000
Payments			(3,100,000)
Other adjustments			(3,200,000)
Restructuring reserves as of September 30, 2011	1,900,000		1,900,000
Restructuring depreciation [Member]
Restructuring (Textuals) [Abstract]
Total restructuring charges			$ 6,100,000