Restructuring (Details) (USD $)	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2010	Jun. 30, 2011	Jun. 30, 2011 Workforce reduction [Member]	Jun. 30, 2011 Workforce reduction [Member]	Jun. 30, 2011 Facility consolidation [Member]	Jun. 30, 2011 Restructuring depreciation [Member]	Jun. 30, 2011 Restructuring depreciation [Member]
Restructuring liability
Restructuring reserves as of December 31, 2010		$ 66,400,000		$ 60,600,000	$ 5,800,000
Expense		14,500,000		12,100,000	2,400,000
(Payments) receipts, net		(75,800,000)		(73,800,000)	(2,000,000)
Adjustments to previous estimates, net		(1,600,000)		(1,600,000)
Other adjustments		5,400,000		8,600,000	(3,200,000)
Restructuring reserves as of June 30, 2011	66,400,000	8,900,000	5,900,000	5,900,000	3,000,000
Restructuring (Textuals) [Abstract]
Total restructuring charges	75,200,000	16,587,000	2,700,000	10,500,000		1,500,000	6,000,000
Restructuring (Textuals) [Abstract]
Headcount reduction 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
Restructuring charges offset by net adjustments		$ 4,400,000