Restructuring Charges (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Accrued restructuring costs incurred during 2010	$ 2,100,000	$ 13,700,000
Accrued restructuring costs incurred during 2009	27,200,000	50,600,000
Accrued restructuring costs incurred during 2009, long term obligation	12,500,000	22,200,000
Assets held for sale, restructuring activities	27,100,000	46,900,000
Restructuring charges	0	107,500,000	179,800,000
Other Restructuring Costs		200,000
Employee termination costs associated with the involuntary terminations		41,200,000	109,000,000
Number of employees involuntarily terminated		5,727	14,970
Non-cash charges for the write-down of property and equipment to estimate fair value		43,100,000	53,200,000
Other exit costs			17,600,000
Americas [Member]
Number of employees involuntarily terminated		2,740	4,832
Asia [Member]
Number of employees involuntarily terminated		2,086	7,623
Europe [Member]
Number of employees involuntarily terminated		901	2,515
Cost of Sales [Member]
Restructuring charges		92,400,000	155,100,000
Employee termination costs associated with the involuntary terminations		35,200,000	88,800,000
Non-cash charges for the write-down of property and equipment to estimate fair value		33,400,000	51,400,000
Other exit costs		23,200,000	14,900,000
Selling, General and Administrative Expenses [Member]
Restructuring charges		15,100,000	24,700,000
Facility and Equipment Lease Terminations [Member]
Other exit costs		19,800,000	12,500,000
Facility Abandonment and Refurbishment Costs [Member]
Other exit costs		$ 3,200,000	$ 5,100,000