Bank Borrowings And Long-Term Debt (New Term Loan Agreement And Revolving Line Of Credit) (Details) (USD $)	0 Months Ended		12 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended
	Sep. 27, 2010	Aug. 02, 2010	Mar. 31, 2012	Mar. 31, 2011	Feb. 17, 2011	Sep. 28, 2010	Mar. 31, 2008	Feb. 17, 2011 Term Loan Facility Maturing On February 17, 2014 [Member]	Mar. 31, 2012 Term Loan Agreement Maturing On September 27, 2013 [Member]	Sep. 27, 2010 Term Loan Agreement Maturing On September 27, 2013 [Member]	Mar. 31, 2012 Term Loan Facility Maturing On September 28, 2013 [Member]	Sep. 28, 2010 Term Loan Facility Maturing On September 28, 2013 [Member]	Mar. 31, 2012 Term Loan Facility Maturing On February 17, 2014 [Member]	Oct. 19, 2011 New Credit Facility [Member] Y	Mar. 31, 2012 New Revolving Credit Facility [Member]	Oct. 19, 2011 New Revolving Credit Facility [Member]	Oct. 19, 2011 New Term Loan Facility [Member]	Aug. 31, 2010 1% Convertible Subordinated Notes [Member]	Mar. 19, 2010 6.5% Senior Subordinated Notes [Member]	Mar. 19, 2010 6.5% Senior Subordinated Notes [Member]	Jun. 30, 2009 6.5% Senior Subordinated Notes [Member]	Mar. 31, 2010 6.5% Senior Subordinated Notes [Member]	Dec. 31, 2010 6.25% Senior Subordinated Notes [Member]	Jun. 30, 2009 6.25% Senior Subordinated Notes [Member]	Mar. 31, 2011 6.25% Senior Subordinated Notes [Member]	Mar. 31, 2010 6.25% Senior Subordinated Notes [Member]	Oct. 01, 2007 Previous Term Loan Facility [Member]	Oct. 19, 2011 Minimum [Member] New Credit Facility [Member]	Oct. 19, 2011 Minimum [Member] New Revolving Credit Facility [Member]	Oct. 19, 2011 Maximum [Member] New Credit Facility [Member]	Oct. 19, 2011 Maximum [Member] New Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility			$ 2,000,000,000											$ 2,000,000,000		$ 1,500,000,000											$ 1,800,000,000
Long-term debt maturities, number of years														5
New term loan facility																	500,000,000
Credit facility, expiration date																	October 2016
Borrowings outstanding			140,000,000	160,000,000			1,700,000,000
Debt instrument, maturity date									Sep. 27, 2013		Sep. 28, 2013		Feb. 17, 2014
Line of credit facility, interest rate															(i) LIBOR plus the applicable margin for LIBOR loans ranging between 1.25% and 2.25%, based on the Company's credit ratings or (ii) the base rate (the greatest of the agent's prime rate, the federal funds rate plus 0.50% and LIBOR for a one-month interest period plus 1.00%) plus an applicable margin ranging between 0.25% and 1.25%, based on the Company's credit rating.
Debt instrument interest percentage		1.00%																1.00%			6.50%				6.25%
Line of credit facility LIBOR rate plus applicable margin rate																												1.25%		2.25%
Line of credit facility base rate over federal funds rate														0.50%
Debt instrument, basis spread on variable rate														1.00%														0.25%		1.25%
Percentage of quarterly commitment fee, per annum																													0.20%		0.45%
Uncommitted revolving credit facilities, lines of credit and other loans			290,600,000
Borrowings outstanding				1,600,000
Amount paid for redemption of Convertible Subordinated Notes		240,000,000																240,000,000		306,300,000	101,800,000		308,500,000	101,300,000
Aggregate principal balance of Convertible Subordinated Notes redeemed																				299,800,000	99,800,000		302,200,000	99,900,000
Redemption price as a percentage of principal amount																			102.167%				102.083%
Cash paid for consent fees																					2,300,000
Loss associated with partial extinguishment of debt																						(2,300,000)
Transaction costs associated with partial extinguishment of debt																						2,600,000
Loss associated with redemption of notes																						(10,500,000)			(13,200,000)	2,300,000
Write-off of unamortized debt issuance costs																						4,000,000			6,900,000	2,700,000
Consent fees paid																								6,500,000
Debt instrument premium on redemption price																						6,500,000			6,300,000
Asia Term Loans			377,000,000	379,000,000				200,000,000		50,000,000		130,000,000
Debt instrument, description of variable rate basis			LIBOR
Percentage of quarterly amortization of term loan, per annum	1.00%		1.00%
Principal payments due quarterly	500,000
Debt instrument, fee amount					$ 1,000,000	$ 1,400,000