Debt and Credit Facility (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 27, 2015	Mar. 29, 2014	Mar. 28, 2015
Debt Instrument [Line Items]
2019 Debt instrument, Maturity Date	Mar. 15, 2019
2021 Debt instrument, Maturity Date	Mar. 15, 2021
Long-term Debt, Excluding Current Maturities	$ 995,086		$ 994,839	[1]
2.625% Senior Convertible Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument Carrying Amount Of Liability Component			576,053
Two And One Two Five Percent 2019 Senior Debentures [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Long-term Debt		$ 990,100
3.0% 2021 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	500,000		500,000
Debt Instrument, Unamortized Discount	$ (2,968)		(3,088)
Discount Percent of Par	99.281%
2.125% 2019 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000		500,000
Debt Instrument, Unamortized Discount	$ (1,946)		(2,073)
Discount Percent of Par	99.477%
2.625% Senior Convertible Debentures [Member]
Debt Instrument [Line Items]
Price Per Share To Be Purchase By Company Under Call Option	$ 29.26
Debt Instrument, Face Amount	$ 600,000		600,000
Debt Instrument, Unamortized Discount	(29,793)		(33,679)
Debt Instrument Carrying Amount Of Liability Component	578,816
Equity component - net carrying value	$ 66,415		$ 66,415

[1] Derived from audited financial statements