Debt and Credit Facility (Details 1) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Mar. 29, 2014
Debt Instrument [Line Items]
Amortization of Debt Discount (Premium)			$ 6,008,000	$ 8,073,000
Line of Credit Facility, Expiration Date	Dec. 31, 2016
Line of Credit Facility, Maximum Borrowing Capacity	250,000,000		250,000,000
Line of Credit Facility, Average Outstanding Amount	0
2019 and 2021 Notes Payable [Member]
Debt Instrument [Line Items]
Interest Expense, Debt, Excluding Amortization	6,406,000	0	12,813,000	0
Amortization of Financing Costs	134,000	0	290,000	0
Amortization of Debt Discount (Premium)	242,000	0	482,000	0
Interest Expense, Debt	6,782,000	0	13,585,000	0
Proceeds from Issuance of Long-term Debt					990,100,000
Two And One Two Five Percent 2019 Senior Debentures [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	500,000,000		500,000,000		500,000,000
Debt Instrument, Unamortized Discount	$ 2,324,000		$ 2,324,000		$ 2,574,000