Debt Table (Details) - USD ($) $ in Thousands	Nov. 29, 2015	Apr. 27, 2015	Nov. 30, 2014	Mar. 14, 2013	May. 08, 2012
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 1,004,938		$ 1,078,100
Short-term debt	114,978		131,524
Long-term Debt, Current Maturities	32,625		0
Short-term debt and current maturities of long-term debt	147,603		131,524
Long-term and short-term debt	1,152,541		1,209,624
Unsecured: [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 1,004,938		1,078,100
4.25% Yen-denominated Eurobonds due 2016 [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Stated interest rate	4.25%
4.25% Yen-denominated Eurobonds due 2016 [Member] | Bonds [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 0		33,964
Long-term Debt, Current Maturities	$ 32,625		0
Stated interest rate	4.25%
7.625% senior notes due 2020 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 0		518,750
Stated interest rate	7.625%
6.875% senior notes due 2022 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 524,807		525,386
Stated interest rate	6.875%			6.875%	6.875%
5.00% Senior Notes, Due 2025 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term Debt, Excluding Current Maturities	$ 480,131		0
Stated interest rate	5.00%	5.00%
Senior revolving credit facility [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Short-term debt	$ 99,000		100,000
Short-term borrowings [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Short-term debt	$ 15,978		$ 31,524