Debt (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	12 Months Ended
May 29, 2016	May 31, 2015
Debt Instruments [Line Items]
Total long-term debt	$ 450.0	$ 1,478.0
Fair value hedge	0.0	3.6
Less unamortized discount and issuance costs	(10.0)	(14.3)
Total long-term debt less unamortized discount and issuance costs	440.0	1,467.3
Less current portion	0.0	(15.0)
Long-term debt, excluding current portion	440.0	1,452.3
Variable-rate term loan (1.68% at May 31, 2015) due August 2017
Debt Instruments [Line Items]
Total long-term debt	$ 0.0	285.0
Debt instrument, interest rate, stated percentage (percentage)	1.68%
Maturity date of debt	Aug. 31, 2017
6.200% senior notes due October 2017
Debt Instruments [Line Items]
Total long-term debt	$ 0.0	500.0
Debt instrument, interest rate, stated percentage (percentage)	6.20%
Maturity date of debt	Oct. 31, 2017
4.500% senior notes due October 2021
Debt Instruments [Line Items]
Total long-term debt	$ 0.0	121.9
Debt instrument, interest rate, stated percentage (percentage)	4.50%
Maturity date of debt	Oct. 31, 2021
3.350% senior notes due November 2022
Debt Instruments [Line Items]
Total long-term debt	$ 0.0	111.1
Debt instrument, interest rate, stated percentage (percentage)	3.35%
Maturity date of debt	Nov. 30, 2022
4.520% senior notes due August 2024
Debt Instruments [Line Items]
Total long-term debt	$ 0.0	10.0
Debt instrument, interest rate, stated percentage (percentage)	4.52%
Maturity date of debt	Aug. 31, 2024
6.000% senior notes due August 2035
Debt Instruments [Line Items]
Total long-term debt	$ 150.0	150.0
Debt instrument, interest rate, stated percentage (percentage)	6.00%
Maturity date of debt	Aug. 31, 2035
6.800% senior notes due October 2037
Debt Instruments [Line Items]
Total long-term debt	$ 300.0	$ 300.0
Debt instrument, interest rate, stated percentage (percentage)	6.80%
Maturity date of debt	Oct. 31, 2037

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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Fair value as of the balance sheet date of all derivative liabilities designated as interest rate fair value hedging instruments.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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