Long-Term Debt (Components Of Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 26, 2013	May 27, 2012
Debt Instruments [Line Items]
Total long-term debt	$ 2,500.0	$ 1,805.9
Fair value hedge	1.9	3.2
Less issuance discount	(5.7)	(5.5)
Total long-term debt less issuance discount	2,496.2	1,803.6
Less current portion	0	(349.9)
Long-term debt, excluding current portion	2,496.2	1,453.7
5.625% senior notes due October 2012
Debt Instruments [Line Items]
Total long-term debt	0	350.0
Debt instrument, interest rate, stated percentage (percentage)	5.625%
Maturity date of debt	Oct. 01, 2012
7.125% debentures due February 2016
Debt Instruments [Line Items]
Total long-term debt	100.0	100.0
Debt instrument, interest rate, stated percentage (percentage)	7.125%
Maturity date of debt	Feb. 01, 2016
Variable-rate term loan (1.44% at May 26, 2013) due August 2017
Debt Instruments [Line Items]
Total long-term debt	300.0	0
Debt instrument, interest rate, stated percentage (percentage)	1.44%
Maturity date of debt	Aug. 01, 2017
6.200% senior notes due October 2017
Debt Instruments [Line Items]
Total long-term debt	500.0	500.0
Debt instrument, interest rate, stated percentage (percentage)	6.20%
Maturity date of debt	Oct. 01, 2017
3.790% senior notes due August 2019
Debt Instruments [Line Items]
Total long-term debt	80.0	0
Debt instrument, interest rate, stated percentage (percentage)	3.79%
Maturity date of debt	Aug. 01, 2019
4.500% senior notes due October 2021
Debt Instruments [Line Items]
Total long-term debt	400.0	400.0
Debt instrument, interest rate, stated percentage (percentage)	4.50%
Maturity date of debt	Oct. 01, 2021
3.350% senior notes due November 2022
Debt Instruments [Line Items]
Total long-term debt	450.0	0
Debt instrument, interest rate, stated percentage (percentage)	3.35%
Maturity date of debt	Nov. 01, 2022
4.520% senior notes due August 2024
Debt Instruments [Line Items]
Total long-term debt	220.0	0
Debt instrument, interest rate, stated percentage (percentage)	4.25%
Maturity date of debt	Aug. 01, 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. 01, 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. 01, 2037
ESOP loan
Debt Instruments [Line Items]
Total long-term debt	$ 0	$ 5.9

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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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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