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Long-Term Debt (Narrative) (Details) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
May 27, 2012
May 29, 2011
May 30, 2010
May 27, 2012
Senior Notes
adjustments
Jun. 18, 2012
Senior Notes
Issuance of Debt
May 27, 2012
Prior Revolving Credit Agreement
Sub Limit
May 27, 2012
Prior Revolving Credit Agreement
Revolving Credit Facility
May 27, 2012
New Revolving Credit Agreement
May 27, 2012
New Revolving Credit Agreement
Letters of Credit
May 27, 2012
New Revolving Credit Agreement
Commercial Paper
May 27, 2012
New Revolving Credit Agreement
Sub Limit
May 27, 2012
New Revolving Credit Agreement
Revolving Credit Facility
Oct. 11, 2011
4.500% Senior Notes Due October 2021
Senior Notes
May 27, 2012
4.500% Senior Notes Due October 2021
Senior Notes
May 27, 2012
5.625% Senior Notes Due October 2012
Senior Notes
May 27, 2012
6.200 Percent Senior Notes Due October 2017
Senior Notes
May 27, 2012
6.800% Senior Notes Due October 2037
Senior Notes
Jun. 18, 2012
3.790% Senior Notes Due August 2019
Senior Notes
Issuance of Debt
Jun. 18, 2012
4.520% Senior Notes Due August 2024
Senior Notes
Issuance of Debt
May 27, 2012
Libor
New Revolving Credit Agreement
Revolving Credit Facility
May 27, 2012
Base Rate Loans
New Revolving Credit Agreement
Revolving Credit Facility
May 27, 2012
Minimum
New Revolving Credit Agreement
May 27, 2012
Maximum
Senior Notes
May 27, 2012
Maximum
New Revolving Credit Agreement
Maximum borrowing available under the credit facility             $ 750,000,000         $ 750,000,000                        
Total debt to total capitalization ratio             0.75         0.75                        
Line of credit facility, sub-limit amount           150,000,000         150,000,000 1,000,000,000                        
Expiration date of credit facility             September 20, 2012 October 3, 2016                                
Increase in credit facility                       250,000,000                        
Base interest rate percentage of revolving credit facility in addition to federal funds rate (percentage)                       0.50%                        
Applicable interest rate assuming a BBB equivalent credit rating level (percentage)                                       1.075% 0.075%      
Maximum amount of borrowings resulting in fluctuation of LIBOR or base rate                       200,000,000                        
New Revolving Credit Agreement, unused capacity, commitment fee percentage (percentage)                                           0.125%   0.25%
Amount outstanding under credit facility                 70,900,000 262,700,000   0                        
Remaining credit available               416,400,000                                
Face amount of debt                         400,000,000 400,000,000 350,000,000 500,000,000 300,000,000 80,000,000 220,000,000          
Interest rate of debt (percentage)                         4.50% 4.50% 5.625% 6.20% 6.80% 3.79% 4.52%          
Payments of debt issuance costs $ 5,100,000 $ 0 $ 0                   $ 5,100,000                      
Percent of principal amount required to purchase new senior notes in event of control triggering event (percentage)                         101.00%                      
Maturity date of debt                           Oct. 01, 2021 Oct. 01, 2012 Oct. 01, 2017 Oct. 01, 2037 Aug. 01, 2019 Aug. 01, 2024          
Maximum range of interest rate adjustment on funds borrowed (percentage)                                             2.00%  
Adjustments made to interest rates on funds borrowed       0                                        
Percentage of maximum priority debt of consolidated tangible net worth (percentage)         20.00%