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Long-Term Debt (Details) - USD ($)
3 Months Ended 9 Months Ended
Feb. 22, 2018
Feb. 25, 2018
Feb. 25, 2018
Feb. 26, 2017
May 28, 2017
Apr. 24, 2017
Debt Instrument [Line Items]            
Carrying value of long-term debt   $ 926,400,000 $ 926,400,000   $ 936,600,000  
Loss on extinguishment of debt   102,200,000 102,200,000 $ 0    
Debt retirement costs, cash portion   97,300,000 97,300,000      
Debt retirement costs, noncash portion   4,900,000 4,900,000      
Senior Notes | 3.850% senior notes due May 2027            
Debt Instrument [Line Items]            
Carrying value of long-term debt   $ 500,000,000 $ 500,000,000      
Stated interest rate   3.85% 3.85%      
Face amount of debt           $ 500,000,000.0
Senior Notes | 6.000% senior notes due August 2035            
Debt Instrument [Line Items]            
Carrying value of long-term debt   $ 96,300,000 $ 96,300,000      
Stated interest rate 6.00% 6.00% 6.00%      
Debt retirement $ 53,700,000          
Senior Notes | 6.800% senior notes due October 2037            
Debt Instrument [Line Items]            
Carrying value of long-term debt   $ 42,800,000 $ 42,800,000      
Stated interest rate 6.80% 6.80% 6.80%      
Debt retirement $ 257,200,000          
Senior Notes | 4.550% senior notes due February 2048            
Debt Instrument [Line Items]            
Carrying value of long-term debt   $ 300,000,000 $ 300,000,000      
Stated interest rate 4.55% 4.55% 4.55%      
Face amount of debt $ 300,000,000          
Discount and debt issuance costs $ 3,500,000          
Debt redemption percentage 101.00%          
Debt retirement $ 310,900,000