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Long-term Debt - Senior Unsecured, Secured Notes and NALP Notes (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 24, 2016
Sep. 10, 2016
Feb. 24, 2018
Feb. 25, 2017
Feb. 27, 2016
Aug. 09, 2016
May 31, 2016
Feb. 09, 2015
Oct. 23, 2014
Debt Instrument [Line Items]                  
Make-whole premium in debt extinguishment     $ 0 $ 87,700,000 $ 0        
Loss on debt extinguishment   $ 111,700,000 (4,700,000) 111,700,000 $ 0        
Book value of debt     11,011,200,000 $ 11,383,900,000          
Senior notes | Senior Secured Notes, Maturity 2022                  
Debt Instrument [Line Items]                  
Repurchase amount of debt $ 609,600,000             $ 535,400,000  
Make-whole premium in debt extinguishment 87,700,000                
Loss on debt extinguishment 111,700,000                
Write off of deferred financing costs on previous loans $ 24,000,000                
Senior notes | NALP Notes                  
Debt Instrument [Line Items]                  
Repurchase amount of debt     135,500,000            
Loss on debt extinguishment     (4,700,000)            
Par value of note repurchased     160,000,000            
Book value of debt     140,200,000            
Interest paid     $ 3,700,000            
Senior notes | Senior Unsecured Notes, Maturity 2024                  
Debt Instrument [Line Items]                  
Face amount of debt instrument             $ 1,250,000,000    
Stated interest rate     6.625%       6.625%    
Senior notes | Senior Unsecured Notes, Maturity 2025                  
Debt Instrument [Line Items]                  
Face amount of debt instrument           $ 1,250,000,000      
Stated interest rate     5.75%     5.75%      
Senior notes | Senior Secured Notes, Maturity 2022                  
Debt Instrument [Line Items]                  
Face amount of debt instrument                 $ 1,145,000,000.0
Stated interest rate                 7.75%