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Debt - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 26, 2018
Sep. 27, 2017
Sep. 28, 2016
Dec. 26, 2018
Dec. 27, 2017
Jun. 27, 2018
Jun. 26, 2013
Line of Credit Facility [Line Items]              
Purchases of treasury stock   $ 41.7   $ 167.6 $ 71.8    
Line of Credit Facility, Covenant Compliance       We are currently in compliance with all financial covenants      
$1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Net Payments on revolving credit facility       $ 234.0      
Line of Credit Facility, Maximum Borrowing Capacity       1,000.0      
Line of Credit Facility, Remaining Borrowing Capacity       $ 413.7      
Debt Instrument, Description of Variable Rate Basis       One month LIBOR      
Line of Credit Facility, Interest Rate During Period       3.89%      
Repayments of Lines of Credit     $ 50.0        
$890M of the $1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Expiration Date       Sep. 12, 2021      
$110M of the $1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Expiration Date       Mar. 12, 2020      
Maximum [Member] | $1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Basis spread on variable rate       2.00%      
Minimum [Member] | $1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Basis spread on variable rate 1.70%     1.38%      
London Interbank Offered Rate (LIBOR) [Member] | $1B Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Basis spread on variable rate       2.51%      
5.00% notes [Member]              
Line of Credit Facility [Line Items]              
Senior notes       $ 350.0   $ 350.0  
Debt Instrument, Interest Rate, Stated Percentage     5.00% 5.00%      
Proceeds from issuances of long-term debt     $ 350.0        
3.88% notes [Member]              
Line of Credit Facility [Line Items]              
Senior notes       $ 300.0   $ 300.0  
Debt Instrument, Interest Rate, Stated Percentage       3.88%     3.88%
Debt Instrument, Face Amount             $ 300.0
Accelerated Share Repurchase Agreement [Member]              
Line of Credit Facility [Line Items]              
Purchases of treasury stock     $ 300.0