XML 64 R53.htm IDEA: XBRL DOCUMENT v3.7.0.1
Borrowings and Credit Arrangements - Interest Expense under Convertible Notes (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 01, 2017
Jun. 25, 2016
Jul. 01, 2017
Jun. 25, 2016
Debt Conversion [Line Items]        
Non-cash interest expense     $ 38.9 $ 38.8
Convertible Notes Payable        
Debt Conversion [Line Items]        
Amortization of debt discount $ 4.4 $ 5.2 14.5 17.3
Amortization of deferred financing costs 0.2 0.2 0.7 0.9
Principal accretion 3.9 4.2 12.8 12.4
Non-cash interest expense 8.5 9.6 28.0 30.6
2.00% accrued interest (cash) 1.6 2.1 5.4 8.0
Interest expense, net $ 10.1 $ 11.7 $ 33.4 $ 38.6