Borrowings - 3.875% Convertible Senior Subordinated Notes (Details) - USD ($) shares in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 04, 2016	Apr. 28, 2016	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Short-term Debt [Line Items]
Repayments of debt					$ 714,487,000	$ 303,627,000
Conversion of convertible notes, shares issued upon conversion			1,300	2,900	1,900	2,600
Loss on extinguishment of debt			$ 0	$ 0	$ 19,261,000	$ 10,454,000
Exchange Consideration | Convertible Debt | Convertible Notes Payable
Short-term Debt [Line Items]
Extinguishment of debt, amount	$ 219,200,000
Cash payment per $1,000 principal amount	1,000
Repayments of debt	220,700,000
Repayments of debt, accrued interest	$ 1,500,000
Conversion of convertible notes, shares issued upon conversion	2,170
Loss on extinguishment of debt		$ 16,300,000
Hedge Unwind Agreements And Warrant Unwind Agreements | Convertible Debt | Convertible Notes Payable
Short-term Debt [Line Items]
Shares received from dealer counterparties	300