Equity - Treasury Shares (Details) - USD ($) $ in Thousands, shares in Millions	6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015
Treasury Shares
Purchase of treasury stock	$ 12,198	$ 99,486
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments (in shares)	0.2	0.1
Shares acquired to satisfy minimum individual statutory tax withholdings for vesting of equity instruments	$ 12,200	$ 8,700
Authorized Share Repurchase Program
Treasury Shares
Stock repurchased during period (in shares)		1.2
Purchase of treasury stock		$ 90,800
Remaining authorized repurchase amount	$ 69,700