Promotional Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Promotional Costs [Abstract]
Promotional and other sales force compensation expenses	$ 88.2	$ 100.0	$ 288.0	$ 325.2