Other Income Other Income (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2014	Oct. 02, 2015	Sep. 26, 2014	Aug. 31, 2014	Oct. 02, 2015	Sep. 26, 2014	Dec. 31, 2013	Dec. 31, 2012
Proceeds from sale of marketable securities		$ 43.0	$ 6.0		$ 43.0	$ 31.0
Marketable securities, realized gain		12.0	4.0		12.0	24.0
Marketable securities, after tax realized gain		$ 8.0	3.0		$ 8.0	$ 15.0
Marketable securities, after-tax gain, per diluted share		$ 0.01			$ 0.01	$ 0.02
Sales		$ 5,023.4	4,707.1		$ 14,678.3	$ 13,929.8
EVS hybrid
Proceeds from sale of product line	$ 87.0
Sales				$ 60.0			$ 100.0	$ 100.0
Gain on sale of of product line			34.0
Gain on sale of product line, net of tax			$ 26.0
After-tax gain on sale upon closing of transaction, per diluted share			$ 0.04