Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Non-cash Activities [Abstract]
Fair value of assets of acquired businesses	$ 305.1	$ 19,649.1
Cash paid for acquired businesses	(298.7)	(13,529.0)
Liabilities assumed of acquired businesses	6.4	6,120.1
Declared but unpaid dividends	61.2	61.4
Issuance of stock upon vesting of restricted stock units	$ 79.7	$ 76.8