Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011
Non-cash Activities [Abstract]
Fair value of assets of acquired businesses and product lines	$ 205.0	$ 2,708.1
Cash paid for acquired businesses and product lines	(176.3)	(2,182.3)
Fair value of liabilities assumed of acquired businesses and product lines	28.7	525.8
Declared but unpaid dividends	48.0	0
Issuance of stock upon vesting of restricted stock units	$ 27.5	$ 21.9