Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Non-cash Activities [Abstract]
Fair value of assets of acquired businesses and product lines	$ 0	$ 2.1
Cash paid for acquired businesses and product lines	0	(1.1)
Fair value of liabilities assumed of acquired businesses and product lines	0	1.0
Declared but unpaid dividends	48.0	0
Issuance of stock upon vesting of restricted stock units	$ 26.1	$ 21.6