GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 85.8	$ 72.7	$ 62.6
Finite-Lived Intangible Assets, Future Amortization Expense
Estimated amortization expense, 2012	83.9
Estimated amortization expense, 2013	78.3
Estimated amortization expense, 2014	75.5
Estimated amortization expense, 2015	72.0
Estimated amortization expense, 2016	66.8
Estimated amortization expense, Thereafter	478.2
Amount paid for diagnostic testing technology licensing rights	0	0.4	0
Canadian licenses, value	$ 722.2