SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash paid during period for:
Interest	$ 28.6	$ 11.4
Income taxes, net of refunds	11.1	8.4
Stock Issued During Period, Value, Conversion of Convertible Securities	5.4
Disclosure of non-cash financing and investing activities:
Conversion of zero-coupon convertible debt	$ 3.1	$ 0