SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Debt Conversion [Line Items]
Noncash conversion of zero-coupon convertible debt	$ 0.0	$ 8.1
Fair Value of Assets Acquired	$ 18.0	$ 8.8
Increase (Decrease) in Accrued Liabilities	0.3	(2.7)
Cash paid during period for:
Interest	$ 54.5	$ 55.8
Income taxes, net of refunds	90.6	111.1
Disclosure of non-cash financing and investing activities:
Restricted Stock Awards And Performance Shares Surrendered	10.4	6.6
Other Significant Noncash Transaction, Value of Consideration Given	$ 1,762.5	$ 0.0