SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Debt Conversion [Line Items]
Noncash conversion of zero-coupon convertible debt	$ 0.0	$ 8.6
Fair Value of Assets Acquired	$ 18.1	$ 13.1
Increase (Decrease) in Accrued Liabilities	(2.2)	(3.3)
Cash paid during period for:
Interest	$ 126.5	$ 74.7
Income taxes, net of refunds	176.0	211.1
Disclosure of non-cash financing and investing activities:
Restricted Stock Awards And Performance Shares Surrendered	10.8	6.6
Other Significant Noncash Transaction, Value of Consideration Given	$ 1,762.5	$ 0.0