SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Debt Conversion [Line Items]
Fair Value of Assets Acquired	$ 7.3	$ 12.1
Decrease in Capital Expenditures Incurred but not yet Paid	(0.4)
Capital Expenditures Incurred but Not yet Paid		1.6
Cash paid during period for:
Interest	174.4	179.5
Income taxes, net of refunds	263.7	260.9
Disclosure of non-cash financing and investing activities:
Restricted Stock Awards And Performance Shares Surrendered	46.5	33.6
Conversion of zero-coupon convertible debt	13.7	$ 6.6
Other Significant Noncash Transaction, Value of Consideration Given	$ 65.2