SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Debt Conversion [Line Items]
Decrease in Capital Expenditures Incurred but not yet Paid	$ 6.9
Capital Expenditures Incurred but Not yet Paid		$ (0.4)
Cash paid during period for:
Interest	276.3	174.4
Income taxes, net of refunds	235.0	263.7
Disclosure of non-cash financing and investing activities:
Conversion of zero-coupon convertible debt	0.3	13.7
Fair Value of Assets Acquired	0.0	$ 7.3
Other Significant Noncash Transaction, Value of Consideration Given	$ 67.4