SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Conversion [Line Items]
Decrease in Capital Expenditures Incurred but not yet Paid					$ (15.9)
Capital Expenditures Incurred but Not yet Paid						$ 6.9
Notes Receivable, Fair Value Disclosure	$ 110.0				110.0		$ 0.0
Cash paid during period for:
Interest					216.5	276.3
Income taxes, net of refunds					181.6	235.0
Disclosure of non-cash financing and investing activities:
Conversion of zero-coupon convertible debt				$ 0.3	$ 1.7	$ 0.3
Other Significant Noncash Transaction, Value of Consideration Given	$ 25.1	$ 9.2	$ 24.7	$ 24.4