SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Debt Conversion [Line Items]
Decrease in Capital Expenditures Incurred but not yet Paid			$ (12.5)
Capital Expenditures Incurred but Not yet Paid				$ 4.8
Notes Receivable, Fair Value Disclosure	$ 110.0		110.0		$ 0.0
Cash paid during period for:
Interest			123.8	188.2
Income taxes, net of refunds			119.6	148.6
Disclosure of non-cash financing and investing activities:
Conversion of zero-coupon convertible debt			$ 7.2	$ 0.0
Other Significant Noncash Transaction, Value of Consideration Given	$ 9.2	$ 24.7