SUPPLEMENTAL CASH FLOW INFORMATION Description Information - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Debt Conversion [Line Items]
Decrease in Capital Expenditures Incurred but not yet Paid	$ (17.1)
Capital Expenditures Incurred but Not yet Paid		$ (12.5)
Notes Receivable, Fair Value Disclosure	0.0	110.0
Cash paid during period for:
Interest	111.5	123.8
Income taxes, net of refunds	15.1	119.6
Disclosure of non-cash financing and investing activities:
Conversion of zero-coupon convertible debt	$ 0.0	$ 7.2