SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash paid during period for:
Interest	$ 248.9	$ 296.2	$ 239.1
Income taxes, net of refunds	216.8	349.7	348.0
Disclosure of non-cash financing and investing activities
Noncash conversion of zero-coupon convertible debt	8.4	0.3	35.0
Fair Value of Assets Acquired	48.7	0.6	7.3
Capital Expenditures Incurred but Not yet Paid	2.7	22.1	1.6
Notes Receivable, Fair Value Disclosure	$ 110.0	$ 0.0	$ 0.0