FINANCING ARRANGEMENTS - SHORT TERM BORROWINGS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Total short-term debt	$ 2.3	$ 92.4
Add: Current portion of long-term debt	0.2	10.6
Maximum month-end short-term debt outstanding during the year	148.2	248.5
Average amount of short-term debt outstanding during the year	$ 50.1	$ 121.7
Weighted-average interest rate on short-term debt at year-end	3.70%	2.50%
Corporate commercial paper facility
Short-term Debt [Line Items]
Total short-term debt	$ 0.0	$ 67.8
Fixed interest rate	0.00%	2.80%
Other short-term loans
Short-term Debt [Line Items]
Total short-term debt	$ 2.1	$ 14.0
Fixed interest rate	3.70%	0.80%