ACCOUNTS AND OTHER RECEIVABLES - New ASU (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net	$ 556.9		$ 564.4
Other current assets			973.7
Net property, plant and equipment	797.4		830.8
Other assets			2,447.5
TOTAL ASSETS	4,582.1		4,816.4
Current liabilities	775.5		928.1
Long-term liabilities	2,592.0		2,575.8
Retained earnings	2,663.1		2,734.5
Other equity			(1,422.0)
TOTAL LIABILITIES AND EQUITY	$ 4,582.1		$ 4,816.4
Cumulative effect adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net		$ (3.3)
Other current assets		0.0
Net property, plant and equipment		0.0
Other assets		0.0
TOTAL ASSETS		(3.3)
Current liabilities		0.0
Long-term liabilities		(0.8)
Retained earnings		(2.5)
Other equity		0.0
TOTAL LIABILITIES AND EQUITY		(3.3)
Adjusted balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net		561.1
Other current assets		973.7
Net property, plant and equipment		830.8
Other assets		2,447.5
TOTAL ASSETS		4,813.1
Current liabilities		928.1
Long-term liabilities		2,575.0
Retained earnings		2,732.0
Other equity		(1,422.0)
TOTAL LIABILITIES AND EQUITY		$ 4,813.1