NEW ACCOUNTING STANDARDS NEW ACCOUNTING STANDARDS (Schedule of Net Periodic Cost of Defined Benefit Pension and Other Postretirement Employee Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold	$ 1,522.8	$ 1,398.4	$ 1,274.4
Selling, General and Administrative Expense	116.8	102.9	115.8
Miscellaneous - net	(19.6)	25.5	(33.6)
Operating Income (Loss)	673.2	390.2	130.7
Other non-operating income	17.2	10.2	7.3
Net income	$ 1,128.1	363.1	199.3
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		1,400.7	1,278.7
Selling, General and Administrative Expense		95.1	106.3
Miscellaneous - net		27.0	(32.0)
Operating Income (Loss)		397.2	137.5
Other non-operating income		3.2	0.5
Net income		363.1	199.3
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		2.3	4.3
Selling, General and Administrative Expense		(7.8)	(9.5)
Miscellaneous - net		(1.5)	(1.6)
Operating Income (Loss)		(7.0)	(6.8)
Other non-operating income		7.0	6.8
Net income		$ 0.0	$ 0.0