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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 436.5	$ 430.4
Cost of sales	327.2	255.6
Gross margin	109.3	174.8
Selling, general and administrative expense	57.7	58.4
Other operating income (expense):
Currency transactions, net	0.9	(5.0)
Other operating expense, net	(3.5)	(3.9)
Income from operations	49.0	107.5
Other income (expense):
Interest and dividend income	2.1	1.0
Marketable equity securities	0.6	(0.2)
Other components of net periodic pension and OPEB cost	(3.8)	(3.8)
Interest expense	(4.8)	(4.8)
Income before income taxes	43.1	99.7
Income tax expense	12.8	29.0
Net income	$ 30.3	$ 70.7
Net income per basic and diluted share	$ 0.26	$ 0.61
Weighted average shares used in the calculation of net income per share	115.9	115.9

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