CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net sales	$ 282.7	$ 303.0
Cost of sales	187.4	203.5
Gross profit	95.3	99.5
Operating expenses:
Selling, general and administrative	73.2	81.5
Other	1.6	1.4
Total operating expenses	74.8	82.9
Operating income	20.5	16.6
Interest expense	(4.7)	(5.2)
Interest income	0.7	0.7
Other income (expense)	1.4	(1.5)
Income from continuing operations before income taxes	17.9	10.6
Income tax expense	(7.7)	(2.8)
Income from continuing operations	10.2	7.8
Less: income attributable to redeemable non-controlling interest, net of tax	0.1	0.0
Income from continuing operations attributable to EnPro Industries, Inc.	10.1	7.8
Income from discontinued operations, net of tax	208.6	5.3
Net income attributable to EnPro Industries, Inc.	218.7	13.1
Comprehensive income	197.2	19.9
Less: comprehensive income attributable to redeemable non-controlling interest	1.0	0.0
Comprehensive income attributable to EnPro Industries, Inc.	$ 196.2	$ 19.9
Basic earnings per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	$ 0.49	$ 0.37
Discontinued operations (in dollars per share)	10.13	0.26
Net income per share (in dollars per share)	10.62	0.63
Diluted earnings per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	0.49	0.37
Discontinued operations (in dollars per share)	10.10	0.26
Net income per share (in dollars per share)	$ 10.59	$ 0.63