CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 282.6	$ 270.1
Cost of sales	166.5	175.4
Gross profit	116.1	94.7
Operating expenses:
Selling, general and administrative	71.5	71.7
Other	0.8	1.3
Total operating expenses	72.3	73.0
Operating income	43.8	21.7
Interest expense	(11.7)	(7.1)
Interest income	3.8	0.2
Other income (expense)	(1.8)	0.6
Income from continuing operations before income taxes	34.1	15.4
Income tax expense	(8.1)	(3.2)
Income from continuing operations	26.0	12.2
Income from discontinued operations, including gain on sale, net of tax	11.4	4.9
Net income	37.4	17.1
Less: net income attributable to redeemable non-controlling interests	0.0	0.3
Net income attributable to EnPro Industries, Inc.	37.4	16.8
Comprehensive income	44.5	4.4
Less: comprehensive loss attributable to redeemable non-controlling interests	0.0	(0.7)
Comprehensive income attributable to EnPro Industries, Inc.	44.5	5.1
Income attributable to EnPro Industries, Inc. common shareholders:
Income from continuing operations, net of tax	26.0	11.9
Income from discontinued operations, including gain on sale, net of tax	11.4	4.9
Net income attributable to EnPro Industries, Inc.	$ 37.4	$ 16.8
Basic earnings per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	$ 1.25	$ 0.57
Discontinued operations (in dollars per share)	0.55	0.24
Net income per share (in dollars per share)	1.80	0.81
Diluted earnings per share attributable to EnPro Industries, Inc.:
Continuing operations (in dollars per share)	1.24	0.57
Discontinued operations (in dollars per share)	0.55	0.24
Net income per share (in dollars per share)	$ 1.79	$ 0.81