CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Sales	$ 274.1	$ 367.3	$ 614.1	$ 700.1
Cost of sales	178.4	226.6	396.1	435.6
Gross profit	95.7	140.7	218.0	264.5
Selling, general, and administrative expenses	84.8	106.8	188.1	201.3
Loss on fair value remeasurement of contingent consideration	12.4	0.0	12.4	0.0
Restructuring charges	8.6	0.0	16.2	0.1
Operating profit (loss)	(10.1)	33.9	1.3	63.1
Interest expense	4.6	5.5	9.5	10.7
Pension settlement charges	0.8	0.5	1.5	0.6
Other (income) expense, net	0.3	(1.0)	(0.9)	(1.6)
Income (loss) before income tax expense	(15.8)	28.9	(8.8)	53.4
Income tax expense (benefit)	(6.2)	7.2	(10.1)	13.8
Net earnings (loss)	$ (9.6)	$ 21.7	$ 1.3	$ 39.6
Net earnings (loss) per share:
Basic (in dollars per share)	$ (0.20)	$ 0.44	$ 0.03	$ 0.81
Diluted (in dollars per share)	$ (0.20)	$ 0.44	$ 0.03	$ 0.80
Weighted-average common shares outstanding: (in thousands)
Basic (in shares)	49,084,000	48,855,000	49,029,000	48,815,000
Diluted (in shares)	49,084,000	49,314,000	49,507,000	49,253,000
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on cash flow hedge, net of amounts reclassified into earnings	$ 0.4	$ (2.8)	$ (4.2)	$ (4.3)
Pension and other post-employment liability adjustments	0.8	0.4	(7.6)	0.5
Foreign currency translation adjustments	3.9	0.4	(5.4)	2.3
Foreign currency translation adjustments on long-term intercompany notes	3.6	2.0	2.0	(2.1)
Total other comprehensive income (loss), net	8.7	0.0	(15.2)	(3.6)
Total comprehensive income (loss)	$ (0.9)	$ 21.7	$ (13.9)	$ 36.0