QUARTERLY RESULTS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended							9 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 211.7	$ 199.4	$ 425.5	$ 309.2	$ 174.6	$ 175.2	$ 345.9	$ 836.6	$ 695.7	$ 1,244.1	$ 1,145.8	$ 1,004.9
Gross profit	33.1	30.2	108.4	58.5	37.6	39.6	84.1	171.7	161.3	196.8	230.2	219.8
Net earnings (loss) from continuing operations	$ (4.6)	$ (16.4)	$ 41.9	$ 14.7	$ (4.9)	$ (7.2)	$ 40.0	$ 20.9	$ 27.9	$ (37.3)	$ 35.6	$ 42.6
Net earnings (loss) from continuing operations per share, basic (in dollars per share)	$ (0.14)	$ (0.49)	$ 1.22	$ 0.42	$ (0.15)	$ (0.22)	$ 1.17	$ 0.59	$ 0.80	$ (1.10)	$ 1.01	$ 1.22
Net earnings (loss) from continuing operations per share, diluted (in dollars per share)	$ (0.14)	$ (0.49)	$ 1.21	$ 0.42	$ (0.15)	$ (0.22)	$ 1.16	$ 0.58	$ 0.79	$ (1.10)	$ 1.00	$ 1.22
Net earnings (loss)	$ (56.0)	$ 57.1	$ (214.4)	$ 28.1	$ 4.3	$ (3.3)	$ 34.0	$ (213.3)	$ 35.0	$ (25.1)	$ (185.2)	$ 63.1
Net earnings (loss) per share, basic (in dollars per share)	$ (1.65)	$ 1.64	$ (6.32)	$ 0.82	$ 0.12	$ (0.11)	$ 0.99	$ (6.30)	$ 1.01	$ (0.74)	$ (5.48)	$ 1.83
Net earnings (loss) per share, diluted (in dollars per share)	$ (1.65)	$ 1.63	$ (6.32)	$ 0.81	$ 0.11	$ (0.11)	$ 0.99	$ (6.30)	$ 1.00	$ (0.74)	$ (5.48)	$ 1.82
Basic weighted-average shares outstanding (in shares)	34,043	34,020	33,974	33,958	33,947	33,915	33,892	34,013	33,918	34,120	33,999	33,928
Diluted weighted-average shares outstanding (in shares)	34,099	34,078	34,012	33,977	33,947	33,915	33,892	34,063	33,918	34,120	34,042	33,928
Loss contingency accrual, payments		$ 0.3	$ 2.8	$ 1.6
Release of domestic tax reserve				$ 11.0