EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings per share
Income (loss) from continuing operations	$ 74.1	$ 72.3	$ 126.4	$ 112.0
Gain (loss) on disposition of discontinued operations – net of tax	0.0	1.6	(0.4)	2.0
Net income (loss)	$ 74.1	$ 73.9	$ 126.0	$ 114.0
Basic shares:
Weighted average shares outstanding - basic (in shares)	68.9	69.8	69.3	69.7
Earnings (loss) per share – basic:
Income (loss) from continuing operations	$ 1.08	$ 1.04	$ 1.82	$ 1.61
Gain (loss) on disposition of discontinued operations – net of tax		0.02		0.03
Net income (loss)	$ 1.08	$ 1.06	$ 1.82	$ 1.64
Diluted shares:
Weighted average shares outstanding - basic (in shares)	68.9	69.8	69.3	69.7
Effect of dilutive securities:
Stock options and restricted stock awards (in shares)	0.4	1.1	0.8	1.2
Diluted weighted average shares outstanding (in shares)	69.3	70.9	70.1	70.9
Earnings (loss) per share – diluted:
Income (loss) from continuing operations	$ 1.07	$ 1.02	$ 1.80	$ 1.58
Gain (loss) on disposition of discontinued operations – net of tax		0.02		0.03
Net income (loss)	$ 1.07	$ 1.04	$ 1.80	$ 1.61
Restricted Stock
Earnings (loss) per share – diluted:
Antidilutive securities excluded from computation of earnings per share (in shares)	0.9	0.1	0.6	0.1

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.