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AQUISITIONS AND DISCONTINUED OPERATIONS - Pro Forma Results (Details) - Cues, Inc. - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Jun. 07, 2018
Business Acquisition [Line Items]
Revenues	$ 362.5	$ 369.9	$ 1,127.7	$ 1,102.2	$ 84.0
Income from continuing operations	9.4	22.5	45.4	26.8
Net income	$ 9.2	$ 22.8	$ 48.5	$ 33.5
Pro forma income (loss) from continuing operations, per share, basic	$ 0.22	$ 0.53	$ 1.06	$ 0.63
Pro forma income (loss) from continuing operations, per share, diluted	0.21	0.51	1.02	0.61
Pro forma earnings per share, basic	0.21	0.54	1.13	0.79
Pro forma earnings per share, diluted	$ 0.20	$ 0.52	$ 1.09	$ 0.77

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