NEW ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	$ 583.1	$ 552.1	$ 502.4	$ 461.3	$ 436.7	$ 414.9
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity			$ (0.5)