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BUSINESS ACQUISITIONS AND DIVESTITURE - MPI Research Narrative (Details) - USD ($)		3 Months Ended	9 Months Ended
	Apr. 03, 2018	Sep. 29, 2018	Sep. 29, 2018	Sep. 30, 2017	Mar. 26, 2018
Credit facility | $2.3 Billion Credit Facility
Business Acquisition [Line Items]
Credit facility					$ 2,300,000,000.0
MPI Research
Business Acquisition [Line Items]
Purchase price	$ 829,700,000
Purchase price allocation	800,800,000
Cash acquired	27,700,000
Adjustments related to prior period	1,200,000
Goodwill, amount expected to be deductible for tax purposes	$ 4,100,000
Integration related costs and transaction costs		$ 800,000	$ 15,300,000
Pro forma revenue since acquisition date		70,200,000	136,800,000
Pro forma operating income since acquisition date		$ 12,200,000	20,400,000
Depreciation and Amortization Expense | MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			11,800,000	$ 17,300,000
Interest Expense | MPI Research
Business Acquisition [Line Items]
Adjustments related to prior period			$ 2,800,000	$ 19,300,000

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