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VENTURE CAPITAL INVESTMENTS - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Schedule of Equity Method Investments [Line Items]
Committed contribution	$ 109,100,000		$ 109,100,000
Venture capital investments	60,700,000		60,700,000
Dividends received	1,500,000	$ 0	8,500,000	$ 4,400,000
Gain (loss) from venture capital investments	$ 10,900,000	$ 2,500,000	$ 17,400,000	$ 6,700,000
Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	1.00%		1.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	12.00%		12.00%

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