INVESTMENTS (RealD Inc. - Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Jan. 01, 2015	Dec. 26, 2013	Nov. 09, 2015
Schedule of Equity Method Investments [Line Items]
Carrying value of Company's investment	$ 321.8
Real D Inc
Schedule of Equity Method Investments [Line Items]
Investment in equity securities of RealD, Inc. (in shares)		900,000	900,000.0
Publicly traded common stock price (in dollars per share)	$ 10.55	$ 11.80
Decrease in investments	$ (0.4)
Carrying value of Company's investment	3.4
Minimum | Real D Inc
Schedule of Equity Method Investments [Line Items]
Publicly traded common stock price (in dollars per share)		11.27	$ 11.27
Maximum | Real D Inc
Schedule of Equity Method Investments [Line Items]
Publicly traded common stock price (in dollars per share)		$ 15.42	$ 15.42
Accumulated Net Investment Gain (Loss) Attributable to Parent | Real D Inc
Schedule of Equity Method Investments [Line Items]
Accumulated other comprehensive income	$ 0.2
Real D Inc
Schedule of Equity Method Investments [Line Items]
Issue price (in dollars per share)				$ 11.00