INVESTMENTS (National CineMedia - Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Jan. 01, 2015	Dec. 26, 2013	Dec. 27, 2012
Equity Investment
Ending Balance	$ 321.8
Earnings recognized from NCM
Income (Loss) from Equity Method Investments	31.0	$ 32.1	$ 37.5
Other NCM Revenues [Abstract]
Gain on sale of NCM, Inc. common stock	0.0	0.0	30.9
National Cine Media
Equity Investment
Beginning Balance	157.4	158.5	73.9
Receipt of additional common units	9.0	5.9	33.8
Receipt of common units due to extraordinary common unit adjustment			61.4
Receipt of excess cash distributions	(11.8)	(10.2)	(9.1)
Receipt under tax receivable agreement	(3.5)	(3.9)	(0.9)
Equity in earnings attributable to additional common units	6.3	7.1	7.5
Redemption/sale of NCM stock			(10.0)
Deferred gain on AC JV, LLC transaction			(1.9)
Ending Balance	157.4	157.4	158.5	$ 73.9
Deferred Revenue
Beginning Balance	(428.5)	(432.2)	(344.3)
Receipt of additional common units	(9.0)	(5.9)	(33.8)
Receipt of common units due to extraordinary common unit adjustment			(61.4)
Amortization of deferred revenue	10.8	9.6	7.3
Ending Balance	(426.7)	(428.5)	(432.2)	(344.3)
Earnings recognized from NCM
Equity in earnings attributable to additional common units	6.3	7.1	7.5
Other NCM Revenues [Abstract]
Amortization of deferred revenue	10.8	9.6	7.3
Gain on sale of NCM, Inc. common stock	0.0	0.0	(30.9)	0.0
National Cine Media | Cash Received
Cash Received
Beginning Balance	53.3	93.5	49.5
Receipt of excess cash distributions	(30.5)	(27.1)	(35.4)
Receipt under tax receivable agreement	(9.5)	(12.0)	(4.6)
Revenues earned under ESA	(16.7)	(14.2)	(12.6)
Redemption/sale of NCM stock			40.9
Ending Balance	56.7	53.3	93.5	49.5
Earnings recognized from NCM
Receipt of excess cash distributions	(30.5)	(27.1)	(35.4)
Receipt under tax receivable agreement	(9.5)	(12.0)	(4.6)
Other NCM Revenues [Abstract]
Revenues earned under ESA	(16.7)	(14.2)	(12.6)
National Cine Media | Earnings recognized from NCM
Equity Investment
Equity in earnings attributable to additional common units	6.3	7.1	7.5
Cash Received
Receipt of excess cash distributions	(18.7)	(16.9)	(26.3)
Receipt under tax receivable agreement	(6.0)	(8.1)	(3.7)
Earnings recognized from NCM
Receipt of excess cash distributions	(18.7)	(16.9)	(26.3)
Receipt under tax receivable agreement	(6.0)	(8.1)	(3.7)
Equity in earnings attributable to additional common units	6.3	7.1	7.5
Income (Loss) from Equity Method Investments	(31.0)	(32.1)	(37.5)	(34.8)
National Cine Media | Other NCM Revenues
Deferred Revenue
Amortization of deferred revenue	(10.8)	(9.6)	(7.3)
Cash Received
Revenues earned under ESA	(16.7)	(14.2)	(12.6)
Other NCM Revenues [Abstract]
Revenues earned under ESA	(16.7)	(14.2)	(12.6)
Amortization of deferred revenue	(10.8)	(9.6)	(7.3)
Other Revenue from Equity Method Investment, Total	$ (27.5)	$ (23.8)	$ (19.9)	$ (17.0)