INVESTMENTS (DCIP - Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 26, 2014 USD ($)	Dec. 31, 2015 USD ($) renewal_option $ / digital_screen $ / digitalprojectionsystem	Jan. 01, 2015 USD ($)	Dec. 26, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Loss on extinguishment of debt		$ 5.7	$ 62.4	$ 30.7
Digital Cinema Implementation Partners | Regal Cinemas Inc
Schedule of Equity Method Investments [Line Items]
Number of times fair value renewal options (in renewal options) | renewal_option		10
Renewal options term (in years)		1 year
Digital Cinema Implementation Partners
Schedule of Equity Method Investments [Line Items]
Ownership interest in the investee (as a percent)		46.70%
Voting interest (as a percent)		33.33%
Lease term (in years)		12 years
Loss on extinguishment of debt	$ 6.0
Total rent		$ 5.4	$ 7.7	$ 14.5
Digital Cinema Implementation Partners | Regal Cinemas Inc
Schedule of Equity Method Investments [Line Items]
Loss on extinguishment of debt	$ 2.8
Digital Cinema Implementation Partners | Minimum
Schedule of Equity Method Investments [Line Items]
Incremental annual rent upon certain conditions (in dollars per digital projection system) | $ / digitalprojectionsystem		2,000
Future annual rental payments (in dollars per digital projection system) | $ / digital_screen		1,000