v3.20.4
GOODWILL AND INTANGIBLE ASSETS - Additional information of intangible assets acquired (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Amortizable Intangible Assets:    
Gross Carrying Amount $ 52.7 $ 52.5
Accumulated Amortization (42.0) (22.8)
Non-amortizing Intangible Assets:    
Total, unamortizable 152.5 165.6
Management contracts    
Amortizable Intangible Assets:    
Gross Carrying Amount 12.0 11.8
Accumulated Amortization $ (9.8) (7.9)
Management contracts | Minimum    
Amortizable Intangible Assets:    
Remaining Useful Life 1 year  
Management contracts | Maximum    
Amortizable Intangible Assets:    
Remaining Useful Life 6 years  
Non-compete agreements    
Amortizable Intangible Assets:    
Gross Carrying Amount $ 2.6 2.6
Accumulated Amortization (2.6) (2.1)
NCM tax receivable agreement    
Amortizable Intangible Assets:    
Gross Carrying Amount 20.9 20.9
Accumulated Amortization (20.9) (6.2)
AMCE    
Non-amortizing Intangible Assets:    
Trade names $ 104.4 104.4
Carmike | Trade name agreement    
Amortizable Intangible Assets:    
Remaining Useful Life 3 years  
Gross Carrying Amount $ 9.3 9.3
Accumulated Amortization (5.3) (4.0)
Odeon    
Non-amortizing Intangible Assets:    
Trade names 40.7 50.7
Nordic    
Non-amortizing Intangible Assets:    
Trade names $ 7.4 10.5
Starplex Cinemas | Trade name agreement    
Amortizable Intangible Assets:    
Remaining Useful Life 6 years  
Gross Carrying Amount $ 7.9 7.9
Accumulated Amortization $ (3.4) $ (2.6)