INCOME TAXES - Tax Effects of Significant Temporary Differences and Tax Loss and Tax Credit Carryforwards (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Theatre properties and equipment	$ 68.4	$ 76.9
Finance lease assets	13.3	16.0
Operating lease right-of-use assets	248.8	274.3
Intangible asset — other	55.8	49.6
Intangible asset — tradenames	69.5	68.9
Total deferred liabilities	455.8	485.7
Prepaid rent	2.7	4.1
Gift Cards	9.7	8.8
Investment in partnerships	1.4	5.2
Operating lease obligations	269.0	296.1
Finance lease obligations	18.6	21.6
Tax impact of items in accumulated other comprehensive income and additional paid-in-capital	13.4	16.4
Restricted stock	4.5	5.1
Accrued expenses	2.9	3.7
Other tax loss carryforwards	82.7	126.1
Other tax credit and attribute carryforwards	179.3	193.5
Other expenses, not currently deductible for tax purposes	11.7	14.9
Total deferred assets	678.1	778.1
Net deferred income tax (asset) liability before valuation allowance	(222.3)	(292.4)
Valuation allowance against deferred assets – non-current	266.3	326.1
Net deferred income tax liability	44.0	33.7
CUSA
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Theatre properties and equipment	68.2	76.7
Finance lease assets	13.2	15.9
Operating lease right-of-use assets	248.1	273.9
Intangible asset — other	55.7	49.5
Intangible asset — tradenames	69.3	68.8
Tax impact of items in accumulated other comprehensive income and additional paid-in-capital	1.4	5.3
Total deferred liabilities	455.9	490.1
Deferred revenue - NCM and other	82.0	82.4
Prepaid rent	2.7	4.1
Gift Cards	9.7	8.8
Investment in partnerships	1.4	5.2
Operating lease obligations	268.3	295.6
Finance lease obligations	18.6	21.6
Restricted stock	4.3	4.9
Accrued expenses	2.9	3.7
Other tax loss carryforwards	80.0	122.0
Other tax credit and attribute carryforwards	149.0	174.1
Other expenses, not currently deductible for tax purposes	11.5	14.8
Total deferred assets	630.4	737.2
Net deferred income tax (asset) liability before valuation allowance	(174.5)	(247.1)
Valuation allowance against deferred assets – non-current	218.5	283.2
Net deferred income tax liability	44.0	36.1
NCM
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Deferred revenue - NCM and other	82.2	82.6
Foreign
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Net deferred Income tax (asset) liability	0.1	4.7
Foreign | CUSA
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Net deferred Income tax (asset) liability	0.1	4.7
U.S.
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Net deferred income tax liability	44.1	29.0
U.S. | CUSA
Schedule Of Deferred Income Tax Assets And Liabilities [Line Items]
Net deferred income tax liability	$ 44.1	$ 31.4