Revenue Recognition - Changes in Advances and Deferred Revenues (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Change in Contract with Customer Liability [Line Items]
Amounts recognized as accounts receivable	$ 5.6
N C M Screen Advertising Advances
Change in Contract with Customer Liability [Line Items]
Balance at January 1, 2023	338.2	[1]
Amounts recognized as accounts receivable	0.0	[1]
Cash received from customers in advance	0.0	[1]
Dispositions	0.0	[1],[2]
Interest accrued related to significant financing component	(17.0)	[1]
Revenue recognized during period	(24.3)	[1]
Foreign currency translation adjustments	0.0	[1]
Balance at March 31, 2023	330.9	[1]
Other Deferred Revenues
Change in Contract with Customer Liability [Line Items]
Balance at January 1, 2023	194.9	[3]
Amounts recognized as accounts receivable	3.6	[3]
Cash received from customers in advance	224.9	[3]
Dispositions	(0.4)	[2],[3]
Interest accrued related to significant financing component	0.0	[3]
Revenue recognized during period	(220.6)	[3]
Foreign currency translation adjustments	(2.9)	[3]
Balance at March 31, 2023	$ 199.5	[3]

[1] See Note 8 for the maturity of NCM screen advertising advances as of September 30, 2023.

[2] Relates to the sale of the Company’s Ecuador subsidiary. See Note 6.

[3] Includes liabilities associated with outstanding gift cards and discount ticket vouchers, points or rebates outstanding under the Company’s loyalty and membership programs and revenue collected but not yet earned for screen advertising and other promotional activities. Amounts are classified as accounts payable and accrued expenses or other long-term liabilities on the condensed consolidated balance sheet.