Treasury Stock and Share-Based Awards - Summary of Restricted Stock and Restricted Stock Unit Award Activity (Parenthetical) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	$ 2.8
Restricted Stock (Member)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	13.3	$ 12.5
Performance Shares (Member)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	10.8	6.4
Cinemark Partners Second [Member] | Restricted Stock (Member)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	$ 13.4	$ 11.6	[1]

[1] Compensation expense for the nine months ended September 30, 2024 includes approximately $0.6 related to a portion of the short-term field incentive compensation plan for 2024 to be settled in restricted stock.