Treasury Stock and Share-Based Awards - Summary of Restricted Stock 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
Restricted Stock [Member] | Field Incentive Compensation Plan 2024 Member
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	0.6
Cinemark Holdings Inc [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	$ 1.0
Weighted average period remaining	1 year 6 months
Cinemark Holdings Inc [Member] | Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense		$ 0.9