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Treasury Stock and Share-Based Awards - Summary of Restricted Stock Award Activity (Parenthetical) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense		$ 12.6	$ 13.3
Restricted Stock [Member] | Field Incentive Compensation Plan 2025 Member
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense		0.9
Restricted Stock [Member] | Field Incentive Compensation Plan 2024 Member
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense			0.6
Performance Shares (Member)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense	[1]	12.5	10.8
Employee Benefits and Share-Based Compensation		$ 2.4	2.8
Cinemark Holdings Inc [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted average period remaining compensation expense		1 year 3 months 18 days
Cinemark Holdings Inc [Member] | Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Compensation expense		$ 1.0	$ 1.0
[1] Compensation expense for the nine months ended September 30, 2025 includes approximately $2.4 related to a change in the most likely performance metrics outcome estimated to be achieved for the 2024 grants. Compensation expense for the nine months ended September 30, 2024 includes approximately $2.8 related to a change in the most likely performance metrics outcome estimated to be achieved for the 2023 and 2024 grants.

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