Earnings Per Share - Computations of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share Disclosure [Line Items]
Net income attributable to Cinemark Holdings, Inc.		$ 187.8	$ 90.2	$ 258.4	$ 206.2
Income allocated to participating share-based awards	[1]	(3.6)	(1.8)	(5.0)	(3.6)
Basic net income (loss) attributable to common stockholders		184.2	88.4	253.4	202.6
Add: Interest expense on convertible notes, net of tax		3.9	4.4	12.3	14.0
Net Income (Loss) Available to Common Stockholders, Diluted, Total		$ 188.1	$ 92.8	$ 265.7	$ 216.6
Basic weighted average shares outstanding		120.0	119.2	119.8	119.0
Common equivalent shares for performance stock units		2.0	0.8	1.9	0.8
Common equivalent shares for convertible notes		32.0	32.0	32.0	32.0
Common equivalent shares for warrants	[2]	4.2	0.0	0.0	0.0
Diluted weighted average shares outstanding		158.2	152.0	153.7	151.8
Basic earnings per share attributable to common stockholders		$ 1.54	$ 0.74	$ 2.11	$ 1.7
Diluted earnings per share attributable to common stockholders		$ 1.19	$ 0.61	$ 1.73	$ 1.43

[1] For the three months ended September 30, 2024 and 2023, a weighted average of approximately 2.38 shares and 2.42 shares of restricted stock, respectively, were considered participating securities. For the nine months ended September 30, 2024 and 2023, a weighted average of approximately 2.38 shares and 2.14 shares of restricted stock, respectively, were considered participating securities.

[2] For the three months ended September 30, 2023 and the nine months ended September 30, 2024 and 2023, diluted earnings per share excludes the warrants, as they would be anti-dilutive.