Earnings (Loss) Per Share - Computations of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share Disclosure [Line Items]
Net income (loss) attributable to Cinemark Holdings, Inc.		$ (24.8)	$ 3.1
(Income) loss allocated to participating share-based awards	[1]	(0.4)	0.0
Basic net income (loss) attributable to common stockholders		24.4	(3.1)
Add: Interest expense on convertible notes, net of tax	[2]	4.8	0.0
Diluted net income (loss) attributable to common stockholders		$ 29.2	$ (3.1)
Basic weighted average shares outstanding		119.5	118.8
Common equivalent shares for restricted performance stock units	[3]	0.9	0.0
Common equivalent shares for convertible notes	[2]	32.0	0.0
Common equivalent shares for warrants		0.0	0.0
Diluted weighted average shares outstanding		152.4	118.8
Basic earnings (loss) per share attributable to common stockholders		$ 0.2	$ (0.03)
Diluted earnings (loss) per share attributable to common stockholders		$ 0.19	$ (0.03)
CNK [Member]
Earnings Per Share Disclosure [Line Items]
Net income (loss) attributable to Cinemark Holdings, Inc.		$ (24.8)	$ 3.1
Basic weighted average shares outstanding		119.5	118.8
Diluted weighted average shares outstanding		152.4	118.8
Basic earnings (loss) per share attributable to common stockholders		$ 0.2	$ (0.03)
Diluted earnings (loss) per share attributable to common stockholders		$ 0.19	$ (0.03)
Restricted Stock Units (RSUs)
Earnings Per Share Disclosure [Line Items]
Common equivalent shares for restricted performance stock units			0.0

[1] For the three months ended March 31, 2024 and 2023, a weighted average of approximately 2.0 shares and 1.8 shares of restricted stock, respectively, were considered participating securities.

[2] For the three months ended March 31, 2023 diluted loss per share excludes the conversion of the 4.50% Convertible Senior Notes into 32.0 shares of common stock as they would be anti-dilutive. See further discussion below. (4) For all periods presented, diluted earnings (loss) per share excludes the warrants, as they would be anti-dilutive.

[3] For the three months ended March 31, 2023, 0.0 common equivalent shares for performance stock units were excluded because they were anti-dilutive.