Earnings (Loss) Per Share - Computations of Basic and Diluted Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share Disclosure [Line Items]
Net income (loss) attributable to Cinemark Holdings, Inc.		$ 90.2	$ (24.5)	$ 206.2	$ (171.9)
(Income) loss allocated to participating share-based awards		(1.8)	0.4	(3.6)	2.4
Basic net income (loss) attributable to common stockholders		88.4	(24.1)	202.6	(169.5)
Add: Interest expense on convertible notes, net of tax	[1]	4.4	0.0	14.0	0.0
Diluted net income (loss) attributable to common stockholders		$ 92.8	$ (24.1)	$ 216.6	$ (169.5)
Basic weighted average shares outstanding		119,200	118,400	119,000	118,100
Common equivalent shares for restricted stock units	[2]	800	0	800	0
Common equivalent shares for convertible notes	[1]	32,000	0	32,000	0
Common equivalent shares for warrants	[3]	0	0	0	0
Diluted weighted average shares outstanding		152,000	118,400	151,800	118,100
Basic earnings (loss) per share attributable to common stockholders		$ 0.74	$ (0.2)	$ 1.7	$ (1.43)
Diluted earnings (loss) per share attributable to common stockholders		$ 0.61	$ (0.2)	$ 1.43	$ (1.43)
Restricted Stock Units (RSUs)
Earnings Per Share Disclosure [Line Items]
Common equivalent shares for restricted stock units			180		390

[1] For the three and nine months ended September 30, 2022 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.

[2] For the three and nine months ended September 30, 2022, 0.18 and 0.39 common equivalent shares for restricted stock units, respectively, were excluded because they were anti-dilutive.

[3] For all periods presented, diluted earnings (loss) per share excludes the warrants, as they would be anti-dilutive.