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		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Disclosure [Line Items]
Net income (loss) attributable to Cinemark Holdings, Inc.		$ 119.1	$ (73.4)	$ 116.0	$ (147.4)
(Income) loss allocated to participating share-based awards	[1]	(2.3)	1.4	(1.9)	2.5
Basic net income (loss) attributable to common stockholders		116.8	(72.0)	114.1	(144.9)
Add: Interest expense on convertible notes, net of tax	[2]	4.6	0.0	9.8	0.0
Diluted net income (loss) attributable to common stockholders		$ 121.4	$ (72.0)	$ 123.9	$ (144.9)
Basic weighted average shares outstanding		119,100	118,200	118,900	118,000
Common equivalent shares for restricted stock units	[3]	600	0	600	0
Common equivalent shares for convertible notes	[2]	32,000	0	32,000	0
Common equivalent shares for warrants	[4]	0	0	0	0
Diluted weighted average shares outstanding		151,700	118,200	151,500	118,000
Basic earnings (loss) per share attributable to common stockholders		$ 0.98	$ (0.61)	$ 0.96	$ (1.23)
Diluted earnings (loss) per share attributable to common stockholders		$ 0.80	$ (0.61)	$ 0.82	$ (1.23)
Restricted Stock Units (RSUs)
Earnings Per Share Disclosure [Line Items]
Common equivalent shares for restricted stock units			250		280

[1] For the three months ended June 30, 2023 and 2022, a weighted average of approximately 2.40 shares and 2.27 shares of restricted stock, respectively, were considered participating securities. For the six months ended June 30, 2023 and 2022, a weighted average of approximately 2.03 shares and 2.03 shares of restricted stock, respectively, were considered participating securities

[2] For the three and six months ended June 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.

[3] For the three months ended June 30, 2022, 0.25 common equivalent shares for restricted stock units, respectively, were excluded because they were anti-dilutive. For the six months ended June 30, 2022, approximately 0.28 common equivalent shares for restricted stock units, respectively, were excluded because they were anti-dilutive.

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