CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Treasury stock	5,960,000	5,680,000
CNK [Member]
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	127,577,909	126,082,187
Common stock, shares outstanding	121,616,481	120,403,833
Treasury stock	5,961,428	5,678,354
Accumulated depreciation and amortization	$ 2,283.8	$ 2,165.7
CUSA [Member]
Treasury stock	57,245	57,245
Accumulated depreciation and amortization	$ 2,283.8	$ 2,165.7
Common Class A [Member] | CUSA [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	1,500	1,500
Common stock, shares outstanding	1,500	1,500
Common Class B [Member] | CUSA [Member]
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	1,000,000	1,000,000
Common stock, shares issued	239,893	239,893
Common stock, shares outstanding	182,648	182,648