v3.26.3
Segments - Holdings - Reconciliation of Net Income (Loss) to Adjusted EBITDA (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Add (deduct):                
Interest expense [1] $ 31.3     $ 32.2     $ 97.3 $ 110.1
Other (loss) income, net 0.8     0.1     (4.9) (8.9)
Depreciation and amortization 53.5     50.9     156.7 149.8
Impairment of long-lived and other assets 0.0     0.6     0.0 2.2
(Gain) loss on disposal of assets and other (2.3)     3.0     4.2 (0.1)
Loss on debt amendments and extinguishments 0.0     0.0     2.8 1.5
Loss on warrants 0.0     54.5     0.0 54.5
Non-cash rent expense (2.7)     (2.9)     (8.3) (8.5)
Share-based awards compensation expense [2] 10.5     10.3     28.1 26.1
Adjusted EBITDA 267.6     177.6     650.1 446.2
CNK                
Segment Reporting Information [Line Items]                
Net income 124.2 $ 140.8 $ (5.8) 50.5 $ 94.7 $ (38.6) 259.2 106.6
Add (deduct):                
Income tax expense (benefit) 50.3     (22.9)     108.7 4.9
Interest expense 31.3     32.2     97.3 110.1
Other (loss) income, net (0.8)     (0.1)     4.9 8.9
Cash distributions from equity investees             6.3 8.0
Depreciation and amortization 53.5     50.9     156.7 149.8
Impairment of long-lived and other assets 0.0     0.6     0.0 2.2
Loss on debt amendments and extinguishments 0.0     0.0     (2.8) (1.5)
Non-cash rent expense             (8.3) (8.5)
Share-based awards compensation expense             (28.1) (26.1)
Other Cash Distributions From Equity Investees [Member]                
Add (deduct):                
Cash distributions from equity investees [3] $ 2.0     $ 1.3     $ 6.3 $ 8.0
[1] Includes amortization of debt issuance costs, amortization of original issue discount, and amortization of accumulated losses for amended swap agreements.
[2] Non-cash expense included in general and administrative expenses.
[3] Reflects cash distributions received from equity investees that were recorded as a reduction of the respective investment balances. These distributions are reported entirely within the U.S. reportable segment.