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Foreign Currency Translation - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]          
Cumulative foreign currency losses $ 398.3   $ 398.3   $ 425.1
Cumulative inflation rate 100.00%   100.00%    
Cumulative inflation period     3 years    
Blue Chip Swap [Member]          
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]          
Foreign currency exchange and other relatedloss     $ 0.7 $ 0.9  
AR          
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]          
Foreign currency exchange and other relatedloss     9.4 3.1  
CNK [Member]          
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]          
Accumulated other comprehensive income (loss) $ 393.3   393.3   416.7
Foreign currency exchange and other relatedloss (5.2) $ (3.0) (5.7) (7.9)  
CUSA [Member]          
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]          
Accumulated other comprehensive income (loss) 396.1   396.1   $ 419.5
Foreign currency exchange and other relatedloss $ (5.2) $ (3.0) $ (5.7) $ (7.9)