v3.26.3
Equity (Details)
$ / shares in Units, $ in Millions, ₡ in Billions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
shares
Sep. 30, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
Sep. 30, 2025
shares
Sep. 30, 2026
USD ($)
shares
Jan. 29, 2027
USD ($)
Jan. 29, 2027
CRC (₡)
May 31, 2026
$ / shares
Jan. 30, 2026
Dec. 31, 2025
shares
May 31, 2025
$ / shares
shares
May 07, 2024
USD ($)
Class of Stock [Line Items]                        
Stock repurchased program, remaining authorized repurchase amount $ 81.0 $ 81.0     $ 81.0              
Dividends payable in cash   $ 11.0                    
Common stock dividends per share (in dollars per share) | $ / shares   $ 0.5625                    
Pension-related actuarial losses 75.0                      
Pension-related adjustments and other, net $ 50.0 $ 50.0     $ 50.0              
Liberty Costa Rica                        
Class of Stock [Line Items]                        
Ownership interest (as a percent)                 8.50%      
Liberty Costa Rica | Payment One                        
Class of Stock [Line Items]                        
Payments to acquire equity method investments     $ 53.0                  
Liberty Costa Rica | Forecast                        
Class of Stock [Line Items]                        
Payments to acquire equity method investments           $ 84.0            
Liberty Costa Rica | Forecast | Payment One                        
Class of Stock [Line Items]                        
Payments to acquire equity method investments           18.0 ₡ 8          
Liberty Costa Rica | Forecast | Payment Two                        
Class of Stock [Line Items]                        
Payments to acquire equity method investments           $ 15.0            
Common Class A And Common Class C                        
Class of Stock [Line Items]                        
Stock repurchased program authorized amount                       $ 200.0
Treasury stock, acquired (in shares) | shares       300,000                
Common Class A                        
Class of Stock [Line Items]                        
Treasury stock, acquired (in shares) | shares   900,000     2,200,000              
Common Class C                        
Class of Stock [Line Items]                        
Treasury stock, acquired (in shares) | shares   10,300,000     12,700,000              
Series A Preference Shares                        
Class of Stock [Line Items]                        
Preferred stock, shares issued (in shares) | shares 20,100,000 20,100,000     20,100,000         0 0.1  
Liquidation price (in dollars per share) | $ / shares               $ 25     $ 25  
Dividend rate         9.00%              
Aggregate liquidation (in percent)         25.00%