v3.26.3
NONCONTROLLING INTERESTS - Narrative (Details)
€ in Millions, $ in Millions
3 Months Ended 9 Months Ended
Aug. 08, 2026
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2026
EUR (€)
Sep. 30, 2025
USD ($)
Dec. 31, 2021
Noncontrolling Interest [Line Items]            
Reallocation of noncontrolling interest due to equity conversion   $ 0.0 $ 0.0      
Noncontrolling Interests            
Noncontrolling Interest [Line Items]            
Reallocation of noncontrolling interest due to equity conversion $ (244.9) (244.9) (244.9)   $ 0.0  
Additional Paid-in Capital            
Noncontrolling Interest [Line Items]            
Reallocation of noncontrolling interest due to equity conversion $ 244.9 $ 244.9 244.9      
Stonepeak            
Noncontrolling Interest [Line Items]            
Dividends declared for common stock     $ 54.5      
U.S. | Data Centers | Common Stock            
Noncontrolling Interest [Line Items]            
Percentage of ownership after transaction (as a percent)     64.00% 64.00%    
Kirtonkhola Tower Bangladesh Limited            
Noncontrolling Interest [Line Items]            
Percentage of interests acquired (as a percent)           51.00%
Stonepeak | Preferred Stock            
Noncontrolling Interest [Line Items]            
Dividends declared     $ 27.6      
AT Europe C.V.            
Noncontrolling Interest [Line Items]            
Dividends declared     47.1 € 41.4    
AT Iberia C.V.            
Noncontrolling Interest [Line Items]            
Dividends declared     $ 77.0 € 67.6    
ATC Europe            
Noncontrolling Interest [Line Items]            
Controlling ownership interest percentage (as a percent)   52.00% 52.00% 52.00%    
ATC Europe | CDPQ            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)   30.00% 30.00% 30.00%    
ATC Europe | Allianz            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)   18.00% 18.00% 18.00%    
France | ATC Europe            
Noncontrolling Interest [Line Items]            
Controlling ownership interest percentage (as a percent)   100.00% 100.00% 100.00%    
Germany            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)   13.00% 13.00% 13.00%    
Germany | ATC Europe            
Noncontrolling Interest [Line Items]            
Controlling ownership interest percentage (as a percent)   87.00% 87.00% 87.00%    
Spain            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)   17.00% 17.00% 17.00%    
Spain | ATC Europe            
Noncontrolling Interest [Line Items]            
Controlling ownership interest percentage (as a percent)   83.00% 83.00% 83.00%    
Kirtonkhola Tower Bangladesh Limited | Confidence Group            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)           49.00%
Stonepeak | U.S. | Data Centers            
Noncontrolling Interest [Line Items]            
Preferred stock, dividend rate (as a percent) 5.00%          
Preferred stock, conversion ratio 1          
Stonepeak | U.S. | Data Centers | Common Stock            
Noncontrolling Interest [Line Items]            
Noncontrolling owner ownership percentage (as a percent)   36.00% 36.00% 36.00%