v3.26.1
Acquisition and Divestitures - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Apr. 01, 2026
Oct. 31, 2025
Sep. 30, 2025
Disposal Group, Including Discontinued Operations [Line Items]                
Goodwill $ 16,612     $ 16,612       $ 16,633
Assets 38,759     38,759       37,939
Loss from discontinued operations, net of tax 0   $ (160) 27 $ (301)      
Alloy Enterprises and Nantum AI                
Disposal Group, Including Discontinued Operations [Line Items]                
Total consideration, net of cash acquired 291              
Goodwill 193     193        
Identified intangible assets, excluding goodwill $ 127     $ 127        
Definite-lived intangible, useful life 15 years     15 years        
ADT United Kingdom Residential Security Business | Disposal Group, Held-for-sale, Not Discontinued Operations                
Disposal Group, Including Discontinued Operations [Line Items]                
Disposal group, assets $ 229     $ 229        
Disposal group, liabilities 39     39        
ADT Spain Security Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations                
Disposal Group, Including Discontinued Operations [Line Items]                
Proceeds from divestiture of business           $ 98    
Disposal group, impairment charges   $ 50            
ADT Mexico Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations                
Disposal Group, Including Discontinued Operations [Line Items]                
Proceeds from divestiture of business             $ 207  
Gain on divestiture       70        
Assets               154
Liabilities               $ 21
Residential and Light Commercial HVAC Business | Discontinued Operations, Disposed of by Sale                
Disposal Group, Including Discontinued Operations [Line Items]                
Loss from discontinued operations, net of tax     $ (160) $ 27 $ (301)      
Discontinued operation, final purchase price adjustments, payment $ 155