v3.25.3
Business Combinations - Schedule of Fair Value of Assets Acquired and Liabilities Assumed UScellular Acquisition (Details) - USD ($)
$ in Millions
Aug. 01, 2025
Sep. 30, 2025
Dec. 31, 2024
Business Combination [Line Items]      
Goodwill   $ 13,690 $ 13,005
UScellular Wireless Assets Operations      
Business Combination [Line Items]      
Cash and cash equivalents $ 12    
Accounts receivable 317    
Equipment installment plan receivables 503    
Inventory 130    
Prepaid expenses 63    
Other current assets 33    
Property and equipment 1,430    
Operating lease right-of-use assets 1,199    
Goodwill 231    
Spectrum licenses 1,730    
Other intangible assets 397    
Equipment installment plan receivables due after one year 388    
Deferred tax assets 55    
Other assets 126    
Total assets acquired 6,614    
Accounts payable and accrued liabilities 301    
Deferred revenue 275    
Short-term operating lease liabilities 179    
Other current liabilities 114    
Long-term debt 1,653    
Operating lease liabilities 1,029    
Other long-term liabilities 208    
Total liabilities assumed 3,759    
Total consideration transferred 2,855    
UScellular Wireless Assets Operations | Master License Agreement      
Business Combination [Line Items]      
Operating lease right-of-use assets 749    
Short-term operating lease liabilities 51    
Operating lease liabilities $ 698