v3.25.4
Business Combinations - Schedule of Fair Value of Assets Acquired and Liabilities Assumed UScellular Acquisition (Details) - USD ($)
$ in Millions
Aug. 01, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Business Combination [Line Items]        
Goodwill   $ 13,678 $ 13,005 $ 12,234
UScellular Wireless Assets Operations        
Business Combination [Line Items]        
Cash and cash equivalents $ 12      
Accounts receivable 317      
Equipment installment plan receivables 503      
Inventory 129      
Prepaid expenses 63      
Other current assets 33      
Property and equipment 1,448      
Operating lease right-of-use assets 1,199      
Goodwill 219      
Spectrum licenses 1,730      
Other intangible assets 397      
Equipment installment plan receivables due after one year 388      
Deferred tax assets 64      
Other assets 125      
Total assets acquired 6,627      
Accounts payable and accrued liabilities 296      
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 226      
Total liabilities assumed 3,772      
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