v3.26.1
Segment Reporting (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
segment
Mar. 31, 2025
USD ($)
Segment Reporting [Abstract]    
Number of operating segments | segment 1  
Number of reportable segments | segment 1  
Segment Reporting Information [Line Items]    
Total revenues $ 23,107 $ 20,886
Less: Significant and other segment expenses    
Bad debt expense 426 323
Interest expense, net 1,031 916
Other expense, net 132 46
Income tax expense 830 885
Net income 2,504 2,953
Equipment revenues    
Segment Reporting Information [Line Items]    
Total revenues 3,996 3,704
Less: Significant and other segment expenses    
Cost of equipment sales 5,488 4,798
Wireless    
Segment Reporting Information [Line Items]    
Total revenues 23,107 20,886
Less: Significant and other segment expenses    
Employee expenses 2,134 1,909
Lease expense 1,582 1,207
Advertising expense 901 812
Bad debt expense 426 323
Other segment items 4,262 3,839
Depreciation and amortization 3,817 3,198
Interest expense, net 1,031 916
Other expense, net 132 46
Income tax expense 830 885
Net income 2,504 2,953
Wireless | Equipment revenues    
Less: Significant and other segment expenses    
Cost of equipment sales $ 5,488 $ 4,798