v3.26.3
Segment Reporting (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
segment
Sep. 30, 2025
USD ($)
Segment Reporting [Abstract]        
Number of operating segments | segment     1  
Number of reportable segments | segment     1  
Segment Reporting [Line Items]        
Total revenues $ 23,584 $ 21,957 $ 69,482 $ 63,975
Less: Significant and other segment expenses        
Bad debt expense 437 337 1,261 925
Impairment expense 0 278 0 278
Interest expense, net 1,031 924 3,117 2,762
Other expense, net 90 78 329 135
Income tax expense 1,085 814 3,004 2,757
Net income 3,455 2,714 9,198 8,889
Equipment revenues        
Segment Reporting [Line Items]        
Total revenues 3,929 3,465 11,449 10,608
Less: Significant and other segment expenses        
Cost of equipment sales 5,444 4,853 15,987 14,310
Wireless        
Segment Reporting [Line Items]        
Total revenues 23,584 21,957 69,482 63,975
Less: Significant and other segment expenses        
Employee expenses 1,978 2,210 6,083 6,021
Lease expense 1,339 1,340 4,280 3,805
Advertising expense 956 906 2,783 2,582
Bad debt expense 437 337 1,261 925
Other segment items 4,317 4,095 12,737 11,759
Impairment expense 0 278 0 278
Depreciation and amortization 3,452 3,408 10,703 9,752
Interest expense, net 1,031 924 3,117 2,762
Other expense, net 90 78 329 135
Income tax expense 1,085 814 3,004 2,757
Net income 3,455 2,714 9,198 8,889
Wireless | Equipment revenues        
Less: Significant and other segment expenses        
Cost of equipment sales $ 5,444 $ 4,853 $ 15,987 $ 14,310