v3.25.2
Revenue Recognition (Revenue Categories) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]        
Total operating revenues $ 30,847 $ 29,797 $ 61,473 $ 59,825
Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 25,292 25,006 50,430 49,848
Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 17,515 16,976 34,781 33,660
Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 3,929 3,528 7,775 6,967
Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 892 945 1,810 1,931
Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 2,659 3,224 5,466 6,625
Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 297 333 598 665
Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 5,555 4,791 11,043 9,977
Operating Segments        
Disaggregation of Revenue [Line Items]        
Total operating revenues 30,753 29,685 61,284 59,605
Operating Segments | Communications        
Disaggregation of Revenue [Line Items]        
Total operating revenues 29,699 28,582 59,259 57,439
Operating Segments | Communications | Mobility        
Disaggregation of Revenue [Line Items]        
Total operating revenues 21,845 20,480 43,415 41,074
Operating Segments | Communications | Mobility | Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 16,853 16,277 33,504 32,271
Operating Segments | Communications | Mobility | Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 16,853 16,277 33,504 32,271
Operating Segments | Communications | Mobility | Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Mobility | Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Mobility | Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Mobility | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Mobility | Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 4,992 4,203 9,911 8,803
Operating Segments | Communications | Business Wireline        
Disaggregation of Revenue [Line Items]        
Total operating revenues 4,313 4,755 8,781 9,668
Operating Segments | Communications | Business Wireline | Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 4,142 4,571 8,397 9,271
Operating Segments | Communications | Business Wireline | Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Business Wireline | Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 1,793 1,732 3,573 3,435
Operating Segments | Communications | Business Wireline | Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Business Wireline | Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 2,349 2,839 4,824 5,836
Operating Segments | Communications | Business Wireline | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Business Wireline | Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 171 184 384 397
Operating Segments | Communications | Consumer Wireline        
Disaggregation of Revenue [Line Items]        
Total operating revenues 3,541 3,347 7,063 6,697
Operating Segments | Communications | Consumer Wireline | Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 3,541 3,347 7,063 6,697
Operating Segments | Communications | Consumer Wireline | Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Communications | Consumer Wireline | Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 2,136 1,796 4,202 3,532
Operating Segments | Communications | Consumer Wireline | Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 892 945 1,810 1,931
Operating Segments | Communications | Consumer Wireline | Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 265 323 551 665
Operating Segments | Communications | Consumer Wireline | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 248 283 500 569
Operating Segments | Communications | Consumer Wireline | Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Latin America        
Disaggregation of Revenue [Line Items]        
Total operating revenues 1,054 1,103 2,025 2,166
Operating Segments | Latin America | Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 662 699 1,277 1,389
Operating Segments | Latin America | Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 662 699 1,277 1,389
Operating Segments | Latin America | Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Latin America | Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Latin America | Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Latin America | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Operating Segments | Latin America | Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues 392 404 748 777
Corporate        
Disaggregation of Revenue [Line Items]        
Total operating revenues 94 112 189 220
Corporate | Total Service        
Disaggregation of Revenue [Line Items]        
Total operating revenues 94 112 189 220
Corporate | Wireless        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Corporate | Fiber and advanced connectivity        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Corporate | Non-fiber consumer broadband        
Disaggregation of Revenue [Line Items]        
Total operating revenues 0 0 0 0
Corporate | Legacy and other transitional        
Disaggregation of Revenue [Line Items]        
Total operating revenues 45 62 91 124
Corporate | Other        
Disaggregation of Revenue [Line Items]        
Total operating revenues 49 50 98 96
Corporate | Equipment        
Disaggregation of Revenue [Line Items]        
Total operating revenues $ 0 $ 0 $ 0 $ 0