v3.26.1
Revenue Recognition - Schedule of Revenue by Segment, Sales Channel and Product Category (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Total Revenue $ 2,805 $ 3,092 $ 5,704 $ 6,274
Adjustments for Non-ASC 606 Revenue (298) (223) (591) (494)
Total Revenue from Contracts with Customers 2,507 2,869 5,113 5,780
Operating Segments | Business        
Disaggregation of Revenue [Line Items]        
Total Revenue 2,444 2,490 4,888 5,014
Adjustments for Non-ASC 606 Revenue (281) (236) (554) (471)
Total Revenue from Contracts with Customers 2,163 2,254 4,334 4,543
Operating Segments | Business | Large Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 794 766 1,572 1,535
Adjustments for Non-ASC 606 Revenue (138) (91) (267) (178)
Total Revenue from Contracts with Customers 656 675 1,305 1,357
Operating Segments | Business | Mid-Market Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 435 473 874 960
Adjustments for Non-ASC 606 Revenue (7) (6) (14) (14)
Total Revenue from Contracts with Customers 428 467 860 946
Operating Segments | Business | Public Sector        
Disaggregation of Revenue [Line Items]        
Total Revenue 490 483 996 964
Adjustments for Non-ASC 606 Revenue (28) (24) (55) (48)
Total Revenue from Contracts with Customers 462 459 941 916
Operating Segments | Business | Wholesale        
Disaggregation of Revenue [Line Items]        
Total Revenue 653 688 1,301 1,391
Adjustments for Non-ASC 606 Revenue (108) (114) (217) (229)
Total Revenue from Contracts with Customers 545 574 1,084 1,162
Operating Segments | Business | International and Other        
Disaggregation of Revenue [Line Items]        
Total Revenue 72 80 145 164
Adjustments for Non-ASC 606 Revenue 0 (1) (1) (2)
Total Revenue from Contracts with Customers 72 79 144 162
Operating Segments | Business | Strategic        
Disaggregation of Revenue [Line Items]        
Total Revenue 1,289 1,130 2,535 2,269
Adjustments for Non-ASC 606 Revenue (243) (190) (475) (383)
Total Revenue from Contracts with Customers 1,046 940 2,060 1,886
Operating Segments | Business | Strategic | Large Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 556 478 1,091 941
Adjustments for Non-ASC 606 Revenue (138) (91) (267) (178)
Total Revenue from Contracts with Customers 418 387 824 763
Operating Segments | Business | Strategic | Mid-Market Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 245 236 484 468
Adjustments for Non-ASC 606 Revenue (6) (5) (12) (11)
Total Revenue from Contracts with Customers 239 231 472 457
Operating Segments | Business | Strategic | Public Sector        
Disaggregation of Revenue [Line Items]        
Total Revenue 196 126 375 269
Adjustments for Non-ASC 606 Revenue (28) (24) (54) (48)
Total Revenue from Contracts with Customers 168 102 321 221
Operating Segments | Business | Strategic | Wholesale        
Disaggregation of Revenue [Line Items]        
Total Revenue 257 256 516 524
Adjustments for Non-ASC 606 Revenue (71) (69) (141) (144)
Total Revenue from Contracts with Customers 186 187 375 380
Operating Segments | Business | Strategic | International and Other        
Disaggregation of Revenue [Line Items]        
Total Revenue 35 34 69 67
Adjustments for Non-ASC 606 Revenue 0 (1) (1) (2)
Total Revenue from Contracts with Customers 35 33 68 65
Operating Segments | Business | Legacy        
Disaggregation of Revenue [Line Items]        
Total Revenue 1,155 1,360 2,353 2,745
Adjustments for Non-ASC 606 Revenue (38) (46) (79) (88)
Total Revenue from Contracts with Customers 1,117 1,314 2,274 2,657
Operating Segments | Business | Legacy | Large Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 238 288 481 594
Adjustments for Non-ASC 606 Revenue 0 0 0 0
Total Revenue from Contracts with Customers 238 288 481 594
Operating Segments | Business | Legacy | Mid-Market Enterprise        
Disaggregation of Revenue [Line Items]        
Total Revenue 190 237 390 492
Adjustments for Non-ASC 606 Revenue (1) (1) (2) (3)
Total Revenue from Contracts with Customers 189 236 388 489
Operating Segments | Business | Legacy | Public Sector        
Disaggregation of Revenue [Line Items]        
Total Revenue 294 357 621 695
Adjustments for Non-ASC 606 Revenue 0 0 (1) 0
Total Revenue from Contracts with Customers 294 357 620 695
Operating Segments | Business | Legacy | Wholesale        
Disaggregation of Revenue [Line Items]        
Total Revenue 396 432 785 867
Adjustments for Non-ASC 606 Revenue (37) (45) (76) (85)
Total Revenue from Contracts with Customers 359 387 709 782
Operating Segments | Business | Legacy | International and Other        
Disaggregation of Revenue [Line Items]        
Total Revenue 37 46 76 97
Adjustments for Non-ASC 606 Revenue 0 0 0 0
Total Revenue from Contracts with Customers 37 46 76 97
Operating Segments | Mass Market        
Disaggregation of Revenue [Line Items]        
Total Revenue 361 602 816 1,260
Adjustments for Non-ASC 606 Revenue (17) 13 (37) (23)
Total Revenue from Contracts with Customers 344 615 779 1,237
Operating Segments | Mass Market | Fiber Broadband        
Disaggregation of Revenue [Line Items]        
Total Revenue 17 217 109 426
Adjustments for Non-ASC 606 Revenue 0 (3) (2) (6)
Total Revenue from Contracts with Customers 17 214 107 420
Operating Segments | Mass Market | Other Broadband        
Disaggregation of Revenue [Line Items]        
Total Revenue 192 245 397 502
Adjustments for Non-ASC 606 Revenue (16) (24) (33) (48)
Total Revenue from Contracts with Customers 176 221 364 454
Operating Segments | Mass Market | Voice and Other        
Disaggregation of Revenue [Line Items]        
Total Revenue 152 140 310 332
Adjustments for Non-ASC 606 Revenue (1) 40 (2) 31
Total Revenue from Contracts with Customers $ 151 $ 180 $ 308 $ 363