v3.26.1
Revenue Recognition - Schedule of Revenue by Segment, Sales Channel and Product Category (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Total Revenue $ 2,899 $ 3,182
Adjustments for Non-ASC 606 Revenue (301) (271)
Total revenue from Contracts with Customers 2,598 2,911
Operating Segments | Business    
Disaggregation of Revenue [Line Items]    
Total Revenue 2,444 2,524
Adjustments for Non-ASC 606 Revenue (281) (235)
Total revenue from Contracts with Customers 2,163 2,289
Operating Segments | Business | Large Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 778 769
Adjustments for Non-ASC 606 Revenue (131) (87)
Total revenue from Contracts with Customers 647 682
Operating Segments | Business | Mid-Market Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 439 487
Adjustments for Non-ASC 606 Revenue (7) (8)
Total revenue from Contracts with Customers 432 479
Operating Segments | Business | Public Sector    
Disaggregation of Revenue [Line Items]    
Total Revenue 506 481
Adjustments for Non-ASC 606 Revenue (27) (24)
Total revenue from Contracts with Customers 479 457
Operating Segments | Business | Wholesale    
Disaggregation of Revenue [Line Items]    
Total Revenue 648 703
Adjustments for Non-ASC 606 Revenue (115) (115)
Total revenue from Contracts with Customers 533 588
Operating Segments | Business | International and Other    
Disaggregation of Revenue [Line Items]    
Total Revenue 73 84
Adjustments for Non-ASC 606 Revenue (1) (1)
Total revenue from Contracts with Customers 72 83
Operating Segments | Business | Strategic    
Disaggregation of Revenue [Line Items]    
Total Revenue 1,246 1,139
Adjustments for Non-ASC 606 Revenue (240) (193)
Total revenue from Contracts with Customers 1,006 946
Operating Segments | Business | Strategic | Large Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 535 463
Adjustments for Non-ASC 606 Revenue (131) (87)
Total revenue from Contracts with Customers 404 376
Operating Segments | Business | Strategic | Mid-Market Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 239 232
Adjustments for Non-ASC 606 Revenue (6) (6)
Total revenue from Contracts with Customers 233 226
Operating Segments | Business | Strategic | Public Sector    
Disaggregation of Revenue [Line Items]    
Total Revenue 179 143
Adjustments for Non-ASC 606 Revenue (26) (24)
Total revenue from Contracts with Customers 153 119
Operating Segments | Business | Strategic | Wholesale    
Disaggregation of Revenue [Line Items]    
Total Revenue 259 268
Adjustments for Non-ASC 606 Revenue (76) (75)
Total revenue from Contracts with Customers 183 193
Operating Segments | Business | Strategic | International and Other    
Disaggregation of Revenue [Line Items]    
Total Revenue 34 33
Adjustments for Non-ASC 606 Revenue (1) (1)
Total revenue from Contracts with Customers 33 32
Operating Segments | Business | Legacy    
Disaggregation of Revenue [Line Items]    
Total Revenue 1,198 1,385
Adjustments for Non-ASC 606 Revenue (41) (42)
Total revenue from Contracts with Customers 1,157 1,343
Operating Segments | Business | Legacy | Large Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 243 306
Adjustments for Non-ASC 606 Revenue 0 0
Total revenue from Contracts with Customers 243 306
Operating Segments | Business | Legacy | Mid-Market Enterprise    
Disaggregation of Revenue [Line Items]    
Total Revenue 200 255
Adjustments for Non-ASC 606 Revenue (1) (2)
Total revenue from Contracts with Customers 199 253
Operating Segments | Business | Legacy | Public Sector    
Disaggregation of Revenue [Line Items]    
Total Revenue 327 338
Adjustments for Non-ASC 606 Revenue (1) 0
Total revenue from Contracts with Customers 326 338
Operating Segments | Business | Legacy | Wholesale    
Disaggregation of Revenue [Line Items]    
Total Revenue 389 435
Adjustments for Non-ASC 606 Revenue (39) (40)
Total revenue from Contracts with Customers 350 395
Operating Segments | Business | Legacy | International and Other    
Disaggregation of Revenue [Line Items]    
Total Revenue 39 51
Adjustments for Non-ASC 606 Revenue 0 0
Total revenue from Contracts with Customers 39 51
Operating Segments | Mass Market    
Disaggregation of Revenue [Line Items]    
Total Revenue 455 658
Adjustments for Non-ASC 606 Revenue (20) (36)
Total revenue from Contracts with Customers 435 622
Operating Segments | Mass Market | Fiber Broadband    
Disaggregation of Revenue [Line Items]    
Total Revenue 92 209
Adjustments for Non-ASC 606 Revenue (17) (3)
Total revenue from Contracts with Customers 75 206
Operating Segments | Mass Market | Other Broadband    
Disaggregation of Revenue [Line Items]    
Total Revenue 205 257
Adjustments for Non-ASC 606 Revenue (2) (24)
Total revenue from Contracts with Customers 203 233
Operating Segments | Mass Market | Voice and Other    
Disaggregation of Revenue [Line Items]    
Total Revenue 158 192
Adjustments for Non-ASC 606 Revenue (1) (9)
Total revenue from Contracts with Customers $ 157 $ 183