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Revenue Recognition - Revenue by Segment, Sales Channel and Product Category (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Total revenue | $ 5,029 | $ 5,228
Adjustments for non-ASC 606 revenue | (474) | (481)
Total revenue from contracts with customers | 4,555 | 4,747
Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 5,029 | 5,228
Operating Segments | Business |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 3,595 | 3,737
Adjustments for non-ASC 606 revenue | (274) | (273)
Total revenue from contracts with customers | 3,321 | 3,464
Operating Segments | Business | Compute and Application Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 428 | 435
Adjustments for non-ASC 606 revenue | (132) | (134)
Total revenue from contracts with customers | 296 | 301
Operating Segments | Business | IP and Data Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 1,580 | 1,622
Adjustments for non-ASC 606 revenue | (1) | (1)
Total revenue from contracts with customers | 1,579 | 1,621
Operating Segments | Business | Fiber Infrastructure Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 554 | 547
Adjustments for non-ASC 606 revenue | (78) | (70)
Total revenue from contracts with customers | 476 | 477
Operating Segments | Business | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 1,033 | 1,133
Adjustments for non-ASC 606 revenue | (63) | (68)
Total revenue from contracts with customers | 970 | 1,065
Operating Segments | Business | International and Global Accounts |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 1,013 | 1,041
Adjustments for non-ASC 606 revenue | (99) | (95)
Total revenue from contracts with customers | 914 | 946
Operating Segments | Business | International and Global Accounts | Compute and Application Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 179 | 201
Adjustments for non-ASC 606 revenue | (69) | (69)
Total revenue from contracts with customers | 110 | 132
Operating Segments | Business | International and Global Accounts | IP and Data Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 427 | 437
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 427 | 437
Operating Segments | Business | International and Global Accounts | Fiber Infrastructure Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 216 | 202
Adjustments for non-ASC 606 revenue | (30) | (26)
Total revenue from contracts with customers | 186 | 176
Operating Segments | Business | International and Global Accounts | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 191 | 201
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 191 | 201
Operating Segments | Business | Large Enterprise |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 937 | 966
Adjustments for non-ASC 606 revenue | (30) | (27)
Total revenue from contracts with customers | 907 | 939
Operating Segments | Business | Large Enterprise | Compute and Application Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 165 | 154
Adjustments for non-ASC 606 revenue | (15) | (17)
Total revenue from contracts with customers | 150 | 137
Operating Segments | Business | Large Enterprise | IP and Data Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 395 | 401
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 395 | 401
Operating Segments | Business | Large Enterprise | Fiber Infrastructure Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 124 | 138
Adjustments for non-ASC 606 revenue | (15) | (10)
Total revenue from contracts with customers | 109 | 128
Operating Segments | Business | Large Enterprise | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 253 | 273
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 253 | 273
Operating Segments | Business | Mid-Market Enterprise |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 716 | 761
Adjustments for non-ASC 606 revenue | (11) | (13)
Total revenue from contracts with customers | 705 | 748
Operating Segments | Business | Mid-Market Enterprise | Compute and Application Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 36 | 34
Adjustments for non-ASC 606 revenue | (8) | (8)
Total revenue from contracts with customers | 28 | 26
Operating Segments | Business | Mid-Market Enterprise | IP and Data Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 453 | 466
Adjustments for non-ASC 606 revenue | (1) | (1)
Total revenue from contracts with customers | 452 | 465
Operating Segments | Business | Mid-Market Enterprise | Fiber Infrastructure Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 60 | 54
Adjustments for non-ASC 606 revenue | (2) | (4)
Total revenue from contracts with customers | 58 | 50
Operating Segments | Business | Mid-Market Enterprise | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 167 | 207
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 167 | 207
Operating Segments | Business | Wholesale |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 929 | 969
Adjustments for non-ASC 606 revenue | (134) | (138)
Total revenue from contracts with customers | 795 | 831
Operating Segments | Business | Wholesale | Compute and Application Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 48 | 46
Adjustments for non-ASC 606 revenue | (40) | (40)
Total revenue from contracts with customers | 8 | 6
Operating Segments | Business | Wholesale | IP and Data Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 305 | 318
Adjustments for non-ASC 606 revenue | 0 | 0
Total revenue from contracts with customers | 305 | 318
Operating Segments | Business | Wholesale | Fiber Infrastructure Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 154 | 153
Adjustments for non-ASC 606 revenue | (31) | (30)
Total revenue from contracts with customers | 123 | 123
Operating Segments | Business | Wholesale | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 422 | 452
Adjustments for non-ASC 606 revenue | (63) | (68)
Total revenue from contracts with customers | 359 | 384
Operating Segments | Mass Markets |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 1,434 | 1,491
Adjustments for non-ASC 606 revenue | (200) | (208)
Total revenue from contracts with customers | 1,234 | 1,283
Operating Segments | Mass Markets | Voice and Other |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 541 | 607
Adjustments for non-ASC 606 revenue | (21) | (29)
Total revenue from contracts with customers | 520 | 578
Operating Segments | Mass Markets | Consumer Broadband |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 731 | 722
Adjustments for non-ASC 606 revenue | (52) | (53)
Total revenue from contracts with customers | 679 | 669
Operating Segments | Mass Markets | SBG Broadband |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 39 | 39
Adjustments for non-ASC 606 revenue | (4) | (3)
Total revenue from contracts with customers | 35 | 36
Operating Segments | Mass Markets | CAF II |  |
Disaggregation of Revenue [Line Items] |  |
Total revenue | 123 | 123
Adjustments for non-ASC 606 revenue | (123) | (123)
Total revenue from contracts with customers | $ 0 | $ 0

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