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Products and Services Revenue (Tables) | 9 Months Ended
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Sep. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue | Our operating revenue for our products and services consisted of the following categories:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
| (Dollars in millions)
IP and Data Services | $ | 130 |  |  | 161 |  |  | 397 |  |  | 446 |
Transport and Infrastructure | 649 |  |  | 703 |  |  | 1,957 |  |  | 2,100 |
Voice and Collaboration | 376 |  |  | 397 |  |  | 1,151 |  |  | 1,234 |
IT and Managed Services | 1 |  |  | 1 |  |  | 2 |  |  | 3 |
Regulatory Revenue | 44 |  |  | 48 |  |  | 135 |  |  | 143 |
Affiliate Services | 601 |  |  | 701 |  |  | 1,876 |  |  | 2,143 |
Total operating revenue | $ | 1,801 |  |  | 2,011 |  |  | 5,518 |  |  | 6,069 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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