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Products and Services Revenue (Tables) | 3 Months Ended
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Mar. 31, 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 March 31,
| 2020 |  | 2019 (1)
| (Dollars in millions)
IP and Data Services | $ | 136 |  |  | 140 |
Transport and Infrastructure | 657 |  |  | 701 |
Voice and Collaboration | 395 |  |  | 418 |
IT and Managed Services | 1 |  |  | 1 |
Regulatory Revenue | 46 |  |  | 48 |
Affiliate Services | 683 |  |  | 722 |
Total operating revenue | $ | 1,918 |  |  | 2,030 |
_______________________________________________________________________________ (1) Reclassifications were made within certain 2019 comparative figures due to the retrospective application of an accounting policy election during the first quarter of 2020, in addition to product reclassification changes. Refer to Note 1—Background and our Form 8-K filing dated May 7, 2020 for further information.

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