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Revenue Recognition (Tables) | 12 Months Ended
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Dec. 31, 2022
Revenue from Contract with Customer [Abstract] |
Schedule of disaggregated revenue by service offering | The following tables provide our total revenue by product and service category as well as the amount of revenue that is not subject to ASC 606, "Revenue from Contracts with Customers" ("ASC 606"), but is instead governed by other accounting standards:
| Year Ended December 31, 2022
| Total Revenue |  | Adjustments for Non-ASC 606 Revenue(1) |  | Total Revenue from Contracts with Customers
| (Dollars in millions)
Voice and Other | $ | 1,749 |  |  | (197) |  |  | 1,552 |
Fiber Infrastructure | 1,955 |  |  | (131) |  |  | 1,824 |
IP and Data Services | 451 |  |  | — |  |  | 451 |
Affiliate Services | 2,294 |  |  | (45) |  |  | 2,249 |
Total revenue | $ | 6,449 |  |  | (373) |  |  | 6,076 |
Timing of revenue |  |  |  |  |
Goods and services transferred at a point in time |  |  |  |  | $ | 28 |
Services performed over time |  |  |  |  | 6,048 |
Total revenue from contracts with customers |  |  |  |  | $ | 6,076 |
| Year Ended December 31, 2021
| Total Revenue |  | Adjustments for Non-ASC 606 Revenue(1) |  | Total Revenue from Contracts with Customers
| (Dollars in millions)
Voice and Other | $ | 2,099 |  |  | (334) |  |  | 1,765 |
Fiber Infrastructure | 1,990 |  |  | (120) |  |  | 1,870 |
IP and Data Services | 473 |  |  | — |  |  | 473 |
Affiliate Services | 2,389 |  |  | (29) |  |  | 2,360 |
Total revenue | $ | 6,951 |  |  | (483) |  |  | 6,468 |
Timing of revenue |  |  |  |  |
Goods and services transferred at a point in time |  |  |  |  | $ | 30 |
Services performed over time |  |  |  |  | 6,438 |
Total revenue from contracts with customers |  |  |  |  | $ | 6,468 |
| Year Ended December 31, 2020
| Total Revenue |  | Adjustments for Non-ASC 606 Revenue(1) |  | Total Revenue from Contracts with Customers
| (Dollars in millions)
Voice and Other | $ | 2,281 |  |  | (352) |  |  | 1,929 |
Fiber Infrastructure | 2,033 |  |  | (123) |  |  | 1,910 |
IP and Data Services | 512 |  |  | — |  |  | 512 |
Affiliate Services | 2,487 |  |  | (4) |  |  | 2,483 |
Total revenue | $ | 7,313 |  |  | (479) |  |  | 6,834 |
Timing of revenue |  |  |  |  |
Goods and services transferred at a point in time |  |  |  |  | $ | 46 |
Services performed over time |  |  |  |  | 6,788 |
Total revenue from contracts with customers |  |  |  |  | $ | 6,834 |
_______________________________________________________________________________ (1)Includes regulatory revenue and lease revenue not within the scope of ASC 606.
Schedule of customer receivables and contract balances | The following table provides balances of customer receivables, contract assets and contract liabilities as of December 31, 2022 and 2021:
| December 31, 2022 |  | December 31, 2021
| (Dollars in millions)
Customer receivables (1) | $ | 297 |  |  | 298 |
Contract assets | 9 |  |  | 10 |
Contract liabilities | 343 |  |  | 317 |
_______________________________________________________________________________ (1)Reflects gross customer receivables, including gross affiliate receivables, of $324 million and $328 million, net of allowance for credit losses of $27 million and $30 million, at December 31, 2022 and December 31, 2021, respectively.
Schedule of contract costs | The following tables provide changes in our contract acquisition costs and fulfillment costs:
| Year Ended December 31, 2022
| Acquisition Costs |  | Fulfillment Costs
| (Dollars in millions)
Beginning of period balance | $ | 64 |  |  | 47 |
Costs incurred | 50 |  |  | 39 |
Amortization | (53) |  |  | (40) |
End of period balance | $ | 61 |  |  | 46 |
| Year Ended December 31, 2021
| Acquisition Costs |  | Fulfillment Costs
| (Dollars in millions)
Beginning of period balance | $ | 73 |  |  | 54 |
Costs incurred | 49 |  |  | 27 |
Amortization | (58) |  |  | (34) |
End of period balance | $ | 64 |  |  | 47 |

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- Definition Tabular disclosure of cost capitalized in obtaining or fulfilling contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126905575&loc=SL49131252-203054 + Details
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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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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 https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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