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Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Summary of Significant Accounting Policies [Abstract] |  |  |
Impairment of long-lived assets held-for-use | $ 0 | $ 0 | $ 0
Impairment of long-lived assets held for sale |  |  | 36,000,000
Number of reportable segments | 1 |  |
Disaggregation of Revenue [Line Items] |  |  |
REVENUES | $ 54,607,000,000 | 54,022,000,000 | $ 51,682,000,000
RDOF subsidy |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Government subsidies awarded | 1,200,000,000 |  |
REVENUES | 116,000,000 | $ 107,000,000 |
State grants |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Government subsidies awarded | 913,000,000 |  |
Government subsidies executed agreements | $ 597,000,000 |  |

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