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Fair Value Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Estimated Fair Values and Carrying Amounts of Assets and Liabilities | The following table shows the estimated fair values of the Company's financial instruments, along with the carrying amounts of the related assets (liabilities). See also note 2.
| Level in Fair Value Hierarchy |  | December 31, 2021 |  | December 31, 2020
|  | Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Assets: |  |  |  |  |  |  |  |  |
Cash and cash equivalents | 1 |  | $ | 292 |  |  | $ | 292 |  |  | $ | 232 |  |  | $ | 232 |
Restricted cash, current and non-current | 1 |  | 174 |  |  | 174 |  |  | 149 |  |  | 149 |
Liabilities: |  |  |  |  |  |  |  |  |
Total debt and other obligations | 2 |  | 20,629 |  |  | 21,588 |  |  | 19,280 |  |  | 21,302 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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