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Fair Value Disclosures (Tables)
6 Months Ended
Jun. 30, 2022
Fair Value Disclosures [Abstract]  
Estimated Fair Values and Carrying Amounts of Assets and Liabilities
Level in Fair Value HierarchyJune 30, 2022December 31, 2021
Carrying
 Amount
Fair
Value
Carrying
 Amount
Fair
Value
Assets:
Cash and cash equivalents1$281 $281 $292 $292 
Restricted cash, current and non-current1165 165 174 174 
Liabilities:
Total debt and other obligations221,282 19,442 20,629 21,588