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Fair Value Disclosures (Tables)
3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Estimated Fair Values and Carrying Amounts of Assets and Liabilities
Level in Fair Value HierarchyMarch 31, 2023December 31, 2022
Carrying AmountFair ValueCarrying AmountFair Value
Assets:
Cash and cash equivalents1$187 $187 $156 $156 
Restricted cash, current and non-current1201 201 171 171 
Liabilities:
Total debt and other obligations222,332 20,403 21,729 19,554