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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2022
Fair Value Disclosures [Abstract] |
Schedule Of Carrying Values And Estimated Fair Values Of Debt Instruments | The carrying values and estimated fair values of certain of our financial instruments were as follows (in millions):
|  | December 31, 2022 |  | December 31, 2021
|  | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value
First Lien Notes(1) |  | $ | 542.4 |  |  | $ | 545.9 |  |  | $ | 545.3 |  |  | $ | 575.7 |
Long-term notes receivable from ARO (2) |  | $ | 254.0 |  |  | $ | 336.7 |  |  | $ | 249.1 |  |  | $ | 266.7 |
(1)The estimated fair value of the First Lien Notes was determined using quoted market prices, which are level 1 inputs. (2)The estimated fair value of our Notes Receivable from ARO was estimated using an income approach to value the forecasted cash flows attributed to the Notes Receivable from ARO using a discount rate based on a comparable yield with a country-specific risk premium, which are considered to be level 2 inputs.

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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 https://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 https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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