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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2022
Fair Value Disclosures [Abstract] |
Schedule of Financial Instruments Recorded at Fair Value | Financial Instruments Recorded at Fair Value (in millions):
| June 30, 2022 |  | December 31, 2021
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 115.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 115.6 |  |  | $ | 193.8 |  |  | $ | — |  |  | $ | — |  |  | $ | 193.8 |
Deferred compensation asset (a) | 2.4 |  |  | — |  |  | — |  |  | 2.4 |  |  | 3.2 |  |  | — |  |  | — |  |  | 3.2 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation obligation (a) | $ | 2.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 2.4 |  |  | $ | 3.2 |  |  | $ | — |  |  | $ | — |  |  | $ | 3.2 |
(a) The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is funded through a rabbi trust. Trust funds are invested in mutual funds for which unit prices are quoted in active markets and are classified within Level 1 of the valuation hierarchy.
Fair Value Option, Disclosures | The carrying value and estimated fair value of long-term debt were as follows (in millions):
| June 30, 2022 |  | December 31, 2021
| Carrying Value |  | Estimated Fair Value (a) |  | Carrying Value |  | Estimated Fair Value (a)
8.25% Notes | $ | 104.9 |  | (b) | $ | 71.2 |  |  | $ | 107.9 |  | (b) | $ | 74.3 |
(a) Based on recent trading prices and bid/ask quotes as of or near the balance sheet date, which are considered Level 2 inputs based on the frequency of trading. (b) The carrying value of the 8.25% Notes consists of the principal balance of $74.3 million and the sum of current and noncurrent interest payment obligations until maturity. Refer to Note 6, Debt.

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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- Definition Tabular disclosure of information about asset and liability measured at fair value under fair value option. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14210-108612 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14217-108612 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 + Details
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