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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2022
Fair Value Disclosures [Abstract] |
Schedule of Company's Financial Assets and (Liabilities) at Fair Value on Recurring Basis | The following table summarizes the basis used to measure the Company’s financial assets (liabilities) at fair value on a recurring basis in the balance sheets at September 30, 2022 and December 31, 2021:
| Basis of Fair Value Measurements
| Balance at September 30, 2022 |  | Level 1 |  | Level 2 |  | Level 3
Trading securities - mutual funds held in nonqualified SERP(1) | $ | 7.1 |  |  | $ | 7.1 |  |  | $ | — |  |  | $ | — |
Available-for-sale securities - equities(2) | 38.8 |  |  | 38.8 |  |  | — |  |  | — |
| Basis of Fair Value Measurements
| Balance at December 31, 2021 |  | Level 1 |  | Level 2 |  | Level 3
Trading securities - mutual funds held in nonqualified SERP(1) | $ | 11.6 |  |  | $ | 11.6 |  |  | $ | — |  |  | $ | — |
Available-for-sale securities - equities(2) | 45.3 |  |  | 45.3 |  |  | — |  |  | — |
(1) The Supplemental Executive Retirement Plan (“SERP”) investment assets are offset by a SERP liability which represents the Company’s obligation to distribute SERP funds to participants. (2) At September 30, 2022 and December 31, 2021, the securities are included in Other current assets on the Company’s Condensed Consolidated Balance Sheets and are available for overnight cash settlement, if necessary, to fund current operations.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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