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Fair Value Measurements - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments not Recorded at Fair Value in the Financial Statements (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Jun. 30, 2018
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Carrying Value |  |
Carrying amounts and estimated fair values of financial instruments not recorded at fair value |  |
Long-term debt | $ 550.6 | $ 545.7
Company-owned life insurance | 17.9 | 16.4
Fair Value |  |
Carrying amounts and estimated fair values of financial instruments not recorded at fair value |  |
Long-term debt | 560.6 | 558.3
Company-owned life insurance | $ 17.9 | $ 16.4

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
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