Fair Value Measurements - Schedule of carrying amounts and estimated fair values of financial instruments not recorded at fair value in the financial statements (Details) - Level 2 - USD ($) $ in Millions |
Mar. 31, 2016 |
Jun. 30, 2015 |
---|---|---|
Carrying Value | ||
Carrying amounts and estimated fair values of financial instruments not recorded at fair value | ||
Long-term debt | $ 612.9 | $ 607.1 |
Company-owned life insurance | 12.2 | 13.0 |
Fair Value | ||
Carrying amounts and estimated fair values of financial instruments not recorded at fair value | ||
Long-term debt | 588.8 | 628.6 |
Company-owned life insurance | $ 12.2 | $ 13.0 |