Derivatives and Hedging Activities - Narrative (Details) lb in Millions	3 Months Ended
	Sep. 30, 2019 USD ($) lb	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)
Fair value of derivatives
Total asset derivatives on a gross basis	$ 39,200,000
Total liability derivatives on a gross basis	17,400,000
Cash collateral held by counterparties	0		$ 0
Net derivative losses included in AOCI expected to be reclassified into earnings	$ 10,100,000
Cash flow hedges | Commodity contracts
Fair value of derivatives
Amounts of raw materials to be purchased from forward contracts (in pounds) | lb	17.3
Fair value hedging | Interest Rate Swaps
Fair value of derivatives
Total notional amounts of interest rate contracts	$ 150,000,000.0		$ 150,000,000
Interest expense | Cash flow hedges | Interest Rate Swaps
Fair value of derivatives
Net gains (losses) recorded as a reduction to interest expense	100,000	$ 100,000
Interest expense | Fair value hedging | Interest Rate Swaps
Fair value of derivatives
Net gains (losses) recorded as a reduction to interest expense	$ 0.0	$ (300,000)