Discontinued Agribusiness Operations - Narrative (Details) $ in Millions	3 Months Ended
	Sep. 30, 2015 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross selling price	$ 105.3
Debt	80.9
Selling and other related costs	5.9
Net proceeds	18.4
Escrow deposit	10.2
Indemnification Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow deposit	$ 6.0
Period of guarantee	5 years
Performance Guarantee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow deposit	$ 4.2
Performance Guarantee, Air Quality
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow deposit	2.4
Performance Guarantee, Waste Water
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow deposit	1.8
Maximum | Indemnification Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnification claims guaranteed in excess of escrow	$ 8.0