Asset Exchange Transaction (Details) - Asset Exchange Transaction $ in Millions	3 Months Ended
Sep. 30, 2019 USD ($) a
Nonmonetary Transaction [Line Items]
Area of acres exchanged (in acres)	16,000
Area of acres obtained in asset exchange (in acres)	16,000
Additional area of acres disposed of as consideration (in acres)	3,000
Loss from asset exchange transaction \| $	$ 13.9
Reimbursement liability recognized \| $	$ 38.1

Disclosure of the difference in values (gain (loss)) between the nonmonetary assets or liabilities exchanged with another entity inclusive of boot (small monetary consideration).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 845
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68069686&loc=d3e32049-108421

Name:	us-gaap_NonmonetaryTransactionGainLossRecognizedOnTransfer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration