Loans to and Investments in Associated Companies (HomeFed, Narrative) (Details) - HomeFed - USD ($) $ in Millions	3 Months Ended
Aug. 31, 2019	Jun. 30, 2019
Investments In Associated Companies [Line Items]
Equity method investment, ownership percentage		70.00%
Maximum voting rights as a percentage of total voting securities voting		45.00%
Non-cash pre-tax gain on remeasurement of interest	$ 72.1

In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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