Summary of Major Accounting Policies - Disposition (Details) $ in Millions	3 Months Ended
Sep. 30, 2018 USD ($)
Investment schedule [Abstract]
Proceeds from Sale of Other Investments	$ 15.1
Gain (Loss) on Disposition of Assets	$ 9.3

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

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