Consolidating Financial Information Additional Information (Details) $ in Millions	Jun. 30, 2017 USD ($)
Asset Management segment [Member]
Condensed Financial Statements, Captions [Line Items]
Fair Value, Net Asset (Liability)	$ 84.4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
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