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Investments - Narrative (Details) (Preferred Stock, USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Jun. 30, 2012
Preferred Stock
Schedule of Trading Securities and Other Trading Assets
Fair value of trading securities in unrealized gain position	$ 10.7		$ 7.3
Fair value of trading securities in unrealized loss position	$ 9.7	$ 13.2

- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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