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Significant Accounting Policies - Narrative (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 9 Months Ended
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Dec. 31, 2013 | Jun. 30, 2014
Accounting Policies [Abstract] |  |
French Tax Law Change, Corporate Surtax Rate Increase, Term | 2 years |
Significant Accounting Policies (Textual) [Abstract] |  |
Ownership interests in certain subsidiaries under equity method investment, maximum |  | 100.00%
Voting rights in investment businesses not traded publicly accounted for under the cost method, Maximum |  | 20.00%
Impact of French Tax Law Change |  | $ 5.7

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- Definition French Tax Law Change, Corporate Surtax Rate Increase, Term + References No definition available. + Details
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- Definition Ownership interests in certain subsidiaries under equity method investment, maximum + References No definition available. + Details
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- Definition Voting rights in investment businesses not traded publicly accounted for under the cost method, Maximum + References No definition available. + Details
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