v2.4.0.6

Other Non-Current Assets (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011
Other Noncurrent Assets [Line Items] |  |
Deferred client conversion and start-up costs | $ 115.9 | $ 125.8
Deferred Costs | 47.2 |
Note receivable from PWI |  | 20.6
Impairment charge on note receivable | 21.4 |
Accrued interest | 0.8 |
Number of PWI common shares received in connection with disposal of discontinued operations | 2,455,627 |
Other-than-temporary impairment charge | 12.5 |
Penson Worldwide, Inc. [Member] |  |
Other Noncurrent Assets [Line Items] |  |
Deferred client conversion and start-up costs | $ 47.2 |

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