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Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Jun. 30, 2015
Goodwill |  |  |  |
Goodwill, Impairment Loss |  |  | $ 42.7 |
Goodwill [Roll Forward] |  |  |  |
Balance at June 30, 2015 (A) | [1] | $ 1,793.5 |  |
Transfer of AMD goodwill (see Note 15) |  | 0.0 |  |
Currency translation adjustments |  | (8.5) |  |
Disposition of AMD |  | (100.4) |  |
Balance at September 30, 2015 |  | 1,684.6 | 1,793.5 | [1]
Employer Services [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance at June 30, 2015 (A) | [1] | 1,788.7 |  |
Transfer of AMD goodwill (see Note 15) |  | (100.4) |  |
Currency translation adjustments |  | (8.5) |  |
Disposition of AMD |  | 0.0 |  |
Balance at September 30, 2015 |  | 1,679.8 | 1,788.7 | [1]
PEO Services [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance at June 30, 2015 (A) |  | 4.8 |  |
Transfer of AMD goodwill (see Note 15) |  | 0.0 |  |
Currency translation adjustments |  | 0.0 |  |
Disposition of AMD |  | 0.0 |  |
Balance at September 30, 2015 |  | 4.8 | 4.8 |
Other Segments [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance at June 30, 2015 (A) |  | 0.0 |  |
Transfer of AMD goodwill (see Note 15) |  | 100.4 |  |
Currency translation adjustments |  | 0.0 |  |
Disposition of AMD |  | (100.4) |  |
Balance at September 30, 2015 |  | $ 0.0 | $ 0.0 |
[1] | The goodwill balance at June 30, 2015 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.

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