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Other Non-Current Assets - Schedule of Other Non-Current Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Other Noncurrent Assets [Line Items]    
Deferred client conversion and start-up costs $ 123.1 $ 115.9
Deferred data center costs 51.5 52.2
Long-term investments 17.7 12.6
Long-term broker fees 10.3 11.4
Other 14.1 15.8
Total $ 216.7 $ 207.9