Fair Value Measurements (Tables)

3 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Schedule Of Assets Measured At Fair Value On A Recurring Basis

The following table presents the Company's assets measured at fair value on a recurring basis at September 30, 2012.  Included in the table are available-for-sale securities within corporate investments of $558.1 million and funds held for clients of $17,858.9 million. Refer to Note 7 for additional disclosure in relation to corporate investments and funds held for clients.

	Level 1		Level 2		Level 3		Total
U.S Treasury and direct obligations of
U.S. government agencies	$	—	$	6,652.9	$	—	$	6,652.9
Corporate bonds	—		7,576.4		—		7,576.4
Canadian provincial bonds	—		693.5		—		693.5
Asset-backed securities	—		616.8		—		616.8
Municipal bonds	—		555.4		—		555.4
Canadian government obligations and
Canadian government agency obligations	—		1,063.4		—		1,063.4
Other securities	21.8		1,236.8		—		1,258.6
Total available-for-sale securities	$	21.8	$	18,395.2	$	—	$	18,417.0

The following table presents the Company’s assets measured at fair value on a recurring basis at June 30, 2012. Included in the table are available-for-sale securities within corporate investments of $117.3 million and funds held for clients of $17,976.1 million.

	Level 1		Level 2		Level 3		Total
U.S Treasury and direct obligations of
U.S. government agencies	$	—	$	6,674.6	$	—	$	6,674.6
Corporate bonds	—		7,368.0		—		7,368.0
Canadian provincial bonds	—		655.9		—		655.9
Asset-backed securities	—		548.4		—		548.4
Municipal bonds	—		552.9		—		552.9
Canadian government obligations and
Canadian government agency obligations	—		1,017.0		—		1,017.0
Other securities	20.6		1,256.0		—		1,276.6
Total available-for-sale securities	$	20.6	$	18,072.8	$	—	$	18,093.4