Fair Value Measurements (Tables)

6 Months Ended

Dec. 31, 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 December 31, 2012.  Included in the table are available-for-sale securities within corporate investments of $126.3 million and funds held for clients of $18,330.0 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	$	—	$	6,792.5	$	—	$	6,792.5
Corporate bonds	—		7,355.9		—		7,355.9
Canadian provincial bonds	—		696.2		—		696.2
Asset-backed securities	—		786.0		—		786.0
Municipal bonds	—		552.7		—		552.7
Canadian government obligations and Canadian government agency obligations	—		1,056.4		—		1,056.4
Other securities	16.7		1,199.9		—		1,216.6
Total available-for-sale securities	$	16.7	$	18,439.6	$	—	$	18,456.3

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