Employee Retirement Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
AUSTRALIA
Percentage of contribution by the company to the retirement plans	9.00%
Total contribution by the company to the employee retirement plans	$ 10.3	$ 9.5	$ 8.2
UNITED KINGDOM
Percentage of contribution by the company to the retirement plans	5.00%
Total contribution by the company to the employee retirement plans	0.3	0.3	0.3
UNITED STATES
Percentage of contribution by the company to the retirement plans	4.00%
Total contribution by the company to the employee retirement plans	2.9	2.4	2.2
SWITZERLAND
Percentage of contribution by the company to the retirement plans	8.00%
Percentage of net return on accumulated contributions	2.00%
Period over which average percentage of company contribution was measured	3 years
Total contribution by the company to the employee retirement plans	$ 0.4	$ 0.4	$ 0.3