Retirement Savings Plans (Details) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued compensation and benefits	$ 180,871,000	$ 173,586,000
Supplemental retirement savings plan obligations and other long-term liabilities	12,092,000	14,903,000	8,588,000
401 (k) Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee contribution to defined contribution plan	75.00%
Matching contribution percentage	50.00%
Matching contribution percentage of cash compensation	6.00%
Contribution expense	26,100,000	21,600,000	17,400,000
Employer's contributions vesting period (in years)		3
U.K. Defined Contribution Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions by employer	1,800,000	1,500,000	1,500,000
Supplemental Savings Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution expense	1,200,000	1,200,000	900,000
Contributions by employer	1,400,000
Employee contribution percentage	50.00%
Employee contribution percentage of bonus and commission	100.00%
Employee contribution percentage that exceed limit set forth in defined contribution plan	5.00%
Employer's contributions vesting period (in years)	5
Compensation limit on contributions by employer	250,000
Obligations due to participants	76,600,000
Accrued compensation and benefits	3,400,000
Supplemental retirement savings plan obligations and other long-term liabilities	9,300,000
Investment gains	1,400,000
Participant compensation deferral	12,200,000
Distributions paid to participants	5,700,000
Rabbi Trust [Member] | Supplemental Savings Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Investment gains	1,200,000
Carrying value of investment	$ 77,400,000