Retirement Savings Plans (Details) (USD $)	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Accrued compensation and benefits	$ 173,586,000	$ 152,790,000
Supplemental retirement savings plan obligations and other long-term liabilities	14,903,000	8,588,000	(1,240,000)	[1]
Rabbi Trust [Member] | Supplemental Savings Plan [Member]
Investment gains	8,900,000
Carrying value of investment	66,900,000
401 (k) Plan [Member]
Employee contribution to defined contribution plan	75.00%
Matching contribution percentage	50.00%
Matching contribution percentage of cash compensation	6.00%
Contribution expense	21,600,000	17,400,000	21,000,000
Employer's contributions vesting period (in years)	3
U.K. Defined Contribution Plan [Member]
Contributions by employer	1,500,000	1,500,000	1,300,000
Supplemental Savings Plan [Member]
Contribution expense	1,200,000	900,000	900,000
Contributions by employer	1,100,000
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 discretionary contribution percentage	5.00%
Compensation limit on contributions by employer	245,000
Obligations due to participants	67,200,000
Accrued compensation and benefits	2,300,000
Supplemental retirement savings plan obligations and other long-term liabilities	14,300,000
Investment gains	9,100,000
Participant compensation deferral	9,300,000
Distributions paid to participants	$ 5,200,000

[1] Certain amounts for the year ended June 30, 2009 have been adjusted to reflect the retroactive application of new accounting standards. See Note 3.