Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash flow from operating activities:
Net income	$ 154.9	$ 147.8	$ 129.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	96.9	84.9	81.3
Stock-based compensation	20.1	17.9	15.3
Deferred income taxes	24.0	(16.1)	(14.7)
Fair value adjustment of contingent consideration	8.7	(7.4)	(0.8)
Excess tax benefit from stock-based compensation	(4.2)	(7.1)	(7.8)
Other non-cash items	(0.1)	2.1	(0.2)
Changes in assets and liabilities, net of effects from acquisitions:
Billed and unbilled accounts receivable	(122.1)	(24.5)	(23.1)
Prepaid expenses and other current assets	(17.9)	(3.1)	(10.8)
Other assets	1.6	(11.9)	6.8
Accounts payable	(20.8)	19.0	11.5
Deferred revenue	58.2	(33.7)	46.7
Accrued expenses and other current liabilities	32.7	9.7	28.9
Long-term income taxes payable, net of long-term income taxes receivable	21.1	(10.6)	13.1
Other liabilities	8.2	(9.2)	11.9
Net cash provided by operating activities	261.3	157.8	287.2
Cash flow from investing activities:
Purchases of marketable securities	0.0	0.0	(250.3)
Proceeds from sale of marketable securities	0.0	88.6	291.8
Purchases of property and equipment	(95.5)	(80.2)	(72.6)
Acquisition of businesses	(67.3)	(104.5)	(0.1)
Net cash used in investing activities	(162.8)	(96.1)	(31.2)
Cash flow from financing activities:
Proceeds from issuance of common stock, net of tax payments for cashless exercises	13.9	12.6	6.8
Payments for share repurchase	(200.0)	0.0	(154.9)
Excess tax benefit from stock-based compensation	4.2	7.1	7.8
Borrowings under credit agreement/facility	1,176.2	429.6	502.5
Repayments under credit agreement/facility	(1,028.9)	(422.5)	(590.0)
Borrowings under factoring agreement	0.0	0.0	4.5
Payments for contingent consideration	(9.9)	0.0	0.0
Payments for debt issuance costs	(1.0)	(0.6)	(0.7)
Net cash (used in) provided by financing activities	(45.5)	26.2	(224.0)
Effect of Exchange Rate on Cash and Cash Equivalents	(11.8)	(68.7)	12.1
Net increase in cash and cash equivalents	41.2	19.2	44.1
Cash and cash equivalents at beginning of year	207.4	188.2	144.1
Cash and cash equivalents at end of year	248.6	207.4	188.2
Supplemental disclosures of cash flow information
Non-cash capital expenditures	4.5	6.9	0.0
Non-cash debt settlement under factoring agreement	0.0	0.0	14.9
Interest	13.0	10.8	13.7
Income taxes, net of refunds	$ 19.7	$ 78.4	$ 61.0