Statements Of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Cash Flows [Abstract]
NET EARNINGS	$ 336.6	$ 295.2
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	68.8	67.7
Deferred income taxes	29.4	9.3
Stock-based compensation expense	34.7	38.7
Excess tax benefit related to exercise of stock options and restricted stock	(15.9)	(44.2)
Net pension expense	4.4	5.8
Net amortization of premiums and accretion of discounts on available-for-sale securities	24.1	25.3
Gain on sale of divested businesses, net of tax	(21.8)	0.0
Other	5.8	(6.9)
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
(Increase) / decrease in accounts receivable	(32.3)	27.8
Increase in other assets	(249.2)	(224.4)
Decrease in accounts payable	(19.5)	(9.1)
Decrease in accrued expenses and other liabilities	(71.9)	(12.4)
Proceeds from the sale of notes receivable	0.0	207.2
Operating activities of discontinued operations	0.0	(1.8)
Net cash flows provided by operating activities	93.2	378.2
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	(859.8)	(894.2)
Proceeds from the sales and maturities of corporate and client funds marketable securities	1,255.3	595.2
Net (increase) / decrease in restricted cash and cash equivalents held to satisfy client funds obligations	(137.8)	1.5
Capital expenditures	(55.6)	(36.1)
Additions to intangibles	(45.4)	(43.9)
Acquisitions of businesses, net of cash acquired	0.0	(8.1)
Proceeds from the sale of property, plant, and equipment and other assets	0.0	23.6
Dividend received from CDK Global, Inc.	0.0	825.0
Cash retained by CDK Global, Inc.	0.0	(180.0)
Proceeds from the sale of divested businesses	162.5	0.0
Investing activities of discontinued operations	0.0	(15.9)
Net cash flows provided by investing activities	319.2	267.1
Cash Flows from Financing Activities:
Net (decrease) / increase in client funds obligations	(275.1)	47.3
Net proceeds from debt issuance	1,986.4	0.0
Payments of debt	(0.6)	(0.6)
Repurchases of common stock	(308.1)	(61.2)
Net proceeds from stock purchase plan and stock-based compensation plans	(22.0)	16.5
Excess tax benefit related to exercise of stock options and restricted stock	15.9	44.2
Dividends paid	(229.0)	(229.8)
Net repayments of commercial paper borrowings	0.0	(236.0)
Other	(23.4)	0.0
Financing activities of discontinued operations	0.0	1.6
Net cash flows provided by / (used in) financing activities	1,144.1	(418.0)
Effect of exchange rate changes on cash and cash equivalents	(11.1)	(35.2)
Net change in cash and cash equivalents	1,545.4	192.1
Cash and cash equivalents, beginning of period	1,639.3	1,983.6
Cash and cash equivalents, end of period	3,184.7	2,175.7
Less cash and cash equivalents of discontinued operations, end of period	0.0	2.2
Cash and cash equivalents of continuing operations, end of period	$ 3,184.7	$ 2,173.5