Statements Of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 2,776.6	$ 3,184.7
Cash Flows from Operating Activities:
NET EARNINGS	368.7	336.6
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	77.6	68.8
Deferred income taxes	31.9	29.4
Stock-based compensation expense	31.1	34.7
Net pension expense	6.1	4.4
Net amortization of premiums and accretion of discounts on available-for-sale securities	23.2	24.1
Gain on sale of divested businesses, net of tax	0.0	(21.8)
Other	8.2	5.8
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Decrease / (increase) in accounts receivable	121.0	(32.3)
Increase in other assets	(221.6)	(249.2)
Decrease in accounts payable	(36.3)	(19.5)
Decrease in accrued expenses and other liabilities	(80.1)	(71.9)
Net cash flows provided by operating activities	329.8	109.1
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	(1,171.1)	(859.8)
Proceeds from the sales and maturities of corporate and client funds marketable securities	900.1	1,255.3
Net decrease / (increase) in restricted cash and cash equivalents held to satisfy client funds obligations	9,160.8	(137.8)
Capital expenditures	(48.7)	(55.6)
Additions to intangibles	(57.2)	(45.4)
Acquisitions of businesses, net of cash acquired	(20.0)	0.0
Proceeds from the sale of divested businesses	0.0	162.5
Net cash flows provided by investing activities	8,763.9	319.2
Cash Flows from Financing Activities:
Net decrease in client funds obligations	(8,928.3)	(275.1)
Net proceeds from debt issuance	0.0	1,986.4
Payments of debt	(0.5)	(0.6)
Repurchases of common stock	(328.6)	(308.1)
Net proceeds from stock purchase plan and stock-based compensation plans	(14.4)	(22.0)
Dividends paid	(241.8)	(229.0)
Other	0.0	(23.4)
Net cash flows (used in) / provided by financing activities	(9,513.6)	1,128.2
Effect of exchange rate changes on cash and cash equivalents	5.4	(11.1)
Net change in cash and cash equivalents	(414.5)	1,545.4
Supplemental disclosures of cash flow information:
Cash paid for interest	33.4	2.4
Cash paid for income taxes, net of income tax refunds	$ 36.3	$ 18.7