Statements Of Consolidated Cash Flows - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
NET EARNINGS	$ 678.0	$ 626.7
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	141.4	137.1
Deferred income taxes	36.7	(8.0)
Stock-based compensation expense	70.7	74.9
Excess tax benefit related to exercise of stock options and restricted stock	(22.7)	(48.4)
Net pension expense	8.8	9.8
Net amortization of premiums and accretion of discounts on available-for-sale securities	48.0	50.3
Gain on sale of building	(13.9)	0.0
Gain on sale of divested businesses, net of tax	(21.8)	0.0
Other	9.8	(8.5)
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable	(111.2)	(186.1)
Increase in other assets	(226.1)	(205.0)
Decrease in accounts payable	(18.0)	(9.6)
Decrease in accrued expenses and other liabilities	(87.0)	(49.0)
Proceeds from the sale of notes receivable	0.0	225.5
Operating activities of discontinued operations	0.0	(2.6)
Net cash flows provided by operating activities	492.7	607.1
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	(2,439.5)	(1,851.1)
Proceeds from the sales and maturities of corporate and client funds marketable securities	2,664.2	1,372.4
Net increase in restricted cash and cash equivalents held to satisfy client funds obligations	(6,063.2)	(13,380.9)
Capital expenditures	(99.4)	(80.4)
Additions to intangibles	(105.7)	(84.4)
Acquisitions of businesses, net of cash acquired	0.0	(8.1)
Proceeds from the sale of property, plant, and equipment and other assets	15.7	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	162.2	0.0
Investing activities of discontinued operations	0.0	(15.9)
Net cash flows used in investing activities	(5,865.7)	(13,379.8)
Cash Flows from Financing Activities:
Net increase in client funds obligations	5,793.6	15,721.5
Net proceeds from debt issuance	1,986.3	0.0
Payments of debt	(1.2)	(1.2)
Repurchases of common stock	(773.0)	(462.2)
Net proceeds from stock purchase plan and stock-based compensation plans	3.3	28.8
Excess tax benefit related to exercise of stock options and restricted stock	22.7	48.4
Dividends paid	(458.8)	(461.3)
Net repayments of commercial paper borrowings	0.0	(2,173.0)
Other	(23.4)	0.0
Financing activities of discontinued operations	0.0	1.6
Net cash flows provided by financing activities	6,549.5	12,702.6
Effect of exchange rate changes on cash and cash equivalents	(20.9)	(62.7)
Net change in cash and cash equivalents	1,155.6	(132.8)
Cash and cash equivalents, beginning of period	1,639.3	1,983.6
Cash and cash equivalents, end of period	2,794.9	1,850.8
Less cash and cash equivalents of discontinued operations, end of period	0.0	2.8
Cash and cash equivalents of continuing operations, end of period	$ 2,794.9	$ 1,848.0