Statements Of Consolidated Cash Flows - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2016
Cash Flows from Operating Activities:
NET EARNINGS		$ 1,620.8	$ 1,733.4		$ 1,492.5
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization		377.6	316.1	[1]	288.6	[1]
Deferred income taxes		0.5	10.0	[1]	0.7	[1]
Stock-based compensation expense		175.4	138.9	[1]	137.6	[1]
Net pension expense		330.4	24.2	[1]	17.7	[1]
Net amortization of premiums and accretion of discounts on available-for-sale securities		71.5	85.9	[1]	94.1	[1]
Gain on sale of assets		(0.4)	0.0	[1]	(13.9)	[1]
Gain on sale of divested businesses, net of tax		0.0	(121.4)	[1]	(21.8)	[1]
Other		31.9	37.1	[1]	30.7	[1]
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
(Increase)/decrease in accounts receivable		(291.8)	23.4	[1]	(224.6)	[1]
Decrease/(increase) in other assets		93.5	(269.1)	[1]	(108.9)	[1]
Decrease in accounts payable		(1.9)	(11.6)	[1]	(15.9)	[1]
Increase in accrued expenses and other liabilities		107.7	159.0	[1]	220.5	[1]
Net cash flows provided by operating activities		2,515.2	2,125.9	[1]	1,897.3	[1]
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities		(4,876.8)	(4,382.8)	[1]	(5,876.3)	[1]
Proceeds from the sales and maturities of corporate and client funds marketable securities		3,455.0	3,593.6	[1]	5,215.4	[1]
Net decrease/(increase) in restricted cash and cash equivalents held to satisfy client funds obligations			0.0		0.0
Capital expenditures		(206.1)	(240.2)	[1]	(168.5)	[1]
Additions to intangibles		(264.7)	(230.4)	[1]	(217.5)	[1]
Acquisitions of businesses, net of cash acquired		(612.4)	(87.4)	[1]	0.0	[1]
Proceeds from the sale of property, plant, and equipment and other assets		0.4	0.0	[1]	15.7	[1]
Proceeds from the sale of divested businesses		0.0	234.0	[1]	162.2	[1]
Net cash flows used in investing activities		(2,504.6)	(1,113.2)	[1]	(869.0)	[1]
Cash Flows from Financing Activities:
Net increase/(decrease) in client funds obligations		340.4	(6,120.6)	[1]	8,803.3	[1]
Proceeds from debt issuance		0.0	0.0	[1]	1,998.3	[1]
Payments of debt		(7.3)	(2.0)	[1]	(1.5)	[1]
Repurchases of common stock		(989.3)	(1,259.6)	[1]	(1,155.7)	[1]
Net proceeds from stock purchase plan and stock-based compensation plans		69.3	95.7	[1]	75.3	[1]
Dividends paid		(1,063.7)	(995.2)	[1]	(943.6)	[1]
Other		(5.3)	0.0	[1]	(23.4)	[1]
Net cash flows (used in)/provided by financing activities		(1,655.9)	(8,281.7)	[1]	8,752.7	[1]
Effect of exchange rate changes on cash, cash equivalents, restricted cash, and restricted cash equivalents		5.8	(8.0)	[1]	(8.7)	[1]
Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents		(1,639.5)	(7,277.0)	[1]	9,772.3	[1]
Cash, cash equivalents, restricted cash, and restricted cash equivalents, beginning of year	[1]	8,181.6	15,458.6		5,686.3
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of year		6,542.1	8,181.6	[1]	15,458.6	[1]
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	[1]	8,181.6	15,458.6		5,686.3
Cash paid for interest		100.5	78.1	[1]	37.5	[1]
Cash paid for income taxes, net of income tax refunds		$ 529.7	$ 817.1	[1]	$ 651.6	[1]

[1] See Note 1 for a summary of adjustments.