Statements of Consolidated Cash Flows - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities:
Net earnings		$ 3,412.0	$ 2,948.9	$ 2,598.5
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization		549.3	515.1	510.7
Amortization of deferred contract costs		992.9	955.2	935.3
Deferred income taxes		(80.1)	36.6	(251.1)
Stock-based compensation expense		220.4	201.7	175.3
Net pension income		(42.6)	(53.4)	(52.8)
Net amortization of premiums and accretion of discounts on available-for-sale securities		23.0	101.0	69.5
Other		71.4	32.7	45.3
Changes in operating assets and liabilities:
Decrease/(Increase) in accounts receivable		129.2	(486.5)	(339.8)
Increase in other assets		(1,357.4)	(1,258.4)	(1,029.4)
(Decrease)/Increase in accounts payable		(11.8)	(16.4)	36.9
Increase in accrued expenses and other liabilities		301.3	123.0	394.9
Net cash flows provided by operating activities		4,207.6	3,099.5	3,093.3
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities		(6,618.8)	(10,733.2)	(9,266.3)
Proceeds from the sales and maturities of corporate and client funds marketable securities		4,705.5	4,249.7	6,238.4
Capital expenditures		(206.3)	(174.4)	(178.6)
Additions to intangibles		(365.3)	(379.0)	(327.3)
Acquisitions of businesses, net of cash acquired		(32.4)	(11.7)	0.0
Proceeds from the sale of property, plant, and equipment and other assets		0.0	34.2	18.8
Net cash flows used in investing activities		(2,517.3)	(7,014.4)	(3,515.0)
Cash Flows from Financing Activities:
Net (decrease)/increase in client funds obligations		(12,701.6)	17,057.9	8,336.2
Payments of debt		(1.0)	(0.9)	(1,001.8)
Proceeds from the issuance of debt		0.0	0.0	1,981.5
Settlement of cash flow hedges		0.0	0.0	(44.6)
Repurchases of common stock		(1,121.4)	(1,969.4)	(1,372.3)
Net proceeds from stock purchase plan and stock-based compensation plans		91.6	96.5	104.1
Dividends paid		(1,903.6)	(1,659.0)	(1,575.5)
Net (payments)/proceeds related to reverse repurchase agreements		(44.7)	128.3	9.9
Net cash flows (used in)/provided by financing activities		(15,680.7)	13,653.4	6,437.5
Effect of exchange rate changes on cash, cash equivalents, restricted cash, and restricted cash equivalents		(21.1)	(98.7)	73.8
Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents		(14,011.5)	9,639.8	6,089.6
Cash, cash equivalents, restricted cash, and restricted cash equivalents, beginning of year		22,783.0	13,143.2	7,053.6
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of year		8,771.5	22,783.0	13,143.2
Reconciliation of cash, cash equivalents, restricted cash, and restricted cash equivalents to the Consolidated Balance Sheets
Cash and cash equivalents		2,083.5	1,436.3	2,575.2
Restricted cash and restricted cash equivalents included in funds held for clients (A)	[1]	6,688.0	21,346.7	10,568.0
Total cash, cash equivalents, restricted cash, and restricted cash equivalents		8,771.5	22,783.0	13,143.2
Supplemental disclosures of cash flow information:
Cash paid for interest		246.5	74.8	53.1
Cash paid for income taxes, net of income tax refunds		$ 1,080.7	$ 856.8	$ 973.7

[1] See Note 4 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.