Statements of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash Flows from Operating Activities:
Net earnings	$ 1,013.0	$ 956.3
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	146.7	138.6
Amortization of deferred contract costs	298.6	281.4
Deferred income taxes	64.8	42.7
Stock-based compensation expense	58.7	60.6
Bad debt expense	10.3	11.2
Net pension income	(3.8)	(4.9)
Net accretion of discounts and amortization of premiums on available-for-sale securities	(22.5)	(15.5)
Other	2.5	0.9
Changes in operating assets and liabilities:
Decrease in accounts receivable	102.0	115.4
Increase in deferred contract costs	(271.4)	(269.8)
Increase in other assets	(342.4)	(217.1)
(Decrease)/increase in accounts payable	(38.0)	48.0
Decrease in accrued expenses and other liabilities	(376.2)	(323.4)
Net cash flows provided by operating activities	642.3	824.4
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	(3,604.6)	(2,771.7)
Proceeds from the sales and maturities of corporate and client funds marketable securities	1,896.0	1,266.8
Capital expenditures	(46.7)	(58.8)
Additions to intangibles	(94.1)	(80.9)
Acquisitions of businesses, net of cash acquired	0.5	0.0
Proceeds from the sale of property, plant, and equipment and other assets	0.0	3.3
Other	(13.7)	(3.1)
Net cash flows used in investing activities	(1,862.6)	(1,644.4)
Cash Flows from Financing Activities:
Net increase/(decrease) in client funds obligations	573.1	(10,870.5)
Net cash distributed from the Internal Revenue Service	(11.5)	(336.4)
Payments of debt	(0.3)	(0.3)
Proceeds from the issuance of debt	0.0	988.9
Settlement of cash flow hedges	0.0	(12.5)
Repurchases of common stock	(366.0)	(372.6)
Net (repurchases)/proceeds from stock-based compensation plans and stock purchase plan	(57.8)	12.0
Dividends paid	(626.7)	(572.6)
Net proceeds related to reverse repurchase agreements	214.8	297.1
Net proceeds from issuance of commercial paper	438.5	4,375.4
Net cash flows provided by/(used in) financing activities	164.1	(6,491.5)
Effect of exchange rate changes on cash, cash equivalents, restricted cash, and restricted cash equivalents	(6.7)	17.0
Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents	(1,062.9)	(7,294.5)
Cash, cash equivalents, restricted cash, and restricted cash equivalents, beginning of period	5,054.6	10,086.0
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of period	3,991.7	2,791.5
Supplemental disclosures of cash flow information:
Cash paid for interest	130.3	140.7
Cash paid for income taxes, net of income tax refunds	$ 73.8	$ 64.7