Statements of Consolidated Cash Flows - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities:
Net earnings	$ 1,919.5	$ 1,737.8
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	289.7	281.6
Amortization of deferred contract costs	565.9	526.7
Deferred income taxes	32.5	22.5
Stock-based compensation expense	139.7	132.4
Bad debt expense	23.1	24.5
Net pension income	(9.8)	(11.6)
Net accretion of discounts and amortization of premiums on available-for-sale securities	(31.5)	(17.4)
Other	4.7	(7.6)
Changes in operating assets and liabilities:
Increase in accounts receivable	(94.7)	(382.3)
Increase in deferred contract costs	(565.3)	(538.0)
Increase in other assets	(271.0)	(313.6)
Increase/(Decrease) in accounts payable	82.4	(19.0)
Decrease in accrued expenses and other liabilities	(110.5)	(77.1)
Net cash flows provided by operating activities	1,974.7	1,358.9
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	(3,990.7)	(1,305.5)
Proceeds from the sales and maturities of corporate and client funds marketable securities	2,524.1	1,503.2
Capital expenditures	(98.2)	(94.1)
Additions to intangibles	(175.7)	(165.7)
Acquisitions of businesses, net of cash acquired	(1,160.6)	(33.6)
Proceeds from sale of property, plant, and equipment and other assets	3.3	26.4
Other	(4.5)	(8.5)
Net cash flows used in investing activities	(2,902.3)	(77.8)
Cash Flows from Financing Activities:
Net increase in client funds obligations	9,090.4	5,421.9
Net cash distributed from the Internal Revenue Service	(487.6)	0.0
Payments of debt	(0.6)	(0.5)
Proceeds from the issuance of debt	988.9	0.0
Settlement of cash flow hedges	(12.5)	0.0
Repurchases of common stock	(644.9)	(504.7)
Net proceeds from stock purchase plan and stock-based compensation plans	38.6	(17.5)
Dividends paid	(1,145.1)	(1,032.1)
Net proceeds related to reverse repurchase agreements	(344.7)	(51.0)
Net cash flows provided by financing activities	7,482.5	3,816.1
Effect of exchange rate changes on cash, cash equivalents, restricted cash, and restricted cash equivalents	(36.7)	10.6
Net change in cash, cash equivalents, restricted cash, and restricted cash equivalents	6,518.2	5,107.8
Cash, cash equivalents, restricted cash, and restricted cash equivalents, beginning of period	10,086.0	8,771.5
Cash, cash equivalents, restricted cash, and restricted cash equivalents, end of period	16,604.2	13,879.3
Supplemental disclosures of cash flow information:
Cash paid for interest	249.5	192.8
Cash paid for income taxes, net of income tax refunds	$ 583.5	$ 590.4