Depreciation and amortization

$ 5,048.4

$ 4,668.0

$ 9,881.1

$ 9,180.3

Costs of revenues:

Operating expenses

2,376.1

2,213.3

4,661.9

4,370.9

Research and development

239.5

228.7

472.1

465.1

126.9

119.6

242.2

240.9

TOTAL COSTS OF REVENUES

2,742.5

2,561.6

5,376.2

5,076.9

Selling, general, and administrative expenses

1,006.1

922.5

1,932.8

1,802.8

Interest expense

129.6

104.9

267.4

196.5

TOTAL EXPENSES

3,878.2

3,589.0

7,576.4

7,076.2

Other (income)/expense, net

(91.1)

(64.8)

(192.8)

(132.5)

EARNINGS BEFORE INCOME TAXES

1,261.3

1,143.8

2,497.5

2,236.6

Provision for income taxes

298.1

265.4

578.0

498.8

NET EARNINGS

$ 963.2

$ 878.4

$ 1,919.5

$ 1,737.8

BASIC EARNINGS PER SHARE (in USD per share)

$ 2.36

$ 2.14

$ 4.71

$ 4.22

DILUTED EARNINGS PER SHARE (in USD per share)

$ 2.35

$ 2.13

$ 4.69

$ 4.20

Basic weighted average shares outstanding (in shares)

407.6

411.1

407.7

411.4

Diluted weighted average shares outstanding (in shares)

409.0

412.5

409.3

414.0

Revenues, other than interest on funds held for clients and PEO revenues

REVENUES:

Interest on funds held for clients

$ 3,114.8

$ 2,898.6

$ 6,122.0

$ 5,741.4

REVENUES:

272.8

225.3

526.1

427.1

PEO Revenues

REVENUES:

Cash and cash equivalents

^[1]

$ 1,660.8

$ 1,544.1

$ 3,233.0

$ 3,011.8

[1]

Professional Employer Organization (“PEO”) revenues are net of direct pass-through costs, primarily consisting of payroll wages and payroll taxes of $19,420.8 million and $18,379.2 million for the three months ended December 31, 2024 and 2023, respectively, and $36,614.4 million and $34,373.8 million for the six months ended December 31, 2024 and 2023, respectively.

Statements of Consolidated Earnings (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Direct pass-through costs PEO revenues	$ 19,420.8	$ 18,379.2	$ 36,614.4	$ 34,373.8

Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net earnings	$ 963.2	$ 878.4	$ 1,919.5	$ 1,737.8
Other comprehensive income/(losses):
Currency translation adjustments	(101.0)	53.9	(51.8)	9.3
Unrealized net (losses)/gains on available-for-sale securities	(423.8)	860.5	440.5	709.9
Tax effect	94.2	(194.9)	(103.6)	(164.8)
Reclassification of realized net losses on available-for-sale securities to net earnings	0.6	2.0	0.8	4.0
Tax effect	(0.1)	(0.5)	(0.1)	(1.0)
Unrealized loss on cash flow hedging activities	0.0	0.0	(12.5)	0.0
Tax effect	0.0	0.0	3.1	0.0
Amortization of unrealized losses on cash flow hedging activities	1.4	1.1	2.5	2.2
Tax effect	(0.3)	(0.2)	(0.6)	(0.5)
Reclassification of pension liability adjustment to net earnings	0.7	0.9	1.8	1.9
Tax effect	(0.2)	(0.2)	(0.5)	(0.4)
Other comprehensive (loss)/income, net of tax	(428.5)	722.6	279.6	560.6
Comprehensive income	$ 534.7	$ 1,601.0	$ 2,199.1	$ 2,298.4

Consolidated Balance Sheets - USD ($)
shares in Millions, $ in Millions

Dec. 31, 2024

Jun. 30, 2024

Current assets:

$ 2,216.4

$ 2,913.4

Accounts receivable, net of allowance for doubtful accounts of $50.3 and $52.2, respectively

3,503.5

3,428.2

Other current assets

1,126.8

1,204.8

Total current assets before funds held for clients

6,846.7

7,546.4

Funds held for clients

47,407.7

37,996.1

Total current assets

54,254.4

45,542.5

Long-term receivables, net of allowance for doubtful accounts of $0.2 and $0.1, respectively

5.9

7.3

Property, plant and equipment, net

682.2

685.6

Operating lease right-of-use asset

342.9

370.6

Deferred contract costs

2,936.4

2,965.0

Other assets

951.9

1,102.1

Goodwill

3,183.9

2,353.6

Intangible assets, net

1,739.1

1,336.0

Total assets

64,096.7

54,362.7

Current liabilities:

Accounts payable

186.4

100.6

Accrued expenses and other current liabilities

3,088.7

3,349.0

Accrued payroll and payroll-related expenses

682.6

958.7

Dividends payable

621.6

566.4

Short-term deferred revenues

236.7

199.8

Obligations under reverse repurchase agreements

^[1]

0.0

385.4

Short-term debt

1,000.5

1.1

Income taxes payable

4.4

15.1

Total current liabilities before client funds obligations

5,820.9

5,576.1

Client funds obligations

48,482.2

39,503.9

Total current liabilities

54,303.1

45,080.0

Long-term debt

2,982.0

2,991.3

Operating lease liabilities

300.3

328.6

Other liabilities

999.3

990.8

Deferred income taxes

90.8

64.3

Long-term deferred revenues

343.1

360.1

Total liabilities

59,018.6

49,815.1

Commitments and contingencies (Note 14)

Stockholders' equity:

Preferred stock, $1.00 par value: authorized, 0.3 shares; issued, none

0.0

Common stock, $0.10 par value: authorized, 1,000.0 shares; issued, 638.7 shares at December 31, 2024 and June 30, 2024; outstanding, 406.9 and 408.1 shares at December 31, 2024 and June 30, 2024, respectively

63.9

Capital in excess of par value

2,619.6

2,406.9

Retained earnings

24,335.6

23,622.2

Treasury stock - at cost: 231.8 and 230.6 shares at December 31, 2024 and June 30, 2024, respectively

(20,412.3)

(19,737.1)

Accumulated other comprehensive (loss)/ income

(1,528.7)

(1,808.3)

Total stockholders’ equity

5,078.1

4,547.6

Total liabilities and stockholders’ equity

$ 64,096.7

$ 54,362.7

Common stock, shares issued (in shares)

638.7

[1]	As of June 30, 2024, $384.0 million of short-term marketable securities and $1.4 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, current	$ 50.3	$ 52.2
Allowance for doubtful accounts, long-term	$ 0.2	$ 0.1
Preferred stock, par value (in USD per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized (in shares)	300,000	300,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	638,700,000	638,700,000
Common stock, shares outstanding (in shares)	406,900,000	408,100,000
Treasury stock, shares (in shares)	231,800,000	230,600,000
Short-term marketable securities under reverse repurchase agreements		$ 384.0
Cash and cash equivalents under reverse repurchase agreements		$ 1.4

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

Statements of Consolidated Cash Flows (Parenthetical) - USD ($)
$ in Millions

Dec. 31, 2024

Jun. 30, 2024

Dec. 31, 2023

Jun. 30, 2023

Reconciliation of cash, cash equivalents, restricted cash, and restricted cash equivalents to the Consolidated Balance Sheets

Cash and cash equivalents

$ 2,216.4

$ 2,913.4

$ 1,641.3

Restricted cash and restricted cash equivalents included in funds held for clients

14,387.8

^[1]

7,172.6

12,238.0

^[1]

Total cash, cash equivalents, restricted cash, and restricted cash equivalents

$ 16,604.2

$ 10,086.0

$ 13,879.3

$ 8,771.5

[1]	See Note 7 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.

Basis of Presentation	6 Months Ended
Basis of Presentation	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Consolidated Financial Statements and footnotes thereto of Automatic Data Processing, Inc., its subsidiaries and variable interest entity (“ADP” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The Consolidated Financial Statements and footnotes thereto are unaudited. In the opinion of the Company’s management, the Consolidated Financial Statements reflect all adjustments, which are of a normal recurring nature, that are necessary for a fair presentation of the Company’s interim financial results. The Company has a grantor trust, which holds the majority of the funds provided by its clients pending remittance to employees of those clients, tax authorities, and other payees. The Company is the sole beneficial owner of the trust. The trust meets the criteria in Accounting Standards Codification (“ASC”) 810, “Consolidation” to be characterized as a variable interest entity (“VIE”). The Company has determined that it has a controlling financial interest in the trust because it has both (1) the power to direct the activities that most significantly impact the economic performance of the trust (including the power to make all investment decisions for the trust) and (2) the right to receive benefits that could potentially be significant to the trust (in the form of investment returns) and, therefore, consolidates the trust. Further information on these funds and the Company’s obligations to remit to its clients’ employees, tax authorities, and other payees is provided in Note 7, “Corporate Investments and Funds Held for Clients.” The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the assets, liabilities, revenue, expenses, and accumulated other comprehensive income that are reported in the Consolidated Financial Statements and footnotes thereto. Actual results may differ from those estimates. Interim financial results are not necessarily indicative of financial results for a full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2024 (“fiscal 2024”). Certain amounts from the prior year's financial statements have been reclassified in order to conform to the current year's presentation.

New Accounting Pronouncements

6 Months Ended

Dec. 31, 2024

Accounting Standards Update and Change in Accounting Principle [Abstract]

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

None.

Recently Issued Accounting Pronouncements


Standard	Description	Effective Date	Effect on Financial Statements or Other Significant Matters
ASU 2024-03 Disaggregation of Income Statement Expenses (Subtopic 220-40)	This update improves financial reporting by requiring enhanced disclosures of the expense captions in the Income Statement within the Notes to the financial statements.	June 30, 2028 (Fiscal 2028)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures	This update enhances the transparency and decision usefulness of income tax disclosures to better assess how an entity’s operations and related tax risks, tax planning and operational opportunities affect its tax rate and prospects for future cash flows.	June 30, 2026 (Fiscal 2026)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.
ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures	This update improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses and certain quantitative disclosures.	June 30, 2025 (Fiscal 2025)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476173/280-10-65-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479343/105-10-65-7

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483550/848-10-65-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480016/944-40-65-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 11.M.Q2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-5

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (i)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480528/815-20-65-6

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479654/326-10-65-4

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479654/326-10-65-4

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483194/926-20-65-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483194/926-20-65-2

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483194/926-20-65-2

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480530/250-10-S99-6

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 250
-Publisher FASB
-URI https://asc.fasb.org/250/tableOfContent

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Revenue from Contract with Customer [Abstract]

Revenue

6 Months Ended

Dec. 31, 2024

Revenue

Based upon similar operational and economic characteristics, the Company’s revenues are disaggregated by its three business pillars: Human Capital Management (“HCM”), HR Outsourcing (“HRO”), and Global Solutions (“Global”), with separate disaggregation for PEO zero-margin benefits pass-through revenues and client funds interest revenues. The Company believes these revenue categories depict how the nature, amount, timing, and uncertainty of its revenue and cash flows are affected by economic factors.

The following tables provide details of revenue by our business pillars, and include a reconciliation to the Company’s reportable segments:



	Three Months Ended				Six Months Ended
	December 31,				December 31,
Types of Revenues	2024		2023		2024		2023
HCM	$	2,131.9	$	1,975.2	$	4,157.3	$	3,889.4
HRO, excluding PEO zero-margin benefits pass-throughs	943.2		888.7		1,808.4		1,700.4
PEO zero-margin benefits pass-throughs	1,055.2		970.7		2,104.4		1,947.5
Global	645.3		608.1		1,284.9		1,215.9
Interest on funds held for clients	272.8		225.3		526.1		427.1
Total Revenues	$	5,048.4	$	4,668.0	$	9,881.1	$	9,180.3

Reconciliation of disaggregated revenue to our reportable segments for the three months ended December 31, 2024:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	2,134.4	$	—	$	(2.5)	$	2,131.9
HRO, excluding PEO zero-margin benefits pass-throughs	338.5		605.6		(0.9)		943.2
PEO zero-margin benefits pass-throughs	—		1,055.2		—		1,055.2
Global	645.3		—		—		645.3
Interest on funds held for clients	270.3		2.5		—		272.8
Total Segment Revenues	$	3,388.5	$	1,663.3	$	(3.4)	$	5,048.4

Reconciliation of disaggregated revenue to our reportable segments for the three months ended December 31, 2023:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	1,977.4	$	—	$	(2.2)	$	1,975.2
HRO, excluding PEO zero-margin benefits pass-throughs	316.4		573.4		(1.1)		888.7
PEO zero-margin benefits pass-throughs	—		970.7		—		970.7
Global	608.1		—		—		608.1
Interest on funds held for clients	223.3		2.0		—		225.3
Total Segment Revenues	$	3,125.2	$	1,546.1	$	(3.3)	$	4,668.0

Reconciliation of disaggregated revenue to our reportable segments for the six months ended December 31, 2024:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	4,162.0	$	—	$	(4.7)	$	4,157.3
HRO, excluding PEO zero-margin benefits pass-throughs	681.3		1,128.6		(1.5)		1,808.4
PEO zero-margin benefits pass-throughs	—		2,104.4		—		2,104.4
Global	1,284.9		—		—		1,284.9
Interest on funds held for clients	521.3		4.8		—		526.1
Total Segment Revenues	$	6,649.5	$	3,237.8	$	(6.2)	$	9,881.1

Reconciliation of disaggregated revenue to our reportable segments for the six months ended December 31, 2023:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	3,894.0	$	—	$	(4.6)	$	3,889.4
HRO, excluding PEO zero-margin benefits pass-throughs	638.5		1,064.3		(2.4)		1,700.4
PEO zero-margin benefits pass-throughs	—		1,947.5		—		1,947.5
Global	1,215.9		—		—		1,215.9
Interest on funds held for clients	423.2		3.9		—		427.1
Total Segment Revenues	$	6,171.6	$	3,015.7	$	(7.0)	$	9,180.3

Contract Balances

The timing of revenue recognition for HCM, HRO and Global is consistent with the invoicing of clients, as invoicing occurs in the period the services are provided. Therefore, the Company does not recognize a contract asset or liability resulting from the timing of revenue recognition and invoicing.

Changes in deferred revenues related to set up fees for the six months ended December 31, 2024 were as follows:


Contract Liability
Contract liability, July 1, 2024	$	491.6
Recognition of revenue included in beginning of year contract liability	(69.9)
Contract liability, net of revenue recognized on contracts during the period	60.9
Currency translation adjustments	(10.8)
Contract liability, December 31, 2024	$	471.8

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-15

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/606/tableOfContent

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Acquisition

6 Months Ended

Dec. 31, 2024

Acquisition

In October 2024, the Company acquired WorkForce Software, a premier workforce management solutions provider that specializes in supporting large, global enterprises, utilizing cash on hand. The results of WorkForce Software will be reported within the Company’s Employer Services segment. Pro forma information has not been presented because the effect of the acquisition is not material to the Company's consolidated financial results.

The following table reconciles the purchase price to the cash paid for the acquisition, net of cash acquired:


Purchase price	$	1,173.1
Less: cash acquired	(12.5)
Cash paid for acquisition of business, net of cash acquired	$	1,160.6

The preliminary allocation of the purchase price is based upon estimates and assumptions that are subject to change within the measurement period, which is one year from the acquisition date. The primary areas of the purchase price allocation that are not yet finalized relate to the measurement of certain assets and liabilities, including identifiable intangible assets, and the finalization of net working capital items included in the purchase price allocation. Accordingly, the measurement period for such purchase price allocations will end when the information becomes available but will not exceed twelve months from the date of acquisition.

The acquisition was accounted for using the acquisition method of accounting. The Company recognized assets acquired and liabilities assumed at their fair value as of the date of acquisition, with the excess recorded to goodwill. The preliminary purchase price allocation for WorkForce Software is as follows:


Cash	$	12.5
Accounts receivable, net of allowance for doubtful accounts	20.0
Identifiable intangible assets (1)	417.0
Goodwill	846.4
All other assets	21.9
Total assets acquired	$	1,317.8

Deferred revenue	$	39.6
Deferred income taxes	46.6
All other liabilities	58.5
Total liabilities assumed	$	144.7
Total net assets acquired	$	1,173.1

(1) Intangible assets are recorded at estimated fair value, as determined by management based on available information which includes an estimated valuation by an independent third-party. The fair values assigned to identifiable intangible assets were determined through the use of the income approach, specifically the relief from royalty and the multi-period excess earnings methods. The major assumptions used in arriving at the estimated identifiable intangible asset values included management’s estimates of future cash flows, discounted at an appropriate rate of return which are based on the weighted average cost of capital for both the Company and other market participants, projected customer attrition rates, as well as applicable royalty rates for comparable assets. The useful lives for intangible assets were determined based upon the remaining useful economic lives of the intangible assets that are expected to contribute directly or indirectly to the future cash flows. The estimated fair value of intangible assets and related useful lives as included in the estimated purchase price allocation include:


	Estimated Fair Value		Estimated Useful Life (in years)
Technology	$	200.0	7
Customer/Partner relationships	$	210.0	8
Tradename	$	7.0	4

The goodwill recorded as a result of the WorkForce Software transaction represents future economic benefits the Company expects to achieve as a result of the acquisition, including expected synergies along with the value of the assembled workforce. None of the goodwill resulting from the acquisition is tax deductible.

Earnings per Share (“EPS”)

6 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Earnings per Share (“EPS”)


	Basic		Effect of Employee Stock Option Shares	Effect of Employee Restricted Stock Shares	Diluted
Three Months Ended December 31, 2024
Net earnings	$	963.2			$	963.2
Weighted average shares (in millions)	407.6		0.6	0.8	409.0
EPS	$	2.36			$	2.35
Three Months Ended December 31, 2023
Net earnings	$	878.4			$	878.4
Weighted average shares (in millions)	411.1		0.8	0.6	412.5
EPS	$	2.14			$	2.13

Six Months Ended December 31, 2024
Net earnings	$	1,919.5			$	1,919.5
Weighted average shares (in millions)	407.7		0.7	0.9	409.3
EPS	$	4.71			$	4.69
Six Months Ended December 31, 2023
Net earnings	$	1,737.8			$	1,737.8
Weighted average shares (in millions)	411.4		0.9	1.7	414.0
EPS	$	4.22			$	4.20

For the three and six months ended December 31, 2024, there were no stock options excluded from the calculation of diluted earnings per share due to anti-dilution. For the three months ended December 31, 2023, there were 0.1 million stock options excluded from the calculation of diluted earnings per share due to anti-dilution. For the six months ended December 31, 2023, there were no stock options excluded from the calculation of diluted earnings per share due to anti-dilution.

Other (Income)/Expense, Net

6 Months Ended

Dec. 31, 2024

Other Income and Expenses [Abstract]

Other (Income)/Expense, Net


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Interest income on corporate funds	$	(83.9)	$	(56.9)	$	(175.5)	$	(103.4)


Realized losses on available-for-sale securities, net	0.6		2.0		0.8		4.0

Gain on sale of assets	—		(1.4)		(2.4)		(16.0)




Non-service components of pension income, net (see Note 12)	(7.8)		(8.5)		(15.7)		(17.1)
Other (income)/expense, net	$	(91.1)	$	(64.8)	$	(192.8)	$	(132.5)

Corporate Investments and Funds Held For Clients

6 Months Ended

Dec. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Corporate Investments and Funds Held for Clients

Corporate investments and funds held for clients at December 31, 2024 and June 30, 2024 were as follows:


	December 31, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value (A)
Type of issue:
Money market securities, cash and other cash equivalents	$	16,604.2	$	—	$	—	$	16,604.2
Available-for-sale securities:
Corporate bonds	17,699.9		17.1		(708.7)		17,008.3
U.S. Treasury securities	8,167.5		17.7		(99.0)		8,086.2
Canadian government obligations and Canadian government agency obligations	2,183.3		12.3		(51.7)		2,143.9
U.S. government agency securities	1,602.7		0.2		(118.1)		1,484.8
Asset-backed securities	1,600.5		8.3		(28.3)		1,580.5
Canadian provincial bonds	1,108.5		8.4		(42.6)		1,074.3
Commercial mortgage-backed securities	481.4		—		(28.4)		453.0
Other securities	1,250.6		2.1		(63.8)		1,188.9

Total available-for-sale securities	34,094.4		66.1		(1,140.6)		33,019.9

Total corporate investments and funds held for clients	$	50,698.6	$	66.1	$	(1,140.6)	$	49,624.1

(A) Included within available-for-sale securities are funds held for clients with fair value of $33,019.9 million. There are no corporate investments included within available-for-sale securities at December 31, 2024. All available-for-sale securities were included in Level 2 of the fair value hierarchy.


	June 30, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value (B)
Type of issue:
Money market securities, cash and other cash equivalents	$	10,086.0	$	—	$	—	$	10,086.0
Available-for-sale securities:
Corporate bonds	16,833.3		11.5		(944.8)		15,900.0
U.S. Treasury securities	7,701.2		9.0		(164.5)		7,545.7
Canadian government obligations and Canadian government agency obligations	2,130.7		1.7		(86.6)		2,045.8
U.S. government agency securities	1,645.0		0.5		(140.6)		1,504.9
Asset-backed securities	1,394.9		3.9		(43.0)		1,355.8
Canadian provincial bonds	1,116.3		2.3		(56.2)		1,062.4
Commercial mortgage-backed securities	535.9		—		(35.1)		500.8
Other securities	1,366.0		2.0		(75.9)		1,292.1

Total available-for-sale securities	32,723.3		30.9		(1,546.7)		31,207.5

Total corporate investments and funds held for clients	$	42,809.3	$	30.9	$	(1,546.7)	$	41,293.5

(B) Included within available-for-sale securities are corporate investments with fair values of $384.0 million and funds held for clients with fair values of $30,823.5 million. All available-for-sale securities were included in Level 2 of the fair value hierarchy.

For a description of the fair value hierarchy and the Company's fair value methodologies, including the use of an independent third-party pricing service, see Note 1 “Summary of Significant Accounting Policies” in the Company's Annual Report on Form 10-K for fiscal 2024. The Company concurred with and did not adjust the prices obtained from the independent pricing service. The Company had no available-for-sale securities included in Level 1 or Level 3 at December 31, 2024.

The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of December 31, 2024, are as follows:


	December 31, 2024
	Securities in Unrealized Loss Position Less Than 12 Months				Securities in Unrealized Loss Position Greater Than 12 Months				Total
	Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value
Corporate bonds	$	(51.8)	$	3,389.6	$	(656.9)	$	11,809.9	$	(708.7)	$	15,199.5
U.S. Treasury securities	(20.3)		2,677.3		(78.7)		2,754.4		(99.0)		5,431.7
Canadian government obligations and Canadian government agency obligations	(0.7)		266.8		(51.0)		1,311.2		(51.7)		1,578.0
U.S. government agency securities	(1.9)		113.0		(116.2)		1,346.8		(118.1)		1,459.8
Asset-backed securities	(3.0)		271.4		(25.3)		601.4		(28.3)		872.8
Canadian provincial bonds	(3.9)		166.5		(38.7)		612.7		(42.6)		779.2
Commercial mortgage-backed securities	(0.4)		25.5		(28.0)		427.6		(28.4)		453.1
Other securities	(3.9)		325.9		(59.9)		714.3		(63.8)		1,040.2
	$	(85.9)	$	7,236.0	$	(1,054.7)	$	19,578.3	$	(1,140.6)	$	26,814.3

The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2024, are as follows:


	June 30, 2024
	Securities in Unrealized Loss Position Less Than 12 Months				Securities in Unrealized Loss Position Greater Than 12 Months				Total
	Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value
Corporate bonds	$	(25.8)	$	2,173.6	$	(919.0)	$	12,413.4	$	(944.8)	$	14,587.0
U.S. Treasury securities	(23.1)		2,186.2		(141.4)		4,076.9		(164.5)		6,263.1
Canadian government obligations and Canadian government agency obligations	(0.9)		304.6		(85.7)		1,591.6		(86.6)		1,896.2
U.S. government agency securities	(0.7)		51.5		(139.9)		1,428.2		(140.6)		1,479.7
Asset-backed securities	(2.3)		351.4		(40.7)		668.0		(43.0)		1,019.4
Canadian provincial bonds	(1.3)		193.0		(54.9)		717.4		(56.2)		910.4
Commercial mortgage-backed securities	(0.5)		11.2		(34.6)		489.6		(35.1)		500.8
Other securities	(12.2)		288.5		(63.7)		864.8		(75.9)		1,153.3
	$	(66.8)	$	5,560.0	$	(1,479.9)	$	22,249.9	$	(1,546.7)	$	27,809.9

At December 31, 2024, corporate bonds include investment-grade debt securities with a wide variety of issuers, industries, and sectors, primarily carrying credit ratings of A and above, and have maturities ranging from January 2025 through September 2034.

At December 31, 2024, asset-backed securities include AAA-rated senior tranches of securities with predominantly prime collateral of fixed-rate auto loan, credit card, and equipment lease receivables with fair values of $751.9 million, $480.1 million, and $167.5 million, respectively. These securities are collateralized by the cash flows of the underlying pools of

receivables. The primary risk associated with these securities is the collection risk of the underlying receivables. All collateral on such asset-backed securities has performed as expected through December 31, 2024.

At December 31, 2024, U.S. government agency securities primarily include debt directly issued by Federal Farm Credit Banks and Federal Home Loan Banks with fair values of $960.2 million and $480.0 million, respectively. U.S. government agency securities represent senior, unsecured, non-callable debt that primarily carry ratings of Aaa by Moody's, and AA+ by Standard & Poor's, with maturities ranging from February 2025 through August 2034.

At December 31, 2024, U.S. government agency commercial mortgage-backed securities of $453.0 million include those issued by Federal Home Loan Mortgage Corporation and Federal National Mortgage Association.

At December 31, 2024, other securities primarily include municipal bonds, diversified with a variety of issuers, with credit ratings of A and above with fair values of $523.7 million, AA-rated United Kingdom Gilt securities of $293.9 million, and AAA-rated supranational bonds of $213.0 million.

Classification of corporate investments on the Consolidated Balance Sheets is as follows:


	December 31,		June 30,
	2024		2024
Corporate investments:
Cash and cash equivalents	$	2,216.4	$	2,913.4
Short-term marketable securities (a)	—		384.0
Long-term marketable securities (b)	—		—
Total corporate investments	$	2,216.4	$	3,297.4

(a) - Short-term marketable securities are included within Other current assets on the Consolidated Balance Sheets.

(b) - Long-term marketable securities are included within Other assets on the Consolidated Balance Sheets.

Funds held for clients represent assets that, based upon the Company's intent, are restricted for use solely for the purposes of satisfying the obligations to remit funds relating to the Company’s payroll and payroll tax filing services, which are classified as client funds obligations on our Consolidated Balance Sheets.

Funds held for clients have been invested in the following categories:


	December 31,		June 30,
	2024		2024
Funds held for clients:
Restricted cash and cash equivalents held to satisfy client funds obligations	$	14,387.8	$	7,172.6
Restricted short-term marketable securities held to satisfy client funds obligations	6,807.9		5,538.1
Restricted long-term marketable securities held to satisfy client funds obligations	26,212.0		25,285.4
Total funds held for clients	$	47,407.7	$	37,996.1

Client funds obligations represent the Company's contractual obligations to remit funds to satisfy clients' payroll, tax, and other payee payment obligations and are recorded on the Consolidated Balance Sheets at the time that the Company impounds funds from clients. The client funds obligations represent liabilities that will be repaid within one year of the balance sheet date. The Company has reported client funds obligations as a current liability on the Consolidated Balance Sheets totaling $48,482.2 million and $39,503.9 million at December 31, 2024 and June 30, 2024, respectively. The Company has classified funds held for clients as a current asset since these funds are held solely for the purpose of satisfying the client funds obligations. Of the Company’s funds held for clients at December 31, 2024 and June 30, 2024, $43,112.4 million and $34,940.0 million, respectively, are held in the grantor trust. The liabilities held within the trust are intercompany liabilities to other Company subsidiaries and are eliminated in consolidation.

The Company has reported the cash flows related to the purchases of corporate and client funds marketable securities and related to the proceeds from the sales and maturities of corporate and client funds marketable securities on a gross basis in the investing section of the Statements of Consolidated Cash Flows. The Company has reported the cash and cash equivalents related to client funds investments with original maturities of ninety days or less, within the beginning and ending balances of cash, cash equivalents, restricted cash, and restricted cash equivalents. The Company has reported the cash flows related to the

cash received from and paid on behalf of clients on a net basis within net increase / (decrease) in client funds obligations in the financing activities section of the Statements of Consolidated Cash Flows.

All available-for-sale securities were rated as investment grade at December 31, 2024.

Expected maturities of available-for-sale securities at December 31, 2024 are as follows:


One year or less	$	6,807.9
One year to two years	7,555.4
Two years to three years	4,061.8
Three years to four years	5,502.4
After four years	9,092.4
Total available-for-sale securities	$	33,019.9

Leases

6 Months Ended

Dec. 31, 2024

Leases [Abstract]

Leases

The Company records leases on the Consolidated Balance Sheets as operating lease right-of-use (“ROU”) assets, records the current portion of operating lease liabilities within accrued expenses and other current liabilities and, separately, records long-term operating lease liabilities. The difference between total ROU assets and total lease liabilities is primarily attributable to prepayments of our obligations and the recognition of various lease incentives.

The Company has entered into operating lease agreements for facilities and equipment. The Company's leases have remaining lease terms of up to approximately eleven years.

The components of operating lease expense were as follows:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Operating lease cost	$	27.3	$	32.2	$	54.8	$	66.2
Short-term lease cost	0.2		0.4		0.5		0.9
Variable lease cost	4.6		4.8		11.2		8.0
Total operating lease cost	$	32.1	$	37.4	$	66.5	$	75.1

The following table provides supplemental cash flow information related to the Company's leases:


	Six Months Ended
	December 31,
	2024		2023
Cash paid for operating lease liabilities	$	59.3	$	63.6
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$	31.7	$	45.8

Other information related to our operating lease liabilities is as follows:


	December 31,			June 30,
	2024			2024
Weighted-average remaining lease term (in years)	5			5
Weighted-average discount rate	3.4		%	3.3		%
Current operating lease liability	$	94.6		$	92.2

As of December 31, 2024, maturities of operating lease liabilities are as follows:


Six months ending June 30, 2025	$	55.2
Twelve months ending June 30, 2026	100.1
Twelve months ending June 30, 2027	87.1
Twelve months ending June 30, 2028	66.6
Twelve months ending June 30, 2029	44.4
Thereafter	77.7
Total undiscounted lease obligations	431.1
Less: Imputed interest	(36.2)
Net lease obligations	$	394.9

Goodwill and Intangible Assets, net

6 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, net

Changes in goodwill for the six months ended December 31, 2024 are as follows:


	Employer Services		PEO Services		Total
Balance at June 30, 2024	$	2,348.8	$	4.8	$	2,353.6
Additions and other adjustments	846.4		—		846.4
Currency translation adjustments	(16.1)		—		(16.1)

Balance at December 31, 2024	$	3,179.1	$	4.8	$	3,183.9

Components of intangible assets, net, are as follows:


	December 31,		June 30,
	2024		2024
Intangible assets:
Software and software licenses	$	4,098.6	$	3,803.7
Customer contracts and lists	1,420.0		1,181.6
Other intangibles	249.3		242.0
	5,767.9		5,227.3
Less accumulated amortization:
Software and software licenses	(2,743.5)		(2,642.6)
Customer contracts and lists	(1,042.9)		(1,007.6)
Other intangibles	(242.4)		(241.1)
	(4,028.8)		(3,891.3)
Intangible assets, net	$	1,739.1	$	1,336.0

Other intangibles consist primarily of purchased rights, trademarks and trade names (acquired directly or through acquisitions). All intangible assets have finite lives and, as such, are subject to amortization. The weighted average remaining useful life of the intangible assets is 6 years (6 years for software and software licenses, 5 years for customer contracts and lists, and 4 years for other intangibles). Amortization of intangible assets was $100.7 million and $94.5 million for the three months ended December 31, 2024 and 2023, respectively, and $189.7 million and $190.2 million for the six months ended December 31, 2024 and 2023, respectively.

Estimated future amortization expenses of the Company's existing intangible assets are as follows:


	Amount
Six months ending June 30, 2025	$	253.2
Twelve months ending June 30, 2026	$	362.3
Twelve months ending June 30, 2027	$	262.5
Twelve months ending June 30, 2028	$	220.6
Twelve months ending June 30, 2029	$	190.1
Twelve months ending June 30, 2030	$	148.8

Short-term Financing

6 Months Ended

Dec. 31, 2024

Short-term Financing

The Company has a $4.55 billion, 364-day credit agreement that matures in June 2025 with a one year term-out option. The Company also has a $2.25 billion, five year credit facility that matures in June 2028 that contains an accordion feature under which the aggregate commitment can be increased by $500 million, subject to the availability of additional commitments. In addition, the Company also has a five year, $3.5 billion credit facility maturing in June 2029 that contains an accordion feature under which the aggregate commitment can be increased by $500 million, subject to the availability of additional commitments. The interest rate applicable to committed borrowings is tied to SOFR, the effective federal funds rate, or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing. The Company is also required to pay facility fees on the credit agreements. The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary. The Company had no borrowings through December 31, 2024 under the credit agreements.

The Company's U.S. short-term funding requirements related to client funds are sometimes obtained on an unsecured basis through the issuance of commercial paper, rather than liquidating previously-collected client funds that have already been invested in available-for-sale securities. This commercial paper program provides for the issuance of up to $10.3 billion in aggregate maturity value. The Company’s commercial paper program is rated A-1+ by Standard & Poor’s, Prime-1 (“P-1”) by Moody’s and F1+ by Fitch. These ratings denote the highest quality commercial paper securities. Maturities of commercial paper can range from overnight to up to 364 days. At December 31, 2024 and June 30, 2024, the Company had no commercial paper borrowing outstanding. Details of the borrowings under the commercial paper program are as follows:


	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2024			2023			2024			2023
Average daily borrowings (in billions)	$	4.5		$	3.9		$	4.7		$	4.0
Weighted average interest rates	4.8		%	5.4		%	5.1		%	5.3		%
Weighted average maturity (approximately in days)	2 days			2 days			2 days			2 days

The Company’s U.S., Canadian and United Kingdom short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements, which are collateralized principally by government and government agency securities, rather than liquidating previously-collected client funds that have already been invested in available-for-sale securities. These agreements generally have terms ranging from overnight to up to five business days. At December 31, 2024, the Company had no outstanding obligations related to reverse repurchase agreements. At June 30, 2024, the Company had $385.4 million of outstanding obligations related to reverse repurchase agreements which were fully paid in early July 2024. The Company has $7.3 billion available on a committed basis under the U.S. reverse repurchase agreements. Details of the reverse repurchase agreements are as follows:


	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2024			2023			2024			2023
Average outstanding balances (in billions)	$	3.7		$	2.4		$	3.7		$	1.9
Weighted average interest rates	4.8		%	5.4		%	5.0		%	5.4		%

Debt

6 Months Ended

Dec. 31, 2024

Debt

The Company issued four series of fixed-rate notes with staggered maturities of 7 and 10 years totaling $4.0 billion (collectively the “Notes”). The Notes are senior unsecured obligations, and interest is payable in arrears, semi-annually.

During the first quarter ended September 30, 2024, the Company issued $1.0 billion of senior notes due in 2034 bearing a fixed interest rate of 4.450%. In connection with the senior notes issuance, the Company terminated several derivative contracts in place to hedge exposure in changes in benchmark interest rates for the senior notes issued with an aggregate notional amount totaling $1.0 billion (of which $400.0 million were executed during the three months ended September 30, 2024 and $600.0 million were executed on the day of issuance). Since these derivative contracts were classified as cash flow hedges, the unamortized loss of $12.5 million was deferred in accumulated other comprehensive income and will be amortized to earnings over the life of the issued Notes as the interest payments are made.

The principal amounts and associated effective interest rates of the Notes and other debt as of December 31, 2024 and June 30, 2024, are as follows:


Debt instrument	Effective Interest Rate	December 31, 2024		June 30, 2024

Fixed-rate 3.375% notes due September 15, 2025	3.47%	$	1,000.0	$	1,000.0
Fixed-rate 1.700% notes due May 15, 2028	1.85%	1,000.0		1,000.0
Fixed-rate 1.250% notes due September 1, 2030	1.83%	1,000.0		1,000.0
Fixed-rate 4.450% notes due September 9, 2034	4.75%	1,000.0		—
Other		3.5		4.1
		4,003.5		3,004.1
Less: current portion		(1,000.5)		(1.1)
Less: unamortized discount and debt issuance costs		(21.0)		(11.7)
Total long-term debt		$	2,982.0	$	2,991.3

The effective interest rates for the Notes include the interest on the Notes and amortization of the discount and debt issuance costs.

As of December 31, 2024, the fair value of the Notes, based on Level 2 inputs, was $3,688.6 million. For a description of the fair value hierarchy and the Company's fair value methodologies, including the use of an independent third-party pricing service, see Note 1 “Summary of Significant Accounting Policies” in the Company's Annual Report on Form 10-K for fiscal 2024.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 405
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477092/405-40-50-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/470/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1C

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I

Employee Benefit Plans

6 Months Ended

Dec. 31, 2024

Retirement Benefits [Abstract]

Employee Benefit Plans

A. Stock-based Compensation Plans

The Company's share-based compensation consists of stock options, time-based restricted stock, time-based restricted stock units, performance-based restricted stock, and performance-based restricted stock units. The Company also offers an employee stock purchase plan for eligible employees. Beginning in September 2022, the Company discontinued granting stock options, time-based restricted stock and performance-based restricted stock. Any such future awards will be grants of time-based restricted stock units and/or performance-based restricted stock units, depending on employee eligibility. Time-based restricted stock unit awards and performance-based restricted stock unit awards granted to employees with a home country of the United States are settled in stock, and for awards granted to employees with a home country outside the United States are generally settled in cash.

The Company currently utilizes treasury stock to satisfy stock option exercises, issuances under the Company's employee stock purchase plan, and restricted stock units. From time to time, the Company may repurchase shares of its common stock under its authorized share repurchase program. The Company repurchased 0.9 million and 1.1 million shares in the three months ended December 31, 2024 and 2023, respectively, and repurchased 2.4 million and 2.1 million shares in the six months ended December 31, 2024 and 2023. The Company considers several factors in determining when to execute share repurchases, including, among other things, actual and potential acquisition activity, cash balances and cash flows, issuances due to employee benefit plan activity, and market conditions.

The following table represents pre-tax stock-based compensation expense for the three and six months ended December 31, 2024 and 2023, respectively:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Operating expenses	$	9.2	$	7.4	$	18.3	$	14.8
Selling, general and administrative expenses	59.6		57.6		101.9		100.4
Research and development	10.3		8.6		19.5		17.2
Total stock-based compensation expense	$	79.1	$	73.6	$	139.7	$	132.4

B. Pension Plans

The components of net pension income were as follows:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023			2024		2023
Service cost – benefits earned during the period	$	1.5	$	1.3		$	3.0	$	2.6
Interest cost on projected benefits	21.9		21.1			43.7		42.3
Expected return on plan assets	(29.0)		(29.0)			(58.0)		(58.0)
Net amortization and deferral	0.7		0.8			1.5		1.5

Net pension income	$	(4.9)	$	(5.8)		$	(9.8)	$	(11.6)

Income Taxes	6 Months Ended
Income Taxes	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rate for the three months ended December 31, 2024 and 2023 was 23.6% and 23.2%, respectively. The increase in the effective tax rate is primarily due to a benefit for adjustments to prior year tax liabilities in the three months ended December 31, 2023, partially offset by a higher excess tax benefit on stock-based compensation in the three months ended December 31, 2024. The effective tax rate for the six months ended December 31, 2024 and 2023 was 23.1% and 22.3%, respectively. The increase in the effective tax rate is primarily due to a benefit for adjustments to prior year tax liabilities, lower reserves for uncertain tax positions and a valuation allowance release in the six months ended December 31, 2023.

The entire disclosure for income tax.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/740/tableOfContent

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In May 2020, a putative class action complaint was filed against ADP, TotalSource and related defendants in the U.S. District Court, District of New Jersey. The complaint asserts violations of the Employee Retirement Income Security Act of 1974 (“ERISA”) in connection with the ADP TotalSource Retirement Savings Plan’s fiduciary administrative and investment decision-making. The complaint seeks statutory and other unspecified monetary damages, injunctive relief and attorney’s fees. The Company is unable to estimate any reasonably possible loss, or range of loss, with respect to this matter. The Company is vigorously defending against this lawsuit. The Company is subject to various claims, litigation, and regulatory compliance matters in the normal course of business. When a loss is considered probable and reasonably estimable, the Company records a liability in the amount of its best estimate for the ultimate loss. Management currently believes that the resolution of these claims, litigation and regulatory compliance matters against us, individually or in the aggregate, will not have a material adverse impact on our consolidated results of operations, financial condition or cash flows. These matters are subject to inherent uncertainties and management's view of these matters may change in the future. It is not the Company’s business practice to enter into off-balance sheet arrangements. In the normal course of business, the Company may enter into contracts in which it makes representations and warranties that relate to the performance of the Company’s services and products. The Company does not expect any material losses related to such representations and warranties.

Stockholders' Equity

6 Months Ended

Dec. 31, 2024

Stockholders' Equity

Changes in stockholders' equity by component are as follows:


	Three Months Ended
	December 31, 2024
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at September 30, 2024	$	63.9	$	2,528.6	$	24,001.2	$	(20,144.9)	$	(1,100.2)	$	5,348.6
Net earnings	—		—		963.2		—		—		963.2
Other comprehensive income	—		—		—		—		(428.5)		(428.5)
Stock-based compensation expense	—		70.2		—		—		—		70.2
Issuances relating to stock compensation plans	—		20.8		—		6.5		—		27.3
Treasury stock acquired (0.9 million shares repurchased)	—		—		—		(273.9)		—		(273.9)
Dividends declared ($1.54 per share)	—		—		(628.8)		—		—		(628.8)

Balance at December 31, 2024	$	63.9	$	2,619.6	$	24,335.6	$	(20,412.3)	$	(1,528.7)	$	5,078.1


	Three Months Ended
	December 31, 2023
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at September 30, 2023	$	63.9	$	2,188.7	$	22,455.4	$	(18,767.4)	$	(2,467.8)	$	3,472.8
Net earnings	—		—		878.4		—		—		878.4
Other comprehensive income	—		—		—		—		722.6		722.6
Stock-based compensation expense	—		67.6		—		—		—		67.6
Issuances relating to stock compensation plans	—		6.6		—		0.3		—		6.9
Treasury stock acquired (1.1 million shares repurchased)	—		—		—		(252.0)		—		(252.0)
Dividends declared ($1.40 per share)	—		—		(576.7)		—		—		(576.7)

Balance at December 31, 2023	$	63.9	$	2,262.9	$	22,757.1	$	(19,019.1)	$	(1,745.2)	$	4,319.6


	Six Months Ended
	December 31, 2024
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at June 30, 2024	$	63.9	$	2,406.9	$	23,622.2	$	(19,737.1)	$	(1,808.3)	$	4,547.6
Net earnings	—		—		1,919.5		—		—		1,919.5
Other comprehensive income	—		—		—		—		279.6		279.6
Stock-based compensation expense	—		125.0		—		—		—		125.0
Issuances relating to stock compensation plans	—		87.7		—		56.2		—		143.9
Treasury stock acquired (2.4 million shares repurchased)	—		—		—		(731.4)		—		(731.4)
Dividends declared ($2.94 per share)	—		—		(1,206.1)		—		—		(1,206.1)

Balance at December 31, 2024	$	63.9	$	2,619.6	$	24,335.6	$	(20,412.3)	$	(1,528.7)	$	5,078.1


	Six Months Ended
	December 31, 2023
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at June 30, 2023	$	63.9	$	2,102.3	$	22,118.0	$	(18,469.3)	$	(2,305.8)	$	3,509.1
Net earnings	—		—		1,737.8		—		—		1,737.8
Other comprehensive income	—		—		—		—		560.6		560.6
Stock-based compensation expense	—		121.7		—		—		—		121.7
Issuances relating to stock compensation plans	—		38.9		—		49.7		—		88.6
Treasury stock acquired (2.1 million shares repurchased)	—		—		—		(599.5)		—		(599.5)
Dividends declared ($2.65 per share)	—		—		(1,098.7)		—		—		(1,098.7)

Balance at December 31, 2023	$	63.9	$	2,262.9	$	22,757.1	$	(19,019.1)	$	(1,745.2)	$	4,319.6

The entire disclosure for equity.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-6

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-6

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-16

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reclassifications out of Accumulated Other Comprehensive Income (“AOCI”)

6 Months Ended

Dec. 31, 2024

Reclassifications out of Accumulated Other Comprehensive Income (“AOCI”)

Changes in AOCI by component are as follows:


	Three Months Ended
	December 31, 2024
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at September 30, 2024	$	(329.6)	$	(511.3)		$	(28.6)		$	(230.7)		$	(1,100.2)
Other comprehensive income/(loss) before reclassification adjustments	(101.0)		(423.8)			—			—			(524.8)
Tax effect	—		94.2			—			—			94.2
Reclassification adjustments to net earnings	—		0.6		(A)	1.4		(C)	0.7		(B)	2.7
Tax effect	—		(0.1)			(0.3)			(0.2)			(0.6)

Balance at December 31, 2024	$	(430.6)	$	(840.4)		$	(27.5)		$	(230.2)		$	(1,528.7)


	Three Months Ended
	December 31, 2023
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at September 30, 2023	$	(385.4)	$	(1,824.6)		$	(22.5)		$	(235.3)		$	(2,467.8)
Other comprehensive income/(loss) before reclassification adjustments	53.9		860.5			—			—			914.4
Tax effect	—		(194.9)			—			—			(194.9)
Reclassification adjustments to net earnings	—		2.0		(A)	1.1		(C)	0.9		(B)	4.0
Tax effect	—		(0.5)			(0.2)			(0.2)			(0.9)

Balance at December 31, 2023	$	(331.5)	$	(1,157.5)		$	(21.6)		$	(234.6)		$	(1,745.2)


	Six Months Ended
	December 31, 2024
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at June 30, 2024	$	(378.8)	$	(1,178.0)		$	(20.0)		$	(231.5)		$	(1,808.3)
Other comprehensive income/(loss) before reclassification adjustments	(51.8)		440.5			(12.5)			—			376.2
Tax effect	—		(103.6)			3.1			—			(100.5)
Reclassification adjustments to net earnings	—		0.8		(A)	2.5		(C)	1.8		(B)	5.1
Tax effect	—		(0.1)			(0.6)			(0.5)			(1.2)

Balance at December 31, 2024	$	(430.6)	$	(840.4)		$	(27.5)		$	(230.2)		$	(1,528.7)


	Six Months Ended
	December 31, 2023
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at June 30, 2023	$	(340.8)	$	(1,705.6)		$	(23.3)		$	(236.1)		$	(2,305.8)
Other comprehensive income/(loss) before reclassification adjustments	9.3		709.9			—			—			719.2
Tax effect	—		(164.8)			—			—			(164.8)
Reclassification adjustments to net earnings	—		4.0		(A)	2.2		(C)	1.9		(B)	8.1
Tax effect	—		(1.0)			(0.5)			(0.4)			(1.9)

Balance at December 31, 2023	$	(331.5)	$	(1,157.5)		$	(21.6)		$	(234.6)		$	(1,745.2)

(A) Reclassification adjustments out of AOCI are included within Other (income)/expense, net, on the Statements of Consolidated Earnings.

(B) Reclassification adjustments out of AOCI are included in net pension (income)/expense (see Note 12).

(C) Reclassification adjustments out of AOCI are included in Interest expense on the Statements of Consolidated Earnings (see Note 11).

Interim Financial Data by Segment

6 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Interim Financial Data by Segment

Based upon similar economic and operational characteristics, the Company’s strategic business units have been aggregated into the following two reportable segments: Employer Services and PEO Services. The primary components of the “Other” segment are certain corporate overhead charges and expenses that have not been allocated to the reportable segments, including corporate functions, costs related to transformation, severance costs, non-recurring gains and losses, the elimination of intercompany transactions, interest expense and corporate interest income. Certain revenues and expenses are charged to the reportable segments at a standard rate for management reasons. Other costs are recorded based on management responsibility.

Segment Results:


	Revenues
	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Employer Services	$	3,388.5	$	3,125.2	$	6,649.5	$	6,171.6
PEO Services	1,663.3		1,546.1		3,237.8		3,015.7
Other	(3.4)		(3.3)		(6.2)		(7.0)
	$	5,048.4	$	4,668.0	$	9,881.1	$	9,180.3


	Earnings before Income Taxes
	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Employer Services	$	1,183.0	$	1,061.9	$	2,347.3	$	2,070.4
PEO Services	251.7		255.0		477.3		477.9
Other	(173.4)		(173.1)		(327.1)		(311.7)
	$	1,261.3	$	1,143.8	$	2,497.5	$	2,236.6

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 10: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/280/tableOfContent

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-21

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-21

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 963.2	$ 878.4	$ 1,919.5	$ 1,737.8

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-6

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-8

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 17: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-10

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-7

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483499/205-20-50-7

Reference 34: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 37: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Accounting Standards Update and Change in Accounting Principle [Abstract]

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

New Accounting Pronouncements (Policies)

6 Months Ended

Dec. 31, 2024

Basis of Presentation

The accompanying Consolidated Financial Statements and footnotes thereto of Automatic Data Processing, Inc., its subsidiaries and variable interest entity (“ADP” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The Consolidated Financial Statements and footnotes thereto are unaudited. In the opinion of the Company’s management, the Consolidated Financial Statements reflect all adjustments, which are of a normal recurring nature, that are necessary for a fair presentation of the Company’s interim financial results.

The Company has a grantor trust, which holds the majority of the funds provided by its clients pending remittance to employees of those clients, tax authorities, and other payees. The Company is the sole beneficial owner of the trust. The trust meets the criteria in Accounting Standards Codification (“ASC”) 810, “Consolidation” to be characterized as a variable interest entity (“VIE”). The Company has determined that it has a controlling financial interest in the trust because it has both (1) the power to direct the activities that most significantly impact the economic performance of the trust (including the power to make all investment decisions for the trust) and (2) the right to receive benefits that could potentially be significant to the trust (in the form of investment returns) and, therefore, consolidates the trust. Further information on these funds and the Company’s obligations to remit to its clients’ employees, tax authorities, and other payees is provided in Note 7, “Corporate Investments and Funds Held for Clients.”

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the assets, liabilities, revenue, expenses, and accumulated other comprehensive income that are reported in the Consolidated Financial Statements and footnotes thereto. Actual results may differ from those estimates. Interim financial results are not necessarily indicative of financial results for a full year. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2024 (“fiscal 2024”). Certain amounts from the prior year's financial statements have been reclassified in order to conform to the current year's presentation.

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

None.

Recently Issued Accounting Pronouncements


Standard	Description	Effective Date	Effect on Financial Statements or Other Significant Matters
ASU 2024-03 Disaggregation of Income Statement Expenses (Subtopic 220-40)	This update improves financial reporting by requiring enhanced disclosures of the expense captions in the Income Statement within the Notes to the financial statements.	June 30, 2028 (Fiscal 2028)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.
ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures	This update enhances the transparency and decision usefulness of income tax disclosures to better assess how an entity’s operations and related tax risks, tax planning and operational opportunities affect its tax rate and prospects for future cash flows.	June 30, 2026 (Fiscal 2026)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.
ASU 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures	This update improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses and certain quantitative disclosures.	June 30, 2025 (Fiscal 2025)	The Company is assessing this guidance. The adoption will modify disclosures but will not have an impact on the Company's consolidated results of operations, financial condition, and cash flows.

Revenue (Tables)

6 Months Ended

Dec. 31, 2024

Revenue from Contract with Customer [Abstract]

Summary of Disaggregation of Revenue

The following tables provide details of revenue by our business pillars, and include a reconciliation to the Company’s reportable segments:



	Three Months Ended				Six Months Ended
	December 31,				December 31,
Types of Revenues	2024		2023		2024		2023
HCM	$	2,131.9	$	1,975.2	$	4,157.3	$	3,889.4
HRO, excluding PEO zero-margin benefits pass-throughs	943.2		888.7		1,808.4		1,700.4
PEO zero-margin benefits pass-throughs	1,055.2		970.7		2,104.4		1,947.5
Global	645.3		608.1		1,284.9		1,215.9
Interest on funds held for clients	272.8		225.3		526.1		427.1
Total Revenues	$	5,048.4	$	4,668.0	$	9,881.1	$	9,180.3

Reconciliation of disaggregated revenue to our reportable segments for the three months ended December 31, 2024:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	2,134.4	$	—	$	(2.5)	$	2,131.9
HRO, excluding PEO zero-margin benefits pass-throughs	338.5		605.6		(0.9)		943.2
PEO zero-margin benefits pass-throughs	—		1,055.2		—		1,055.2
Global	645.3		—		—		645.3
Interest on funds held for clients	270.3		2.5		—		272.8
Total Segment Revenues	$	3,388.5	$	1,663.3	$	(3.4)	$	5,048.4

Reconciliation of disaggregated revenue to our reportable segments for the three months ended December 31, 2023:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	1,977.4	$	—	$	(2.2)	$	1,975.2
HRO, excluding PEO zero-margin benefits pass-throughs	316.4		573.4		(1.1)		888.7
PEO zero-margin benefits pass-throughs	—		970.7		—		970.7
Global	608.1		—		—		608.1
Interest on funds held for clients	223.3		2.0		—		225.3
Total Segment Revenues	$	3,125.2	$	1,546.1	$	(3.3)	$	4,668.0

Reconciliation of disaggregated revenue to our reportable segments for the six months ended December 31, 2024:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	4,162.0	$	—	$	(4.7)	$	4,157.3
HRO, excluding PEO zero-margin benefits pass-throughs	681.3		1,128.6		(1.5)		1,808.4
PEO zero-margin benefits pass-throughs	—		2,104.4		—		2,104.4
Global	1,284.9		—		—		1,284.9
Interest on funds held for clients	521.3		4.8		—		526.1
Total Segment Revenues	$	6,649.5	$	3,237.8	$	(6.2)	$	9,881.1

Reconciliation of disaggregated revenue to our reportable segments for the six months ended December 31, 2023:


Types of Revenues	Employer Services		PEO		Other		Total
HCM	$	3,894.0	$	—	$	(4.6)	$	3,889.4
HRO, excluding PEO zero-margin benefits pass-throughs	638.5		1,064.3		(2.4)		1,700.4
PEO zero-margin benefits pass-throughs	—		1,947.5		—		1,947.5
Global	1,215.9		—		—		1,215.9
Interest on funds held for clients	423.2		3.9		—		427.1
Total Segment Revenues	$	6,171.6	$	3,015.7	$	(7.0)	$	9,180.3

Summary of Contract with Customer, Liability

Changes in deferred revenues related to set up fees for the six months ended December 31, 2024 were as follows:


Contract Liability
Contract liability, July 1, 2024	$	491.6
Recognition of revenue included in beginning of year contract liability	(69.9)
Contract liability, net of revenue recognized on contracts during the period	60.9
Currency translation adjustments	(10.8)
Contract liability, December 31, 2024	$	471.8

Acquisition (Tables)

6 Months Ended

Dec. 31, 2024

Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]

Schedule of Estimated Purchase Price, Net of Cash Acquired

The following table reconciles the purchase price to the cash paid for the acquisition, net of cash acquired:


Purchase price	$	1,173.1
Less: cash acquired	(12.5)
Cash paid for acquisition of business, net of cash acquired	$	1,160.6

Schedule of Preliminary Purchase Price Allocation

The preliminary purchase price allocation for WorkForce Software is as follows:


Cash	$	12.5
Accounts receivable, net of allowance for doubtful accounts	20.0
Identifiable intangible assets (1)	417.0
Goodwill	846.4
All other assets	21.9
Total assets acquired	$	1,317.8

Deferred revenue	$	39.6
Deferred income taxes	46.6
All other liabilities	58.5
Total liabilities assumed	$	144.7
Total net assets acquired	$	1,173.1

(1) Intangible assets are recorded at estimated fair value, as determined by management based on available information which includes an estimated valuation by an independent third-party. The fair values assigned to identifiable intangible assets were determined through the use of the income approach, specifically the relief from royalty and the multi-period excess earnings methods. The major assumptions used in arriving at the estimated identifiable intangible asset values included management’s estimates of future cash flows, discounted at an appropriate rate of return which are based on the weighted average cost of capital for both the Company and other market participants, projected customer attrition rates, as well as applicable royalty rates for comparable assets. The useful lives for intangible assets were determined based upon the remaining useful economic lives of the intangible assets that are expected to contribute directly or indirectly to the future cash flows. The estimated fair value of intangible assets and related useful lives as included in the estimated purchase price allocation include:


	Estimated Fair Value		Estimated Useful Life (in years)
Technology	$	200.0	7
Customer/Partner relationships	$	210.0	8
Tradename	$	7.0	4

Schedule of Components of Finite-Lived Intangible Assets

The estimated fair value of intangible assets and related useful lives as included in the estimated purchase price allocation include:


	Estimated Fair Value		Estimated Useful Life (in years)
Technology	$	200.0	7
Customer/Partner relationships	$	210.0	8
Tradename	$	7.0	4

Components of intangible assets, net, are as follows:


	December 31,		June 30,
	2024		2024
Intangible assets:
Software and software licenses	$	4,098.6	$	3,803.7
Customer contracts and lists	1,420.0		1,181.6
Other intangibles	249.3		242.0
	5,767.9		5,227.3
Less accumulated amortization:
Software and software licenses	(2,743.5)		(2,642.6)
Customer contracts and lists	(1,042.9)		(1,007.6)
Other intangibles	(242.4)		(241.1)
	(4,028.8)		(3,891.3)
Intangible assets, net	$	1,739.1	$	1,336.0

Earnings per Share (“EPS”) (Tables)

6 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Schedule of Earnings per Share, Basic and Diluted


	Basic		Effect of Employee Stock Option Shares	Effect of Employee Restricted Stock Shares	Diluted
Three Months Ended December 31, 2024
Net earnings	$	963.2			$	963.2
Weighted average shares (in millions)	407.6		0.6	0.8	409.0
EPS	$	2.36			$	2.35
Three Months Ended December 31, 2023
Net earnings	$	878.4			$	878.4
Weighted average shares (in millions)	411.1		0.8	0.6	412.5
EPS	$	2.14			$	2.13

Six Months Ended December 31, 2024
Net earnings	$	1,919.5			$	1,919.5
Weighted average shares (in millions)	407.7		0.7	0.9	409.3
EPS	$	4.71			$	4.69
Six Months Ended December 31, 2023
Net earnings	$	1,737.8			$	1,737.8
Weighted average shares (in millions)	411.4		0.9	1.7	414.0
EPS	$	4.22			$	4.20

Other (Income)/Expense, Net (Tables)

6 Months Ended

Dec. 31, 2024

Other Income and Expenses [Abstract]

Schedule of Other (Income)/Expense, Net


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Interest income on corporate funds	$	(83.9)	$	(56.9)	$	(175.5)	$	(103.4)


Realized losses on available-for-sale securities, net	0.6		2.0		0.8		4.0

Gain on sale of assets	—		(1.4)		(2.4)		(16.0)




Non-service components of pension income, net (see Note 12)	(7.8)		(8.5)		(15.7)		(17.1)
Other (income)/expense, net	$	(91.1)	$	(64.8)	$	(192.8)	$	(132.5)

Corporate Investments and Funds Held for Clients (Tables)

6 Months Ended

Dec. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Summary of Debt Securities, Available-for-Sale

Corporate investments and funds held for clients at December 31, 2024 and June 30, 2024 were as follows:


	December 31, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value (A)
Type of issue:
Money market securities, cash and other cash equivalents	$	16,604.2	$	—	$	—	$	16,604.2
Available-for-sale securities:
Corporate bonds	17,699.9		17.1		(708.7)		17,008.3
U.S. Treasury securities	8,167.5		17.7		(99.0)		8,086.2
Canadian government obligations and Canadian government agency obligations	2,183.3		12.3		(51.7)		2,143.9
U.S. government agency securities	1,602.7		0.2		(118.1)		1,484.8
Asset-backed securities	1,600.5		8.3		(28.3)		1,580.5
Canadian provincial bonds	1,108.5		8.4		(42.6)		1,074.3
Commercial mortgage-backed securities	481.4		—		(28.4)		453.0
Other securities	1,250.6		2.1		(63.8)		1,188.9

Total available-for-sale securities	34,094.4		66.1		(1,140.6)		33,019.9

Total corporate investments and funds held for clients	$	50,698.6	$	66.1	$	(1,140.6)	$	49,624.1

(A) Included within available-for-sale securities are funds held for clients with fair value of $33,019.9 million. There are no corporate investments included within available-for-sale securities at December 31, 2024. All available-for-sale securities were included in Level 2 of the fair value hierarchy.


	June 30, 2024
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value (B)
Type of issue:
Money market securities, cash and other cash equivalents	$	10,086.0	$	—	$	—	$	10,086.0
Available-for-sale securities:
Corporate bonds	16,833.3		11.5		(944.8)		15,900.0
U.S. Treasury securities	7,701.2		9.0		(164.5)		7,545.7
Canadian government obligations and Canadian government agency obligations	2,130.7		1.7		(86.6)		2,045.8
U.S. government agency securities	1,645.0		0.5		(140.6)		1,504.9
Asset-backed securities	1,394.9		3.9		(43.0)		1,355.8
Canadian provincial bonds	1,116.3		2.3		(56.2)		1,062.4
Commercial mortgage-backed securities	535.9		—		(35.1)		500.8
Other securities	1,366.0		2.0		(75.9)		1,292.1

Total available-for-sale securities	32,723.3		30.9		(1,546.7)		31,207.5

Total corporate investments and funds held for clients	$	42,809.3	$	30.9	$	(1,546.7)	$	41,293.5

(B) Included within available-for-sale securities are corporate investments with fair values of $384.0 million and funds held for clients with fair values of $30,823.5 million. All available-for-sale securities were included in Level 2 of the fair value hierarchy.

Summary of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value

The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of December 31, 2024, are as follows:


	December 31, 2024
	Securities in Unrealized Loss Position Less Than 12 Months				Securities in Unrealized Loss Position Greater Than 12 Months				Total
	Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value
Corporate bonds	$	(51.8)	$	3,389.6	$	(656.9)	$	11,809.9	$	(708.7)	$	15,199.5
U.S. Treasury securities	(20.3)		2,677.3		(78.7)		2,754.4		(99.0)		5,431.7
Canadian government obligations and Canadian government agency obligations	(0.7)		266.8		(51.0)		1,311.2		(51.7)		1,578.0
U.S. government agency securities	(1.9)		113.0		(116.2)		1,346.8		(118.1)		1,459.8
Asset-backed securities	(3.0)		271.4		(25.3)		601.4		(28.3)		872.8
Canadian provincial bonds	(3.9)		166.5		(38.7)		612.7		(42.6)		779.2
Commercial mortgage-backed securities	(0.4)		25.5		(28.0)		427.6		(28.4)		453.1
Other securities	(3.9)		325.9		(59.9)		714.3		(63.8)		1,040.2
	$	(85.9)	$	7,236.0	$	(1,054.7)	$	19,578.3	$	(1,140.6)	$	26,814.3

The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2024, are as follows:


	June 30, 2024
	Securities in Unrealized Loss Position Less Than 12 Months				Securities in Unrealized Loss Position Greater Than 12 Months				Total
	Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses		Fair Market Value
Corporate bonds	$	(25.8)	$	2,173.6	$	(919.0)	$	12,413.4	$	(944.8)	$	14,587.0
U.S. Treasury securities	(23.1)		2,186.2		(141.4)		4,076.9		(164.5)		6,263.1
Canadian government obligations and Canadian government agency obligations	(0.9)		304.6		(85.7)		1,591.6		(86.6)		1,896.2
U.S. government agency securities	(0.7)		51.5		(139.9)		1,428.2		(140.6)		1,479.7
Asset-backed securities	(2.3)		351.4		(40.7)		668.0		(43.0)		1,019.4
Canadian provincial bonds	(1.3)		193.0		(54.9)		717.4		(56.2)		910.4
Commercial mortgage-backed securities	(0.5)		11.2		(34.6)		489.6		(35.1)		500.8
Other securities	(12.2)		288.5		(63.7)		864.8		(75.9)		1,153.3
	$	(66.8)	$	5,560.0	$	(1,479.9)	$	22,249.9	$	(1,546.7)	$	27,809.9

Classification of Corporate Investments on the Consolidated Balance Sheets

Classification of corporate investments on the Consolidated Balance Sheets is as follows:


	December 31,		June 30,
	2024		2024
Corporate investments:
Cash and cash equivalents	$	2,216.4	$	2,913.4
Short-term marketable securities (a)	—		384.0
Long-term marketable securities (b)	—		—
Total corporate investments	$	2,216.4	$	3,297.4

(a) - Short-term marketable securities are included within Other current assets on the Consolidated Balance Sheets.

(b) - Long-term marketable securities are included within Other assets on the Consolidated Balance Sheets.

Schedule of Investment of Funds Held for Clients

Funds held for clients have been invested in the following categories:


	December 31,		June 30,
	2024		2024
Funds held for clients:
Restricted cash and cash equivalents held to satisfy client funds obligations	$	14,387.8	$	7,172.6
Restricted short-term marketable securities held to satisfy client funds obligations	6,807.9		5,538.1
Restricted long-term marketable securities held to satisfy client funds obligations	26,212.0		25,285.4
Total funds held for clients	$	47,407.7	$	37,996.1

Schedule of Expected Maturities of Available-for-Sale Securities

Expected maturities of available-for-sale securities at December 31, 2024 are as follows:


One year or less	$	6,807.9
One year to two years	7,555.4
Two years to three years	4,061.8
Three years to four years	5,502.4
After four years	9,092.4
Total available-for-sale securities	$	33,019.9

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Schedule of Lessee, Operating Lease, Liability, Maturity

Leases (Tables)

6 Months Ended

Dec. 31, 2024

Leases [Abstract]

Schedule of Lease Cost

The components of operating lease expense were as follows:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Operating lease cost	$	27.3	$	32.2	$	54.8	$	66.2
Short-term lease cost	0.2		0.4		0.5		0.9
Variable lease cost	4.6		4.8		11.2		8.0
Total operating lease cost	$	32.1	$	37.4	$	66.5	$	75.1

The following table provides supplemental cash flow information related to the Company's leases:


	Six Months Ended
	December 31,
	2024		2023
Cash paid for operating lease liabilities	$	59.3	$	63.6
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$	31.7	$	45.8

Other information related to our operating lease liabilities is as follows:


	December 31,			June 30,
	2024			2024
Weighted-average remaining lease term (in years)	5			5
Weighted-average discount rate	3.4		%	3.3		%
Current operating lease liability	$	94.6		$	92.2

As of December 31, 2024, maturities of operating lease liabilities are as follows:


Six months ending June 30, 2025	$	55.2
Twelve months ending June 30, 2026	100.1
Twelve months ending June 30, 2027	87.1
Twelve months ending June 30, 2028	66.6
Twelve months ending June 30, 2029	44.4
Thereafter	77.7
Total undiscounted lease obligations	431.1
Less: Imputed interest	(36.2)
Net lease obligations	$	394.9

Goodwill and Intangible Assets, net (Tables)

6 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Goodwill

Changes in goodwill for the six months ended December 31, 2024 are as follows:


	Employer Services		PEO Services		Total
Balance at June 30, 2024	$	2,348.8	$	4.8	$	2,353.6
Additions and other adjustments	846.4		—		846.4
Currency translation adjustments	(16.1)		—		(16.1)

Balance at December 31, 2024	$	3,179.1	$	4.8	$	3,183.9

Schedule of Components of Finite-Lived Intangible Assets

The estimated fair value of intangible assets and related useful lives as included in the estimated purchase price allocation include:


	Estimated Fair Value		Estimated Useful Life (in years)
Technology	$	200.0	7
Customer/Partner relationships	$	210.0	8
Tradename	$	7.0	4

Components of intangible assets, net, are as follows:


	December 31,		June 30,
	2024		2024
Intangible assets:
Software and software licenses	$	4,098.6	$	3,803.7
Customer contracts and lists	1,420.0		1,181.6
Other intangibles	249.3		242.0
	5,767.9		5,227.3
Less accumulated amortization:
Software and software licenses	(2,743.5)		(2,642.6)
Customer contracts and lists	(1,042.9)		(1,007.6)
Other intangibles	(242.4)		(241.1)
	(4,028.8)		(3,891.3)
Intangible assets, net	$	1,739.1	$	1,336.0

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated future amortization expenses of the Company's existing intangible assets are as follows:


	Amount
Six months ending June 30, 2025	$	253.2
Twelve months ending June 30, 2026	$	362.3
Twelve months ending June 30, 2027	$	262.5
Twelve months ending June 30, 2028	$	220.6
Twelve months ending June 30, 2029	$	190.1
Twelve months ending June 30, 2030	$	148.8

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Short-term Financing (Tables)

6 Months Ended

Dec. 31, 2024

Schedule of Borrowings under Commercial Paper Program

Details of the borrowings under the commercial paper program are as follows:


	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2024			2023			2024			2023
Average daily borrowings (in billions)	$	4.5		$	3.9		$	4.7		$	4.0
Weighted average interest rates	4.8		%	5.4		%	5.1		%	5.3		%
Weighted average maturity (approximately in days)	2 days			2 days			2 days			2 days

Schedule of Reverse Repurchase Agreements

Details of the reverse repurchase agreements are as follows:


	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2024			2023			2024			2023
Average outstanding balances (in billions)	$	3.7		$	2.4		$	3.7		$	1.9
Weighted average interest rates	4.8		%	5.4		%	5.0		%	5.4		%

Debt (Tables)

6 Months Ended

Dec. 31, 2024

Schedule of Long Term Debt

The principal amounts and associated effective interest rates of the Notes and other debt as of December 31, 2024 and June 30, 2024, are as follows:


Debt instrument	Effective Interest Rate	December 31, 2024		June 30, 2024

Fixed-rate 3.375% notes due September 15, 2025	3.47%	$	1,000.0	$	1,000.0
Fixed-rate 1.700% notes due May 15, 2028	1.85%	1,000.0		1,000.0
Fixed-rate 1.250% notes due September 1, 2030	1.83%	1,000.0		1,000.0
Fixed-rate 4.450% notes due September 9, 2034	4.75%	1,000.0		—
Other		3.5		4.1
		4,003.5		3,004.1
Less: current portion		(1,000.5)		(1.1)
Less: unamortized discount and debt issuance costs		(21.0)		(11.7)
Total long-term debt		$	2,982.0	$	2,991.3

Employee Benefit Plans (Tables)

6 Months Ended

Dec. 31, 2024

Retirement Benefits [Abstract]

Summary of Components of Stock-Based Compensation Expense

The following table represents pre-tax stock-based compensation expense for the three and six months ended December 31, 2024 and 2023, respectively:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Operating expenses	$	9.2	$	7.4	$	18.3	$	14.8
Selling, general and administrative expenses	59.6		57.6		101.9		100.4
Research and development	10.3		8.6		19.5		17.2
Total stock-based compensation expense	$	79.1	$	73.6	$	139.7	$	132.4

Summary of Net Benefit Costs

The components of net pension income were as follows:


	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023			2024		2023
Service cost – benefits earned during the period	$	1.5	$	1.3		$	3.0	$	2.6
Interest cost on projected benefits	21.9		21.1			43.7		42.3
Expected return on plan assets	(29.0)		(29.0)			(58.0)		(58.0)
Net amortization and deferral	0.7		0.8			1.5		1.5

Net pension income	$	(4.9)	$	(5.8)		$	(9.8)	$	(11.6)

Stockholders' Equity (Tables)

6 Months Ended

Dec. 31, 2024

Schedule of Components of Stockholders' Equity

Changes in stockholders' equity by component are as follows:


	Three Months Ended
	December 31, 2024
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at September 30, 2024	$	63.9	$	2,528.6	$	24,001.2	$	(20,144.9)	$	(1,100.2)	$	5,348.6
Net earnings	—		—		963.2		—		—		963.2
Other comprehensive income	—		—		—		—		(428.5)		(428.5)
Stock-based compensation expense	—		70.2		—		—		—		70.2
Issuances relating to stock compensation plans	—		20.8		—		6.5		—		27.3
Treasury stock acquired (0.9 million shares repurchased)	—		—		—		(273.9)		—		(273.9)
Dividends declared ($1.54 per share)	—		—		(628.8)		—		—		(628.8)

Balance at December 31, 2024	$	63.9	$	2,619.6	$	24,335.6	$	(20,412.3)	$	(1,528.7)	$	5,078.1


	Three Months Ended
	December 31, 2023
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at September 30, 2023	$	63.9	$	2,188.7	$	22,455.4	$	(18,767.4)	$	(2,467.8)	$	3,472.8
Net earnings	—		—		878.4		—		—		878.4
Other comprehensive income	—		—		—		—		722.6		722.6
Stock-based compensation expense	—		67.6		—		—		—		67.6
Issuances relating to stock compensation plans	—		6.6		—		0.3		—		6.9
Treasury stock acquired (1.1 million shares repurchased)	—		—		—		(252.0)		—		(252.0)
Dividends declared ($1.40 per share)	—		—		(576.7)		—		—		(576.7)

Balance at December 31, 2023	$	63.9	$	2,262.9	$	22,757.1	$	(19,019.1)	$	(1,745.2)	$	4,319.6


	Six Months Ended
	December 31, 2024
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at June 30, 2024	$	63.9	$	2,406.9	$	23,622.2	$	(19,737.1)	$	(1,808.3)	$	4,547.6
Net earnings	—		—		1,919.5		—		—		1,919.5
Other comprehensive income	—		—		—		—		279.6		279.6
Stock-based compensation expense	—		125.0		—		—		—		125.0
Issuances relating to stock compensation plans	—		87.7		—		56.2		—		143.9
Treasury stock acquired (2.4 million shares repurchased)	—		—		—		(731.4)		—		(731.4)
Dividends declared ($2.94 per share)	—		—		(1,206.1)		—		—		(1,206.1)

Balance at December 31, 2024	$	63.9	$	2,619.6	$	24,335.6	$	(20,412.3)	$	(1,528.7)	$	5,078.1


	Six Months Ended
	December 31, 2023
	Common Stock		Capital in Excess of Par Value		Retained Earnings		Treasury Stock		AOCI		Total
Balance at June 30, 2023	$	63.9	$	2,102.3	$	22,118.0	$	(18,469.3)	$	(2,305.8)	$	3,509.1
Net earnings	—		—		1,737.8		—		—		1,737.8
Other comprehensive income	—		—		—		—		560.6		560.6
Stock-based compensation expense	—		121.7		—		—		—		121.7
Issuances relating to stock compensation plans	—		38.9		—		49.7		—		88.6
Treasury stock acquired (2.1 million shares repurchased)	—		—		—		(599.5)		—		(599.5)
Dividends declared ($2.65 per share)	—		—		(1,098.7)		—		—		(1,098.7)

Balance at December 31, 2023	$	63.9	$	2,262.9	$	22,757.1	$	(19,019.1)	$	(1,745.2)	$	4,319.6

Reclassifications out of Accumulated Other Comprehensive Income (“AOCI”) (Tables)

6 Months Ended

Dec. 31, 2024

Schedule of Reclassification out of Accumulated Other Comprehensive Income

Changes in AOCI by component are as follows:


	Three Months Ended
	December 31, 2024
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at September 30, 2024	$	(329.6)	$	(511.3)		$	(28.6)		$	(230.7)		$	(1,100.2)
Other comprehensive income/(loss) before reclassification adjustments	(101.0)		(423.8)			—			—			(524.8)
Tax effect	—		94.2			—			—			94.2
Reclassification adjustments to net earnings	—		0.6		(A)	1.4		(C)	0.7		(B)	2.7
Tax effect	—		(0.1)			(0.3)			(0.2)			(0.6)

Balance at December 31, 2024	$	(430.6)	$	(840.4)		$	(27.5)		$	(230.2)		$	(1,528.7)


	Three Months Ended
	December 31, 2023
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at September 30, 2023	$	(385.4)	$	(1,824.6)		$	(22.5)		$	(235.3)		$	(2,467.8)
Other comprehensive income/(loss) before reclassification adjustments	53.9		860.5			—			—			914.4
Tax effect	—		(194.9)			—			—			(194.9)
Reclassification adjustments to net earnings	—		2.0		(A)	1.1		(C)	0.9		(B)	4.0
Tax effect	—		(0.5)			(0.2)			(0.2)			(0.9)

Balance at December 31, 2023	$	(331.5)	$	(1,157.5)		$	(21.6)		$	(234.6)		$	(1,745.2)


	Six Months Ended
	December 31, 2024
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at June 30, 2024	$	(378.8)	$	(1,178.0)		$	(20.0)		$	(231.5)		$	(1,808.3)
Other comprehensive income/(loss) before reclassification adjustments	(51.8)		440.5			(12.5)			—			376.2
Tax effect	—		(103.6)			3.1			—			(100.5)
Reclassification adjustments to net earnings	—		0.8		(A)	2.5		(C)	1.8		(B)	5.1
Tax effect	—		(0.1)			(0.6)			(0.5)			(1.2)

Balance at December 31, 2024	$	(430.6)	$	(840.4)		$	(27.5)		$	(230.2)		$	(1,528.7)


	Six Months Ended
	December 31, 2023
	Currency Translation Adjustment		Net Gains/Losses on Available-for-sale Securities			Cash Flow Hedging Activities			Pension Liability			Accumulated Other Comprehensive (Loss) /Income
Balance at June 30, 2023	$	(340.8)	$	(1,705.6)		$	(23.3)		$	(236.1)		$	(2,305.8)
Other comprehensive income/(loss) before reclassification adjustments	9.3		709.9			—			—			719.2
Tax effect	—		(164.8)			—			—			(164.8)
Reclassification adjustments to net earnings	—		4.0		(A)	2.2		(C)	1.9		(B)	8.1
Tax effect	—		(1.0)			(0.5)			(0.4)			(1.9)

Balance at December 31, 2023	$	(331.5)	$	(1,157.5)		$	(21.6)		$	(234.6)		$	(1,745.2)

(A) Reclassification adjustments out of AOCI are included within Other (income)/expense, net, on the Statements of Consolidated Earnings.

(B) Reclassification adjustments out of AOCI are included in net pension (income)/expense (see Note 12).

(C) Reclassification adjustments out of AOCI are included in Interest expense on the Statements of Consolidated Earnings (see Note 11).

Interim Financial Data by Segment (Tables)

6 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Segment Results:


	Revenues
	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Employer Services	$	3,388.5	$	3,125.2	$	6,649.5	$	6,171.6
PEO Services	1,663.3		1,546.1		3,237.8		3,015.7
Other	(3.4)		(3.3)		(6.2)		(7.0)
	$	5,048.4	$	4,668.0	$	9,881.1	$	9,180.3


	Earnings before Income Taxes
	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2024		2023		2024		2023
Employer Services	$	1,183.0	$	1,061.9	$	2,347.3	$	2,070.4
PEO Services	251.7		255.0		477.3		477.9
Other	(173.4)		(173.1)		(327.1)		(311.7)
	$	1,261.3	$	1,143.8	$	2,497.5	$	2,236.6

Revenue - Narrative (Details)	Dec. 31, 2024 pillar
Revenue from Contract with Customer [Abstract]
Number of strategic pillars	3

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 5,048.4	$ 4,668.0	$ 9,881.1	$ 9,180.3
Other
Disaggregation of Revenue [Line Items]
Revenues	(3.4)	(3.3)	(6.2)	(7.0)
Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	3,388.5	3,125.2	6,649.5	6,171.6
PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	1,663.3	1,546.1	3,237.8	3,015.7
Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	(3.4)	(3.3)	(6.2)	(7.0)
HCM
Disaggregation of Revenue [Line Items]
Revenues	2,131.9	1,975.2	4,157.3	3,889.4
HCM \| Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	2,134.4	1,977.4	4,162.0	3,894.0
HCM \| PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0	0.0
HCM \| Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	(2.5)	(2.2)	(4.7)	(4.6)
HRO, excluding PEO zero-margin benefits pass-throughs
Disaggregation of Revenue [Line Items]
Revenues	943.2	888.7	1,808.4	1,700.4
HRO, excluding PEO zero-margin benefits pass-throughs \| Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	338.5	316.4	681.3	638.5
HRO, excluding PEO zero-margin benefits pass-throughs \| PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	605.6	573.4	1,128.6	1,064.3
HRO, excluding PEO zero-margin benefits pass-throughs \| Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	(0.9)	(1.1)	(1.5)	(2.4)
PEO zero-margin benefits pass-throughs
Disaggregation of Revenue [Line Items]
Revenues	1,055.2	970.7	2,104.4	1,947.5
PEO zero-margin benefits pass-throughs \| Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0	0.0
PEO zero-margin benefits pass-throughs \| PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	1,055.2	970.7	2,104.4	1,947.5
PEO zero-margin benefits pass-throughs \| Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0	0.0
Global
Disaggregation of Revenue [Line Items]
Revenues	645.3	608.1	1,284.9	1,215.9
Global \| Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	645.3	608.1	1,284.9	1,215.9
Global \| PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0	0.0
Global \| Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	0.0	0.0	0.0	0.0
Interest on funds held for clients
Disaggregation of Revenue [Line Items]
Revenues	272.8	225.3	526.1	427.1
Interest on funds held for clients \| Employer Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	270.3	223.3	521.3	423.2
Interest on funds held for clients \| PEO Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	2.5	2.0	4.8	3.9
Interest on funds held for clients \| Other \| Other
Disaggregation of Revenue [Line Items]
Revenues	$ 0.0	$ 0.0	$ 0.0	$ 0.0

Revenue - Contract Liability (Details) $ in Millions	6 Months Ended
Revenue - Contract Liability (Details) $ in Millions	Dec. 31, 2024 USD ($)
Contract Liability
Contract liability, July 1, 2024	$ 491.6
Recognition of revenue included in beginning of year contract liability	(69.9)
Contract liability, net of revenue recognized on contracts during the period	60.9
Currency translation adjustments	(10.8)
Contract liability, December 31, 2024	$ 471.8

Acquisition - Schedule of Estimated Purchase Price, Net of Cash Acquired (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Oct. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Cash paid for acquisition of business, net of cash acquired		$ 1,160.6	$ 33.6
WorkForce Software
Business Acquisition [Line Items]
Purchase price	$ 1,173.1
Less: cash acquired	(12.5)
Cash paid for acquisition of business, net of cash acquired	$ 1,160.6

Acquisition - Schedule of Preliminary Purchase Price Allocation (Details) - USD ($) $ in Millions	Dec. 31, 2024	Oct. 31, 2024	Jun. 30, 2024
Business Acquisition [Line Items]
Goodwill	$ 3,183.9		$ 2,353.6
WorkForce Software
Business Acquisition [Line Items]
Cash		$ 12.5
Accounts receivable, net of allowance for doubtful accounts		20.0
Identifiable intangible assets		417.0
Goodwill		846.4
All other assets		21.9
Total assets acquired		1,317.8
Deferred revenue		39.6
Deferred income taxes		46.6
All other liabilities		58.5
Total liabilities assumed		144.7
Total net assets acquired		$ 1,173.1

Acquisition - Schedule of Estimated Fair Value of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Oct. 31, 2024
Business Acquisition [Line Items]
Estimated Useful Life (in years)	6 years
WorkForce Software
Business Acquisition [Line Items]
Estimated Fair Value		$ 417.0
Technology \| WorkForce Software
Business Acquisition [Line Items]
Estimated Fair Value		$ 200.0
Estimated Useful Life (in years)		7 years
Customer/Partner relationships \| WorkForce Software
Business Acquisition [Line Items]
Estimated Fair Value		$ 210.0
Estimated Useful Life (in years)		8 years
Tradename \| WorkForce Software
Business Acquisition [Line Items]
Estimated Fair Value		$ 7.0
Estimated Useful Life (in years)		4 years

Acquisition - Narrative (Details)	Oct. 31, 2024 USD ($)
WorkForce Software
Business Acquisition [Line Items]
Expected tax deductible amount	$ 0

Earnings per Share (“EPS”) - Schedule of Earnings per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net earnings	$ 963.2	$ 878.4	$ 1,919.5	$ 1,737.8
Basic, Weighted average shares (in shares)	407.6	411.1	407.7	411.4
Effect of Employee Stock Option Shares (in shares)	0.6	0.8	0.7	0.9
Effect of Employee Restricted Stock Shares (in shares)	0.8	0.6	0.9	1.7
Diluted, Weighted average shares (in shares)	409.0	412.5	409.3	414.0
Basic, EPS (in USD per share)	$ 2.36	$ 2.14	$ 4.71	$ 4.22
Diluted, EPS (in USD per share)	$ 2.35	$ 2.13	$ 4.69	$ 4.20

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 52
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-52

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-15

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-7

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-10

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-7

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 52
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-52

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-15

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-7

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-7

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 60
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 323
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482765/220-10-50-6

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480175/815-40-65-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-8

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-11

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 17: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479168/946-830-55-10

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-7

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 23: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1A

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480097/470-10-S99-1B

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483499/205-20-50-7

Reference 34: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1A

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482790/220-10-45-1B

Reference 37: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Debt Securities, Available-for-sale [Line Items]

Earnings per Share (“EPS”) - Narrative (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Options excluded from the calculation of diluted earnings per share (in shares)	0.0	0.1	0.0	0.0

Other (Income)/Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Other Income and Expenses [Abstract]
Interest income on corporate funds	$ (83.9)	$ (56.9)	$ (175.5)	$ (103.4)
Realized losses on available-for-sale securities, net	0.6	2.0	0.8	4.0
Gain on sale of assets	0.0	(1.4)	(2.4)	(16.0)
Non-service components of pension income, net	(7.8)	(8.5)	(15.7)	(17.1)
Other (income)/expense, net	$ (91.1)	$ (64.8)	$ (192.8)	$ (132.5)

Corporate Investments and Funds Held for Clients - Corporate Investments and Funds Held for Clients (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Money market securities, cash and other cash equivalents - amortized cost	$ 2,216.4	$ 2,913.4	$ 1,641.3
Amortized Cost	34,094.4	32,723.3
Gross unrealized gains	66.1	30.9
Gross unrealized losses	(1,140.6)	(1,546.7)
Fair market value	33,019.9	31,207.5
Total corporate investments and funds held for clients - amortized cost	50,698.6	42,809.3
Total corporate investments and funds held for clients - gross unrealized gains	66.1	30.9
Total corporate investments and funds held for clients - gross unrealized losses	(1,140.6)	(1,546.7)
Total corporate investments and funds held for clients - fair market value	49,624.1	41,293.5
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,699.9	16,833.3
Gross unrealized gains	17.1	11.5
Gross unrealized losses	(708.7)	(944.8)
Fair market value	17,008.3	15,900.0
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	8,167.5	7,701.2
Gross unrealized gains	17.7	9.0
Gross unrealized losses	(99.0)	(164.5)
Fair market value	8,086.2	7,545.7
Canadian government obligations and Canadian government agency obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,183.3	2,130.7
Gross unrealized gains	12.3	1.7
Gross unrealized losses	(51.7)	(86.6)
Fair market value	2,143.9	2,045.8
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,602.7	1,645.0
Gross unrealized gains	0.2	0.5
Gross unrealized losses	(118.1)	(140.6)
Fair market value	1,484.8	1,504.9
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,600.5	1,394.9
Gross unrealized gains	8.3	3.9
Gross unrealized losses	(28.3)	(43.0)
Fair market value	1,580.5	1,355.8
Canadian provincial bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,108.5	1,116.3
Gross unrealized gains	8.4	2.3
Gross unrealized losses	(42.6)	(56.2)
Fair market value	1,074.3	1,062.4
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	481.4	535.9
Gross unrealized gains	0.0	0.0
Gross unrealized losses	(28.4)	(35.1)
Fair market value	453.0	500.8
Other securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,250.6	1,366.0
Gross unrealized gains	2.1	2.0
Gross unrealized losses	(63.8)	(75.9)
Fair market value	1,188.9	1,292.1
Funds Held For Clients
Debt Securities, Available-for-sale [Line Items]
Fair market value	33,019.9	30,823.5
Corporate Investments
Debt Securities, Available-for-sale [Line Items]
Fair market value	0.0	384.0
Money market securities, cash and other cash equivalents
Debt Securities, Available-for-sale [Line Items]
Money market securities, cash and other cash equivalents - amortized cost	16,604.2	10,086.0
Money market securities and other cash equivalents - fair market value	$ 16,604.2	$ 10,086.0

Corporate Investments and Funds Held for Clients - Narrative (Details) - USD ($)	6 Months Ended
	Dec. 31, 2024	Jun. 30, 2024
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	$ 33,019,900,000	$ 31,207,500,000
Client fund obligation repayment period	1 year
Client funds obligations	$ 48,482,200,000	39,503,900,000
Client funds held in grantor trust	$ 43,112,400,000	34,940,000,000
Client funds investments with original maturities	90 days
Fair Value, Inputs, Level 1
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	$ 0
Fair Value, Inputs, Level 3
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	0
Asset-Backed Auto Loan Receivables
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	751,900,000
Fixed Rate Credit Card
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	480,100,000
Asset-Backed Equipment Lease Receivable
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	167,500,000
Federal Farm Credit Banks
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	960,200,000
Federal Home Loan Banks
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	480,000,000.0
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	453,000,000.0	$ 500,800,000
Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	523,700,000
Debt Security, Corporate, Non-US
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	293,900,000
Supranational Bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale	$ 213,000,000.0

Corporate Investments and Funds Held for Clients - Available-For-Sale Securities that Have Been in an Unrealized Loss Position (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	$ (85.9)	$ (66.8)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	7,236.0	5,560.0
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(1,054.7)	(1,479.9)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	19,578.3	22,249.9
Total, Gross Unrealized Losses	(1,140.6)	(1,546.7)
Total, Fair Market Value	26,814.3	27,809.9
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(51.8)	(25.8)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	3,389.6	2,173.6
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(656.9)	(919.0)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	11,809.9	12,413.4
Total, Gross Unrealized Losses	(708.7)	(944.8)
Total, Fair Market Value	15,199.5	14,587.0
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(20.3)	(23.1)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	2,677.3	2,186.2
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(78.7)	(141.4)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	2,754.4	4,076.9
Total, Gross Unrealized Losses	(99.0)	(164.5)
Total, Fair Market Value	5,431.7	6,263.1
Canadian government obligations and Canadian government agency obligations
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(0.7)	(0.9)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	266.8	304.6
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(51.0)	(85.7)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	1,311.2	1,591.6
Total, Gross Unrealized Losses	(51.7)	(86.6)
Total, Fair Market Value	1,578.0	1,896.2
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(1.9)	(0.7)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	113.0	51.5
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(116.2)	(139.9)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	1,346.8	1,428.2
Total, Gross Unrealized Losses	(118.1)	(140.6)
Total, Fair Market Value	1,459.8	1,479.7
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(3.0)	(2.3)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	271.4	351.4
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(25.3)	(40.7)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	601.4	668.0
Total, Gross Unrealized Losses	(28.3)	(43.0)
Total, Fair Market Value	872.8	1,019.4
Canadian provincial bonds
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(3.9)	(1.3)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	166.5	193.0
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(38.7)	(54.9)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	612.7	717.4
Total, Gross Unrealized Losses	(42.6)	(56.2)
Total, Fair Market Value	779.2	910.4
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(0.4)	(0.5)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	25.5	11.2
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(28.0)	(34.6)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	427.6	489.6
Total, Gross Unrealized Losses	(28.4)	(35.1)
Total, Fair Market Value	453.1	500.8
Other securities
Debt Securities, Available-for-sale [Line Items]
Securities in Unrealized Loss Position Less Than 12 Months, Gross Unrealized Losses	(3.9)	(12.2)
Securities in Unrealized Loss Position Less Than 12 Months, Fair Market Value	325.9	288.5
Securities in Unrealized Loss Position Greater Than 12 Months, Gross Unrealized Losses	(59.9)	(63.7)
Securities in Unrealized Loss Position Greater Than 12 Months, Fair Market Value	714.3	864.8
Total, Gross Unrealized Losses	(63.8)	(75.9)
Total, Fair Market Value	$ 1,040.2	$ 1,153.3

Corporate Investments and Funds Held for Clients - Classification of Corporate Investments on the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Cash and cash equivalents	$ 2,216.4	$ 2,913.4	$ 1,641.3
Short-term marketable securities	0.0	384.0
Long-term marketable securities	0.0	0.0
Total corporate investments	$ 2,216.4	$ 3,297.4

Corporate Investments and Funds Held for Clients - Schedule of Investment of Funds Held for Clients (Details) - USD ($)
$ in Millions

Dec. 31, 2024

Jun. 30, 2024

Dec. 31, 2023

^[1]

Restricted cash and cash equivalents held to satisfy client funds obligations

$ 14,387.8

^[1]

$ 7,172.6

$ 12,238.0

Total funds held for clients

47,407.7

37,996.1

Current

Debt Securities, Available-for-sale [Line Items]

Restricted short-term and long term marketable securities held to satisfy client funds obligations

6,807.9

5,538.1

Non-current

Debt Securities, Available-for-sale [Line Items]

Restricted short-term and long term marketable securities held to satisfy client funds obligations

$ 26,212.0

$ 25,285.4

[1]	See Note 7 for a reconciliation of restricted cash and restricted cash equivalents in funds held for clients on the Consolidated Balance Sheets.

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Corporate Investments and Funds Held for Clients - Expected Maturities of Available-For-Sale Securities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract]
One year or less	$ 6,807.9
One year to two years	7,555.4
Two years to three years	4,061.8
Three years to four years	5,502.4
After four years	9,092.4
Total available-for-sale securities	$ 33,019.9	$ 31,207.5

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 103
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-103

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481830/320-10-45-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

Leases - Narrative (Details)	Dec. 31, 2024	Jun. 30, 2024
Leases [Abstract]
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Remaining lease term	11 years

Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease cost	$ 27.3	$ 32.2	$ 54.8	$ 66.2
Short-term lease cost	0.2	0.4	0.5	0.9
Variable lease cost	4.6	4.8	11.2	8.0
Total operating lease cost	$ 32.1	$ 37.4	$ 66.5	$ 75.1

Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Leases [Abstract]
Cash paid for operating lease liabilities	$ 59.3	$ 63.6
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 31.7	$ 45.8
Weighted-average remaining lease term (in years)	5 years		5 years
Weighted-average discount rate	3.40%		3.30%
Current operating lease liability	$ 94.6		$ 92.2

Leases - Operating Lease Maturities (Details) $ in Millions	Dec. 31, 2024 USD ($)
Leases [Abstract]
Six months ending June 30, 2025	$ 55.2
Twelve months ending June 30, 2026	100.1
Twelve months ending June 30, 2027	87.1
Twelve months ending June 30, 2028	66.6
Twelve months ending June 30, 2029	44.4
Thereafter	77.7
Total undiscounted lease obligations	431.1
Less: Imputed interest	(36.2)
Net lease obligations	$ 394.9

Goodwill and Intangible Assets, net - Changes in Goodwill (Details) $ in Millions	6 Months Ended
	Dec. 31, 2024 USD ($)
Goodwill [Roll Forward]
Balance at June 30, 2024	$ 2,353.6
Additions and other adjustments	846.4
Currency translation adjustments	(16.1)
Balance at December 31, 2024	3,183.9
Employer Services
Goodwill [Roll Forward]
Balance at June 30, 2024	2,348.8
Additions and other adjustments	846.4
Currency translation adjustments	(16.1)
Balance at December 31, 2024	3,179.1
PEO Services
Goodwill [Roll Forward]
Balance at June 30, 2024	4.8
Additions and other adjustments	0.0
Currency translation adjustments	0.0
Balance at December 31, 2024	$ 4.8

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 49
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-49

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 24
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482548/350-20-55-24

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481372/852-10-55-10

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(15))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482598/350-20-45-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Goodwill and Intangible Assets, net - Components of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,767.9	$ 5,227.3
Intangible assets, accumulated amortization	(4,028.8)	(3,891.3)
Intangible assets, net	1,739.1	1,336.0
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	4,098.6	3,803.7
Intangible assets, accumulated amortization	(2,743.5)	(2,642.6)
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,420.0	1,181.6
Intangible assets, accumulated amortization	(1,042.9)	(1,007.6)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	249.3	242.0
Intangible assets, accumulated amortization	$ (242.4)	$ (241.1)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Goodwill and Intangible Assets, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	6 years		6 years
Amortization of intangible assets	$ 100.7	$ 94.5	$ 189.7	$ 190.2
Software and software licenses
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	6 years		6 years
Customer contracts and lists
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	5 years		5 years
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	4 years		4 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Goodwill and Intangible Assets, net - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) $ in Millions	Dec. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Six months ending June 30, 2025	$ 253.2
Twelve months ending June 30, 2026	362.3
Twelve months ending June 30, 2027	262.5
Twelve months ending June 30, 2028	220.6
Twelve months ending June 30, 2029	190.1
Twelve months ending June 30, 2030	$ 148.8

Short-term Financing - Narrative (Details) - USD ($)

6 Months Ended

Dec. 31, 2024

Jun. 30, 2024

Line of credit facility, fair value of amount outstanding

$ 0

Commercial paper

$ 0

Maturities of short-term funding agreements (up to)

5 days

Obligations under reverse repurchase agreements

^[1]

$ 0

$ 385,400,000

Aggregate committed obligations under reverse repurchase agreements

7,300,000,000

364-day credit agreement

Credit Facility Expiring In June 2028

$ 4,550,000,000

Term of credit

364 days

Extension option term

1 year

Line of credit facility potentially available increase in maximum borrowing capacity

$ 2,250,000,000

Term of credit

5 years

$ 500,000,000

Credit Facility Expiring In June 2029

Line of credit facility potentially available increase in maximum borrowing capacity

$ 3,500,000,000

Term of credit

5 years

$ 500,000,000

Commercial paper program

Debt instrument, maturity period

$ 10,300,000,000

364 days

[1]	As of June 30, 2024, $384.0 million of short-term marketable securities and $1.4 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).

Short-term Financing - Commercial Paper Program and Reverse Repurchase Agreements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Commercial paper program
Short-term Debt [Line Items]
Average outstanding balances (in billions)	$ 4,500.0	$ 3,900.0	$ 4,700.0	$ 4,000.0
Weighted average interest rates	4.80%	5.40%	5.10%	5.30%
Weighted average maturity (approximately in days)	2 days	2 days	2 days	2 days
Reverse repurchase agreements
Short-term Debt [Line Items]
Average outstanding balances (in billions)	$ 3,700.0	$ 2,400.0	$ 3,700.0	$ 1,900.0
Weighted average interest rates	4.80%	5.40%	5.00%	5.40%

Debt - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended
Debt - Narrative (Details) $ in Millions	Dec. 31, 2024 USD ($) note	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) note	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Number of fixed rate notes issued \| note	4			4
Debt face amount	$ 4,000.0			$ 4,000.0
Notional amount of derivatives terminated		$ 1,000.0
Unamortized loss on cash flow hedges	0.0	12.5	$ 0.0	12.5	$ 0.0
Fair value of notes issued	$ 3,688.6			$ 3,688.6
Derivative Instrument, Termination One
Debt Instrument [Line Items]
Notional amount of derivatives terminated		400.0
Derivative Instrument, Termination Two
Debt Instrument [Line Items]
Notional amount of derivatives terminated		600.0
Fixed-rate 4.450% notes due September 9, 2034 \| Senior Notes
Debt Instrument [Line Items]
Debt face amount		$ 1,000.0
Stated interest rate	4.45%	4.45%		4.45%
Minimum
Debt Instrument [Line Items]
Debt instrument, term				7 years
Maximum
Debt Instrument [Line Items]
Debt instrument, term				10 years

Debt - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024
Debt Instrument [Line Items]
Notes payable	$ 4,003.5		$ 3,004.1
Less: current portion	(1,000.5)		(1.1)
Less: unamortized discount and debt issuance costs	(21.0)		(11.7)
Long-term debt	$ 2,982.0		2,991.3
Fixed-rate 3.375% notes due September 15, 2025
Debt Instrument [Line Items]
Stated interest rate	3.375%
Debt instrument effective rate (in percent)	3.47%
Notes payable	$ 1,000.0		1,000.0
Fixed-rate 1.700% notes due May 15, 2028
Debt Instrument [Line Items]
Stated interest rate	1.70%
Debt instrument effective rate (in percent)	1.85%
Notes payable	$ 1,000.0		1,000.0
Fixed-rate 1.250% notes due September 1, 2030
Debt Instrument [Line Items]
Stated interest rate	1.25%
Debt instrument effective rate (in percent)	1.83%
Notes payable	$ 1,000.0		1,000.0
Fixed-rate 4.450% notes due September 9, 2034 \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate	4.45%	4.45%
Debt instrument effective rate (in percent)	4.75%
Notes payable	$ 1,000.0		0.0
Other
Debt Instrument [Line Items]
Notes payable	$ 3.5		$ 4.1

Employee Benefit Plans - Narrative (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Retirement Benefits [Abstract]
Treasury stock acquired (in shares)	0.9	1.1	2.4	2.1

Employee Benefit Plans - Components of Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 79.1	$ 73.6	$ 139.7	$ 132.4
Operating expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	9.2	7.4	18.3	14.8
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	59.6	57.6	101.9	100.4
Research and development
Defined Benefit Plan Disclosure [Line Items]
Total pretax stock-based compensation expense	$ 10.3	$ 8.6	$ 19.5	$ 17.2

Employee Benefit Plans - Components of Net Pension (Income)/Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Retirement Benefits [Abstract]
Service cost – benefits earned during the period	$ 1.5	$ 1.3	$ 3.0	$ 2.6
Interest cost on projected benefits	21.9	21.1	43.7	42.3
Expected return on plan assets	(29.0)	(29.0)	(58.0)	(58.0)
Net amortization and deferral	0.7	0.8	1.5	1.5
Net pension income	$ (4.9)	$ (5.8)	$ (9.8)	$ (11.6)

Income Taxes (Details)	3 Months Ended		6 Months Ended
Income Taxes (Details)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Effective income tax rate	23.60%	23.20%	23.10%	22.30%

Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Treasury stock acquired (in shares)	0.9	1.1	2.4	2.1
Dividends declared (in USD per share)	$ 1.54	$ 1.40	$ 2.94	$ 2.65
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,348.6	$ 3,472.8	$ 4,547.6	$ 3,509.1
Net earnings	963.2	878.4	1,919.5	1,737.8
Other comprehensive income	(428.5)	722.6	279.6	560.6
Stock-based compensation expense	70.2	67.6	125.0	121.7
Issuances relating to stock compensation plans	27.3	6.9	143.9	88.6
Treasury stock acquired	(273.9)	(252.0)	(731.4)	(599.5)
Dividends declared	(628.8)	(576.7)	(1,206.1)	(1,098.7)
Ending balance	5,078.1	4,319.6	5,078.1	4,319.6
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	63.9	63.9	63.9	63.9
Ending balance	63.9	63.9	63.9	63.9
Capital in Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2,528.6	2,188.7	2,406.9	2,102.3
Stock-based compensation expense	70.2	67.6	125.0	121.7
Issuances relating to stock compensation plans	20.8	6.6	87.7	38.9
Ending balance	2,619.6	2,262.9	2,619.6	2,262.9
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	24,001.2	22,455.4	23,622.2	22,118.0
Net earnings	963.2	878.4	1,919.5	1,737.8
Dividends declared	(628.8)	(576.7)	(1,206.1)	(1,098.7)
Ending balance	24,335.6	22,757.1	24,335.6	22,757.1
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(20,144.9)	(18,767.4)	(19,737.1)	(18,469.3)
Issuances relating to stock compensation plans	6.5	0.3	56.2	49.7
Treasury stock acquired	(273.9)	(252.0)	(731.4)	(599.5)
Ending balance	(20,412.3)	(19,019.1)	(20,412.3)	(19,019.1)
AOCI
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,100.2)	(2,467.8)	(1,808.3)	(2,305.8)
Other comprehensive income	(428.5)	722.6	279.6	560.6
Ending balance	$ (1,528.7)	$ (1,745.2)	$ (1,528.7)	$ (1,745.2)

Reclassifications out of Accumulated Other Comprehensive Income (“AOCI”) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 5,348.6	$ 3,472.8	$ 4,547.6	$ 3,509.1
Other comprehensive income/(loss) before reclassification adjustments	(524.8)	914.4	376.2	719.2
Tax effect	94.2	(194.9)	(100.5)	(164.8)
Reclassification adjustments to net earnings	2.7	4.0	5.1	8.1
Tax effect	(0.6)	(0.9)	(1.2)	(1.9)
Ending balance	5,078.1	4,319.6	5,078.1	4,319.6
Accumulated Other Comprehensive (Loss) /Income
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,100.2)	(2,467.8)	(1,808.3)	(2,305.8)
Ending balance	(1,528.7)	(1,745.2)	(1,528.7)	(1,745.2)
Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(329.6)	(385.4)	(378.8)	(340.8)
Other comprehensive income/(loss) before reclassification adjustments	(101.0)	53.9	(51.8)	9.3
Tax effect	0.0	0.0	0.0	0.0
Reclassification adjustments to net earnings	0.0	0.0	0.0	0.0
Tax effect	0.0	0.0	0.0	0.0
Ending balance	(430.6)	(331.5)	(430.6)	(331.5)
Net Gains/Losses on Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(511.3)	(1,824.6)	(1,178.0)	(1,705.6)
Other comprehensive income/(loss) before reclassification adjustments	(423.8)	860.5	440.5	709.9
Tax effect	94.2	(194.9)	(103.6)	(164.8)
Reclassification adjustments to net earnings	0.6	2.0	0.8	4.0
Tax effect	(0.1)	(0.5)	(0.1)	(1.0)
Ending balance	(840.4)	(1,157.5)	(840.4)	(1,157.5)
Cash Flow Hedging Activities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(28.6)	(22.5)	(20.0)	(23.3)
Other comprehensive income/(loss) before reclassification adjustments	0.0	0.0	(12.5)	0.0
Tax effect	0.0	0.0	3.1	0.0
Reclassification adjustments to net earnings	1.4	1.1	2.5	2.2
Tax effect	(0.3)	(0.2)	(0.6)	(0.5)
Ending balance	(27.5)	(21.6)	(27.5)	(21.6)
Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(230.7)	(235.3)	(231.5)	(236.1)
Other comprehensive income/(loss) before reclassification adjustments	0.0	0.0	0.0	0.0
Tax effect	0.0	0.0	0.0	0.0
Reclassification adjustments to net earnings	0.7	0.9	1.8	1.9
Tax effect	(0.2)	(0.2)	(0.5)	(0.4)
Ending balance	$ (230.2)	$ (234.6)	$ (230.2)	$ (234.6)

Interim Financial Data by Segment - Narrative (Details)	6 Months Ended
Interim Financial Data by Segment - Narrative (Details)	Dec. 31, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	2

Interim Financial Data by Segment - Financial Data By Strategic Business Unit Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 5,048.4	$ 4,668.0	$ 9,881.1	$ 9,180.3
Earnings before Income Taxes	1,261.3	1,143.8	2,497.5	2,236.6
Other
Segment Reporting Information [Line Items]
Revenues	(3.4)	(3.3)	(6.2)	(7.0)
Earnings before Income Taxes	(173.4)	(173.1)	(327.1)	(311.7)
Employer Services \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,388.5	3,125.2	6,649.5	6,171.6
Earnings before Income Taxes	1,183.0	1,061.9	2,347.3	2,070.4
PEO Services \| Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,663.3	1,546.1	3,237.8	3,015.7
Earnings before Income Taxes	$ 251.7	$ 255.0	$ 477.3	$ 477.9

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 7: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(11))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-1

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482964/270-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (ee)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-22

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-4