Paychex, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Description of Business, Basis of Presentation, and Significant Accounting Policies (Policy)
Notes Tables
Notes Details

Funds Held for Clients and Corporate Investments (Narrative) (Details)

v3.25.2

Funds Held for Clients and Corporate Investments (Narrative) (Details) $ in Millions	12 Months Ended
	May 31, 2025 USD ($) Security	May 31, 2024 USD ($) Security
Schedule of Available-for-sale Securities [Line Items]
Net unrealized losses on available-for-sale securities	$ (53.6)	$ (162.5)
Number of available-for-sale securities in an unrealized loss position \| Security	600	957
Percentage of available-for-sale securities in an unrealized loss position	50.00%	95.00%
Gross unrealized losses on available-for-sale securities	$ 68.0	$ 164.2
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses on available-for-sale securities	$ 7.0	32.8
Corporate Bonds [Member] \| Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Jun. 01, 2025
Corporate Bonds [Member] \| Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	May 12, 2032
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses on available-for-sale securities	$ 44.3	$ 86.9
Municipal Bonds [Member] \| Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Jun. 01, 2025
Municipal Bonds [Member] \| Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Aug. 01, 2032
Variable Rate Demand Notes [Member] \| Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities contractual maturities	20 years
Variable Rate Demand Notes [Member] \| Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities contractual maturities	30 years

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