Paychex, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

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)

v3.25.1

Funds Held for Clients and Corporate Investments (Narrative) (Details) $ in Millions	9 Months Ended	12 Months Ended
	Feb. 28, 2025 USD ($) Security	May 31, 2024 USD ($) Security
Schedule of Available-for-sale Securities [Line Items]
Net unrealized losses on available-for-sale securities	$ (67.9)	$ (162.5)
Number of available-for-sale securities in an unrealized loss position \| Security	658	957
Percentage of available-for-sale securities in an unrealized loss position	68.00%	95.00%
Gross unrealized losses on available-for-sale securities	$ 79.1	$ 164.2
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses on available-for-sale securities	$ 8.9	32.8
Corporate Bonds [Member] \| Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Mar. 06, 2025
Corporate Bonds [Member] \| Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Jul. 23, 2030
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses on available-for-sale securities	$ 50.7	$ 86.9
Municipal Bonds [Member] \| Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities maturity date	Mar. 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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