Long-Term Financing (Narrative) (Details) - USD ($) $ in Millions	May 31, 2021	May 31, 2020	Mar. 13, 2019
Aggregate principal amount	$ 800.0	$ 800.0
Company And Paychex Of New York [Member]
Aggregate principal amount			$ 800.0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant