Paychex, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 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

Description of Business, Basis of Presentation, and Significant Accounting Policies (Narrative) (Details)

v3.7.0.1

Description of Business, Basis of Presentation, and Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2017 USD ($)	Feb. 29, 2016 USD ($)	Feb. 28, 2017 USD ($) segment $ / shares	Feb. 29, 2016 USD ($)	May 31, 2016 USD ($)
Accounting Policies [Line Items]
State of incorporation			Delaware
Number of reportable segments \| segment			1
Allowance for doubtful accounts	$ 5.3		$ 5.3		$ 4.2
Accounts receivable, net of allowance for doubtful accounts	429.9		429.9		408.6
Maximum individual workers' compensation claims liability			1.3		1.3
Maximum individual health insurance claims liability			0.3		0.3
Stock-based compensation costs recognized	8.9	$ 8.6	26.5	$ 26.1
Excess tax benefit in income tax expense			$ 17.3
Diluted earnings per share increase \| $ / shares			$ 0.05
Trade Receivables [Member]
Accounting Policies [Line Items]
Accounts receivable, net of allowance for doubtful accounts	212.5		$ 212.5		221.6
Purchased Receivables [Member]
Accounting Policies [Line Items]
Accounts receivable, net of allowance for doubtful accounts	$ 217.4		$ 217.4		$ 187.0
Germany [Member] \| Total Revenue [Member] \| Geographic Concentration Risk [Member]
Accounting Policies [Line Items]
Percentage of total revenue less than one percent			1.00%	1.00%

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