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

Quarterly report pursuant to Section 13 or 15(d)

Investment Income, Net (Details)

Investment Income, Net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Investment Income, Net [Abstract]
Interest income on corporate funds	$ 2.0us-gaap_InvestmentIncomeNonoperating	$ 1.9us-gaap_InvestmentIncomeNonoperating	$ 5.9us-gaap_InvestmentIncomeNonoperating	$ 5.2us-gaap_InvestmentIncomeNonoperating
Interest expense	(0.1)us-gaap_InterestExpenseOther	(0.2)us-gaap_InterestExpenseOther	(0.7)us-gaap_InterestExpenseOther	(1.0)us-gaap_InterestExpenseOther
Net loss from equity-method investments	(0.3)	(0.2)	(0.8)	(0.2)
Investment income, net	$ 1.6	$ 1.5	$ 4.4	$ 4.0

- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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