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Commitments and Contingencies (Details Textual) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2014 | Aug. 31, 2014 | Nov. 30, 2014 | May 31, 2014
Commitments and Contingencies (Textual) |  |  |  |
Commitments to purchase capital assets | $ 14,100,000 us-gaap_ContractualObligation |  | $ 14,100,000 us-gaap_ContractualObligation | $ 16,000,000 us-gaap_ContractualObligation
Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding | 0 us-gaap_ShortTermBorrowings / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember |  | 0 us-gaap_ShortTermBorrowings / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember |
Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding | 0 us-gaap_ShortTermBorrowings / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 0 us-gaap_ShortTermBorrowings / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Maximum amount outstanding during period | 150,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | 100,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Interest rate on amount borrowed |  |  | 3.25%us-gaap_LineOfCreditFacilityInterestRateDuringPeriod / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Maximum borrowing capacity | 750,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 750,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Expiration date |  |  | Jun. 21, 2018 |
Standby Letters of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount available | 43,000,000 payx_IrrevocableStandbyLettersOfCreditAmountAvailable / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember |  | 43,000,000 payx_IrrevocableStandbyLettersOfCreditAmountAvailable / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember | 43,000,000 payx_IrrevocableStandbyLettersOfCreditAmountAvailable / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember
Expiration date range of letters of credit |  |  | April 2015 and December 2015 |
Irrevocable stand by letters of credit amount outstanding | $ 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember |  | $ 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_CreditFacilityAxis = us-gaap_StandbyLettersOfCreditMember |

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- Definition Expiry date range of letters of credit. + References No definition available. + Details
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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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