Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gpn_TotalSystemServicesInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelatedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ContractBasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksAndTradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gpn_SICOMSystemsInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gpn_AdvancedMDInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

ACQUISITIONS - Fair Value of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 18, 2019	Oct. 17, 2018	Sep. 04, 2018	Sep. 30, 2019
TSYS
Business Acquisition [Line Items]
Estimated Fair Values	$ 11,020,000			$ 11,020,000
Weighted-Average Estimated Amortization Periods	14 years
TSYS \| Customer-related intangible assets
Business Acquisition [Line Items]
Estimated Fair Values	$ 6,330,000
Weighted-Average Estimated Amortization Periods	18 years
TSYS \| Contract-based intangible assets
Business Acquisition [Line Items]
Estimated Fair Values	$ 1,810,000
Weighted-Average Estimated Amortization Periods	20 years
TSYS \| Acquired technologies
Business Acquisition [Line Items]
Estimated Fair Values	$ 1,810,000
Weighted-Average Estimated Amortization Periods	7 years
TSYS \| Trademarks and trade names
Business Acquisition [Line Items]
Estimated Fair Values	$ 1,070,000
Weighted-Average Estimated Amortization Periods	12 years
SICOM
Business Acquisition [Line Items]
Estimated Fair Values		$ 188,294		188,294
Weighted-Average Estimated Amortization Periods		10 years
SICOM \| Customer-related intangible assets
Business Acquisition [Line Items]
Estimated Fair Values		$ 104,900
Weighted-Average Estimated Amortization Periods		14 years
SICOM \| Contract-based intangible assets
Business Acquisition [Line Items]
Estimated Fair Values		$ 6,880
Weighted-Average Estimated Amortization Periods		5 years
SICOM \| Acquired technologies
Business Acquisition [Line Items]
Estimated Fair Values		$ 65,312
Weighted-Average Estimated Amortization Periods		6 years
SICOM \| Trademarks and trade names
Business Acquisition [Line Items]
Estimated Fair Values		$ 11,202
Weighted-Average Estimated Amortization Periods		3 years
AdvancedMD
Business Acquisition [Line Items]
Estimated Fair Values			$ 419,500	$ 419,500
Weighted-Average Estimated Amortization Periods			10 years
AdvancedMD \| Customer-related intangible assets
Business Acquisition [Line Items]
Estimated Fair Values			$ 303,100
Weighted-Average Estimated Amortization Periods			11 years
AdvancedMD \| Acquired technologies
Business Acquisition [Line Items]
Estimated Fair Values			$ 83,700
Weighted-Average Estimated Amortization Periods			5 years
AdvancedMD \| Trademarks and trade names
Business Acquisition [Line Items]
Estimated Fair Values			$ 32,700
Weighted-Average Estimated Amortization Periods			15 years