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ACQUISITIONS - Components of Consideration Transferred (Details) € in Millions, AUD in Millions									1 Months Ended	12 Months Ended
	Sep. 01, 2017 USD ($)	Apr. 22, 2016 USD ($)	Oct. 05, 2015 USD ($)	Oct. 05, 2015 EUR (€)	Mar. 25, 2015 USD ($)	Mar. 25, 2015 EUR (€)	Oct. 10, 2014 USD ($)	Oct. 10, 2014 AUD	May 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 21, 2016 USD ($)
Business Acquisition [Line Items]
Fair value of Global Payments common stock issued to Heartland stockholders												$ 0
ACTIVE Network
Business Acquisition [Line Items]
Cash consideration paid to Heartland stockholders	$ 599,497,000
Fair value of Global Payments common stock issued to Heartland stockholders	572,079,000
Total purchase consideration	$ 1,171,576,000									$ 1,171,576,000
Heartland Payment Systems, Inc
Business Acquisition [Line Items]
Cash consideration paid to Heartland stockholders		$ 2,043,362,000
Fair value of Global Payments common stock issued to Heartland stockholders		1,879,458,000
Total purchase consideration		$ 3,922,820,000							$ 37,500,000		$ 3,922,820,000
Ezidebit
Business Acquisition [Line Items]
Cash consideration paid to Heartland stockholders							$ 266,000,000	AUD 302.6
United States of America, Dollars | Realex Payments
Business Acquisition [Line Items]
Cash consideration paid to Heartland stockholders			$ 7,500,000		$ 118,900,000
Euro Member Countries, Euro | Realex Payments
Business Acquisition [Line Items]
Cash consideration paid to Heartland stockholders | €				€ 6.7		€ 110.2

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- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
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-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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