SEGMENT INFORMATION - Schedule of Segment Reporting Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Reporting Information [Line Items]
Revenues	$ 2,280,906	$ 2,137,437	$ 4,437,160	$ 4,127,444
Operating income (loss)	(529,858)	362,558	(153,911)	637,817
Depreciation and amortization	427,576	422,044	856,248	847,616
Impairment of goodwill	833,075	0	833,075	0
Loss on business dispositions	(152,211)	0	(152,211)	0
Invasion of Ukraine by Russia
Segment Reporting Information [Line Items]
Impairment charge	127,200		127,200
Merchant Solutions
Segment Reporting Information [Line Items]
Impairment of goodwill			0
Issuer Solutions
Segment Reporting Information [Line Items]
Impairment of goodwill			0
Business and Consumer Solutions
Segment Reporting Information [Line Items]
Impairment of goodwill	833,100		833,075
Operating segments | Merchant Solutions
Segment Reporting Information [Line Items]
Revenues	1,581,716	1,426,755	3,054,735	2,694,627
Operating income (loss)	535,359	437,293	979,889	777,283
Depreciation and amortization	248,891	248,503	498,852	499,099
Operating segments | Issuer Solutions
Segment Reporting Information [Line Items]
Revenues	534,471	505,932	1,045,972	1,006,183
Operating income (loss)	67,715	74,806	125,816	143,262
Depreciation and amortization	153,457	145,691	305,580	290,300
Operating segments | Business and Consumer Solutions
Segment Reporting Information [Line Items]
Revenues	187,632	227,355	383,404	470,941
Operating income (loss)	31,726	42,283	65,385	104,205
Depreciation and amortization	20,268	21,938	40,536	43,858
Intersegment eliminations
Segment Reporting Information [Line Items]
Revenues	(22,913)	(22,605)	(46,951)	(44,307)
Corporate
Segment Reporting Information [Line Items]
Operating income (loss)	(179,372)	(191,824)	(339,715)	(386,933)
Depreciation and amortization	4,960	5,912	11,280	14,359
Acquisition-related costs	$ 61,400	$ 76,800	$ 109,500	$ 167,000