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Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions			3 Months Ended
		Feb. 18, 2020	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue			$ 3,769	$ 1,502
Operating income (loss)			629	373
Corporate and Other
Segment Reporting Information [Line Items]
Revenue			264	126
Operating income (loss)			(457)	(104)
Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,401	0
Operating income (loss)			317	0
Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			718	725
Operating income (loss)			204	203
Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,386	651
Operating income (loss)			565	274
Processing and services revenue
Segment Reporting Information [Line Items]
Revenue	[1]		3,075	1,293
Processing and services revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue			28	49
Processing and services revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,190	0
Processing and services revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			673	672
Processing and services revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,184	572
Product revenue
Segment Reporting Information [Line Items]
Revenue			694	209
Product revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue			236	77
Product revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			211	0
Product revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			45	53
Product revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			$ 202	$ 79
Investment Services Business
Segment Reporting Information [Line Items]
Controlling interest sold (as a percent)		60.00%
[1] Includes processing and other fees charged to related party investments accounted for under the equity method of $57 million and $9 million for the three months ended March 31, 2020 and 2019, respectively (see Note 21).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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-Publisher FASB
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