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Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions			3 Months Ended
		Feb. 18, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenue			$ 3,755	$ 3,769
Operating income (loss)			475	629
Corporate and Other
Segment Reporting Information [Line Items]
Revenue			217	264
Operating income (loss)			(736)	(457)
Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,397	1,401
Operating income (loss)			387	317
Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			736	718
Operating income (loss)			246	204
Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,405	1,386
Operating income (loss)			578	565
Processing and services revenue
Segment Reporting Information [Line Items]
Revenue	[1]		3,054	3,075
Processing and services revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue			12	28
Processing and services revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,189	1,190
Processing and services revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			689	673
Processing and services revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			1,164	1,184
Product revenue
Segment Reporting Information [Line Items]
Revenue			701	694
Product revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue			205	236
Product revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue			208	211
Product revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue			47	45
Product revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue			$ 241	$ 202
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 $58 million and $57 million for the three months ended March 31, 2021 and 2020, respectively (see Note 19).

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