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Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue		$ 4,163	$ 3,786	$ 11,969	$ 11,020
Operating income (loss)		636	542	1,755	1,336
Corporate and Other
Segment Reporting Information [Line Items]
Revenue		215	218	642	690
Operating income (loss)		(834)	(745)	(2,352)	(2,082)
Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue		1,716	1,454	4,779	4,078
Operating income (loss)		552	423	1,463	985
Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue		761	727	2,251	2,159
Operating income (loss)		275	265	794	721
Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue		1,471	1,387	4,297	4,093
Operating income (loss)		643	599	1,850	1,712
Processing and services revenue
Segment Reporting Information [Line Items]
Revenue	[1]	3,407	3,153	9,822	9,118
Processing and services revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue		4	10	26	51
Processing and services revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue		1,458	1,256	4,079	3,495
Processing and services revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue		718	684	2,115	2,032
Processing and services revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue		1,227	1,203	3,602	3,540
Product revenue
Segment Reporting Information [Line Items]
Revenue		756	633	2,147	1,902
Product revenue | Corporate and Other
Segment Reporting Information [Line Items]
Revenue		211	208	616	639
Product revenue | Acceptance | Operating segments
Segment Reporting Information [Line Items]
Revenue		258	198	700	583
Product revenue | Fintech | Operating segments
Segment Reporting Information [Line Items]
Revenue		43	43	136	127
Product revenue | Payments | Operating segments
Segment Reporting Information [Line Items]
Revenue		$ 244	$ 184	$ 695	$ 553
[1] Includes processing and other fees charged to related party investments accounted for under the equity method of $46 million and $62 million for the three months ended September 30, 2021 and 2020, respectively, and $160 million and $174 million for the nine months ended September 30, 2021 and 2020, respectively (see Note 18).

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