Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Noncontrolling Interests
Balance at beginning of period (in shares) at Dec. 31, 2017			791						376
Balance at beginning of period at Dec. 31, 2017	$ 2,731		$ 8	$ 1,031	$ (54)		$ 10,240		$ (8,494)	$ 0
Balance at beginning of period (Accounting Standards Update 2014-09) at Dec. 31, 2017		$ 208						$ 208
Balance at beginning of period (Accounting Standards Update 2017-12) at Dec. 31, 2017		0				$ 3		(3)
Balance at beginning of period (Accounting Standards Update 2018-02) at Dec. 31, 2017		0				$ (3)		3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,187						1,187
Other comprehensive (loss) income	(13)				(13)
Share-based compensation	73			73
Shares issued under stock plans (in shares)									(3)
Shares issued under stock plans	22			(47)					$ 69
Purchases of treasury stock (in shares)									26
Purchases of treasury stock	(1,915)								$ (1,915)
Balance at end of period (in shares) at Dec. 31, 2018			791						399
Balance at end of period at Dec. 31, 2018	2,293		$ 8	1,057	(67)		11,635		$ (10,340)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	897						893			4
Shares issued to acquire First Data (in shares)									(286)
Shares issued to acquire First Data (see Note 4)	31,791			22,582					$ 7,478	1,731
Distributions paid to noncontrolling interests	(111)									(111)
Other comprehensive (loss) income	(121)				(113)					(8)
Share-based compensation	229			229
Shares issued under stock plans (in shares)									(5)
Shares issued under stock plans	10			(127)					$ 137
Purchases of treasury stock (in shares)									4
Purchases of treasury stock	(393)								$ (393)
Balance at end of period (in shares) at Dec. 31, 2019			791						112
Balance at end of period at Dec. 31, 2019	$ 34,595	$ (45)	$ 8	23,741	(180)		12,528	$ (45)	$ (3,118)	1,616
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Net income	$ 936						958			(22)
Measurement period adjustments related to First Data acquisition (see Note 4)	(126)									(126)
Distributions paid to noncontrolling interests	(37)									(37)
Net adjustment to noncontrolling interests from dissolution (see Note 4)	(762)			(36)						(726)
Other comprehensive (loss) income	(172)				(207)					35	[1]
Share-based compensation	369			369
Shares issued under stock plans (in shares)									(5)
Shares issued under stock plans	(53)			(231)					$ 178
Purchases of treasury stock (in shares)									16
Purchases of treasury stock	(1,635)								$ (1,635)
Retirement of treasury stock (in shares)			(2)						(2)
Retirement of treasury stock (see Note 20)	0			(200)					$ 200
Balance at end of period (in shares) at Dec. 31, 2020			789						121
Balance at end of period at Dec. 31, 2020	$ 33,070		$ 8	$ 23,643	$ (387)		$ 13,441		$ (4,375)	$ 740

[1] The total net income presented in the consolidated statements of equity for the years ended December 31, 2020 and 2019 is different than the amount presented in the consolidated statements of income due to the net income attributable to redeemable noncontrolling interests of $39 million and $17 million, respectively, not included in equity.