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Segment Information (Narrative) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) country	Dec. 31, 2020 USD ($) country	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information
Number of countries in which entity operates (more than) | country	140	140
COVID-19 Pandemic
Segment Reporting Information
Incremental charges | $	$ 71
Worldpay
Segment Reporting Information
Data center consolidation costs | $		$ 88	$ 70
SunGard
Segment Reporting Information
Data center consolidation costs | $				$ 26
Foreign Entities
Segment Reporting Information
Long-term assets, excluding goodwill and other intangible assets | $	$ 1,772	$ 1,772	$ 1,646
Merchant Solutions
Segment Reporting Information
Number of countries in which entity operates (more than) | country	140	140
Banking Solutions
Segment Reporting Information
Number of countries in which entity operates (more than) | country	100	100
Capital Market Solutions
Segment Reporting Information
Number of countries in which entity operates (more than) | country	100	100

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- Definition

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- Definition

Long-term Assets, Excluding Goodwill and Other Intangible Assets.

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- Definition

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