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Segment Information - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended		9 Months Ended
	Jun. 30, 2023 USD ($) country	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) country	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) country	Jul. 05, 2023
Segment Reporting Information
Goodwill impairment loss				$ 6,839
Asset impairments	$ 6,841		$ 29	6,841	$ 87
Subsequent Event | GTCR | Discontinued Operations | Worldpay Merchant Solutions
Segment Reporting Information
Percentage of equity stake							55.00%
Real-Estate Related Assets
Segment Reporting Information
Asset impairments					58
Non-Strategic Business
Segment Reporting Information
Asset impairments			29		29
Platform Modernization | Software and Deferred Contract Cost Assets
Segment Reporting Information
Incremental charges	$ 13		$ 42	$ 32	$ 94
Banking Solutions | Minimum
Segment Reporting Information
Number of countries we operate in (more than) | country	100			100		100
Merchant Solutions
Segment Reporting Information
Goodwill impairment loss	$ 6,800	$ 17,600		$ 6,800		$ 24,400
Merchant Solutions | Minimum
Segment Reporting Information
Number of countries we operate in (more than) | country	100			100		100
Capital Market Solutions | Minimum
Segment Reporting Information
Number of countries we operate in (more than) | country	100			100		100
Revenue | Revenue from Rights Concentration Risk | Minimum
Segment Reporting Information
Percentage of revenue	1.00%			1.00%

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