Acquisitions	9 Months Ended
	Sep. 30, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions	AcquisitionsVirtus AcquisitionOn January 2, 2020, FIS acquired a majority interest in Virtus Partners ("Virtus"), previously a privately held company that provides high-value managed services and technology to the credit and loan market. The acquisition was accounted for as a business combination. FIS acquired a 70% voting and financial interest in Virtus with 30% interest retained by the founders of Virtus ("Founders"). The agreement between FIS and the Founders provided FIS with a call option to purchase, and the Founders with a put option requiring FIS to purchase, all of the Founders' retained interest in Virtus at a redemption value determined pursuant to performance goals stated in the agreement, exercisable at any time after two years and three years, respectively, following the acquisition date. In January 2023, the Founders exercised their put option, and as a result, FIS paid the $173 million redemption value, recorded as a financing activity in the consolidated statement of cash flows, and now owns 100% of Virtus.