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Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation FIS is a leading provider of technology solutions for merchants, banks and capital markets firms globally. On July 31, 2019, FIS completed the acquisition of Worldpay Inc. ("Worldpay"), and Worldpay's results of operations and financial position are included in the consolidated financial statements from and after the date of acquisition. See Note 3 for additional discussion. FIS reports its financial performance based on the following segments: Merchant Solutions, Banking Solutions, Capital Market Solutions, and Corporate and Other. The Company regularly assesses its portfolio of assets and reclassified certain non-strategic businesses from the Merchant Solutions, Banking Solutions, and Capital Market Solutions segments into the Corporate and Other segment during the year ended December 31, 2020, and recast all prior-period segment information presented. These operations represented approximately 3% of 2020 revenue. See Note 22 for a summary of each segment.