Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited financial information included in this report includes the accounts of FIS and its subsidiaries prepared in accordance with U.S. generally accepted accounting principles and the instructions to Form 10-Q and Article 10 of Regulation S-X. All adjustments considered necessary for a fair presentation have been included. This report should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2022. The preparation of these consolidated financial statements in conformity with United States ("U.S.") generally accepted accounting principles ("GAAP") and the related rules and regulations of the U.S. Securities and Exchange Commission ("SEC" or "Commission") requires our management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. The inputs into management's critical and significant accounting estimates consider the economic impact of inflation and economic growth rates. These estimates may change as new events occur and additional information is obtained. Future actual results could differ materially from these estimates. To the extent that there are differences between these estimates, judgments and assumptions and actual results, our consolidated financial statements will be affected. On July 5, 2023, FIS signed a definitive agreement to sell a 55% equity interest in its Worldpay Merchant Solutions business to private equity funds managed by GTCR, LLC ("GTCR"). FIS will retain a non-controlling 45% ownership interest in a new standalone joint venture. The transaction is expected to close in the first quarter of 2024, subject to regulatory approvals and other customary closing conditions. Following the closing of this transaction, FIS' ownership interest in Worldpay Merchant Solutions business is expected to be reported as equity method investment earnings. In accordance with ASC 205-20, the Company analyzed quantitative and qualitative factors relevant to the Worldpay Merchant Solutions disposal group and determined that the accounting criteria to be classified as held for sale were met during the third quarter of fiscal year 2023 when the definitive agreement was signed. Accordingly, the assets and liabilities of the disposal group are presented separately on the consolidated balance sheets for all periods presented. In addition, the planned disposition represents a strategic shift that will have a major impact on the Company's operations and financial results. As a result, the operating results of the Worldpay Merchant Solutions business have been reflected as discontinued operations for all periods presented and as such, have been excluded from continuing operations and segment results. The Company's cash flows are presented inclusive of discontinued operations on the consolidated statement of cash flows for all periods presented. Total cash flows from operating, investing and financing activities for discontinued operations are presented in Note 2. The Worldpay Merchant Solutions business includes the former Merchant Solutions segment in addition to an insignificant non-strategic business previously included in the Corporate and Other segment, which have been recast as discontinued operations for all periods presented. Accordingly, the Company no longer reports the Merchant Solutions Segment; it now reports its financial performance based on the following segments: Banking Solutions, Capital Market Solutions and Corporate and Other. The Company regularly assesses its portfolio of assets and reclassified certain businesses from Capital Market Solutions to Banking Solutions and to the Corporate and Other segment in the quarter ended March 31, 2023, and recast all prior-period segment information presented. See Note 11 for more information regarding our segments and the related reclassification. Certain reclassifications have been made in the 2022 consolidated financial statements to conform to the classifications used in 2023. On the consolidated statements of comprehensive earnings, we reclassified the Change in fair value of net investment hedges from Foreign currency translation adjustments into its own classification. On the consolidated statements of cash flows, we reclassified Settlement of net investment hedges cross-currency interest rate swaps from Other investing activities to its own classification and Payments on tax receivable agreement from Other financing activities into its own classification. Amounts in tables in the financial statements and accompanying footnotes may not sum or calculate due to rounding.