Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Securities and Shareholder Matters On March 6, 2023, a putative class action was filed in the United States District Court for the Middle District of Florida by a shareholder of the Company. The action was consolidated with another action and the consolidated case is now captioned In re Fidelity National Information Services, Inc. Securities Litigation. A lead plaintiff has been appointed, and a consolidated amended complaint was filed on August 2, 2023. The consolidated amended complaint names the Company and certain of its current and former officers as defendants and seeks damages for alleged violations of federal securities laws in connection with our disclosures relating to our former Merchant Solutions segment, including with respect to its valuation, integration, and synergies. On September 30, 2024, the court denied the defendants' motion to dismiss, and the case therefore has moved into the discovery phase. We intend to vigorously defend this case, but no assurance can be given as to the ultimate outcome. On April 27, 2023, a shareholder derivative action captioned Portia McCollum, derivatively on behalf of Fidelity National Information Services, Inc. v. Gary Norcross et al., was filed in the same court by a stockholder of the Company. Subsequently, that stockholder dismissed the suit without prejudice and sent a demand pursuant to Georgia Code § 14-2-742 (the "McCollum Demand"). Another stockholder, City of Hialeah Employees' Retirement System, sent a similar demand (the "Hialeah Demand"), and two other stockholders, City of Southfield Fire and Police Retirement System and Young Family Living Trust, also subsequently sent similar demands (the "Southfield Demand" and the "Young Demand"). The demands claim that FIS officers and directors violated federal securities laws and breached fiduciary duties, including with respect to the valuation, integration, and synergies of our former Merchant Solutions segment, and they demand that the Board investigate and commence legal proceedings against officers and directors in connection with the purported wrongdoing. On August 25, 2023, the Board established a Demand Review Committee to consider the McCollum and Hialeah Demands and any related demands that are received (such as the Southfield Demand and the Young Demand), and make recommendations to the Board with respect to the demands. The Demand Review Committee has hired independent counsel. The Board has made no final decision with respect to the demands and has not rejected the demands. On October 18, 2023, a shareholder derivative action captioned City of Hialeah Employees' Retirement System v. Stephanie L. Ferris et al. (the "Hialeah Action") was filed in the same court by the stockholder that previously had sent the Hialeah Demand. The complaint in the Hialeah Action, which names certain of the Company's current and former officers and directors as defendants (the "Individual Defendants"), seeks to assert claims on behalf of the Company for violations of federal securities laws, breach of fiduciary duty, unjust enrichment, and contribution and indemnification, including with respect to the valuation, integration, and synergies of our former Merchant Solutions segment. On March 29, 2024, the Company and the Individual Defendants filed a motion to stay or dismiss the action without prejudice pending the completion of the Board's consideration of the demands and the Individual Defendants concurrently filed a separate motion to dismiss. On October 22, 2024, another shareholder derivative action was filed in the same court by the stockholder who previously sent the McCollum Demand, captioned Portia McCollum, derivatively on behalf of Fidelity National Information Services, Inc. v. Gary Norcross et al. (the "McCollum Action"). The complaint in the McCollum Action, which names certain of the Company’s current and former officers and directors as defendants, seeks to assert claims on behalf of the Company for violations of federal securities laws, breach of fiduciary duty, aiding and abetting breach of fiduciary duty, waste, and unjust enrichment, including with respect to the valuation, integration, and synergies of our former Merchant Solutions segment. On November 7, 2024, the court entered an order staying the McCollum Action. January 15, 2025, Partial System Outage On January 15, 2025, a local area power disruption and coincident hardware failure resulted in a partial system outage that temporarily disrupted the operations of certain FIS clients. The outage was not the result of any cyber attack or other malicious conduct. FIS has restored impacted applications. In connection with this disruption, we have received a customer notice of its intent to seek indemnification relating to potential costs allegedly incurred as a result of this disruption, and a lawsuit was filed in state court in North Carolina by a purported class of customers of one of the affected banks. Although the Company is unable to estimate the impact of the incident, it does not believe that it will have a material impact on the Company or its financial condition or its results of operations. Indemnifications and Warranties The Company generally indemnifies its clients, subject to certain limitations and exceptions, against damages and costs resulting from claims of patent, copyright, or trademark infringement associated solely with its customers' use of the Company's solutions. Historically, the Company has not made any material payments under such indemnifications but continues to monitor the conditions that are subject to the indemnifications to identify whether it is probable that a loss has occurred, in which case it would recognize any such losses when they are estimable. In addition, the Company warrants to customers that its software operates substantially in accordance with the software specifications. Historically, no material costs have been incurred related to software warranties, and no accruals for warranty costs have been made. Purchase Commitments The Company has agreements with various vendors, generally with one- to five-year terms, principally for software, maintenance, and consulting and outsourced services, including cloud hosting and data centers. The Company's estimated aggregate contractual obligation remaining under these agreements is approximately $696 million as of December 31, 2024. However, this amount could be more or less depending on various factors such as the inflation rate, foreign exchange rates, the introduction of significant new technologies, or changes in the Company's processing needs. The foregoing amounts do not include obligations of the Company under operating leases.