Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event As discussed in Note 1, on January 31, 2024, FIS completed the previously announced Worldpay Sale in a transaction valuing the Worldpay Merchant Solutions business at an enterprise value of $18.5 billion, including $1.0 billion of consideration contingent on the returns realized by Buyer exceeding certain thresholds. The net cash proceeds received by FIS at the closing were greater than $12 billion, net of estimated closing adjustments, debt restructuring fees, taxes and transaction costs. The closing adjustments relate to estimated closing levels of the Worldpay Merchant Solutions business' debt, working capital relative to an agreed target and available cash relative to an agreed minimum of not less than $1.5 billion and will be trued-up post-closing. We intend to use proceeds from the sale to retire debt and return additional capital to shareholders through our existing share repurchase authorization, as well as for general corporate purposes, while maintaining an investment grade credit rating. As of the closing, we retained a non-controlling 45% ownership interest in a new standalone Joint Venture with GTCR. In future reports, FIS' share of the net income of the Joint Venture will be reported as equity method investment earnings (loss). In connection with the closing of the Worldpay Sale, the Company entered into a limited liability company operating agreement (the "LLCA") with respect to the Joint Venture, and a registration rights agreement with respect to the Company’s retained equity interest in the Joint Venture. The LLCA provides that FIS has the right to appoint a minority of the board of managers of the Joint Venture and that FIS has customary consent and consultation rights with respect to certain material actions of the Joint Venture, in each case, subject to ownership stepdown thresholds. The LLCA contains, among other things, covenants and restrictions relating to other governance, liquidity and tax matters, including non-solicitation and non-competition covenants, distribution mechanics, preemptive rights and follow-on equity funding commitments of GTCR, and restrictions on transfer and associated tag-along and drag-along rights. Each of FIS and GTCR will have the right to require the Joint Venture to consummate an initial public offering ("IPO") or sale transaction after the fourth anniversary of the closing, subject to certain return hurdle and (in the case of an IPO) public float requirements, which requirements will fall away following the sixth anniversary of the closing. Also in connection with the closing of the Worldpay Sale, the Company entered into additional agreements with certain Worldpay entities, including: •commercial arrangements whereby each party would provide (i) referrals in connection with certain products and services provided by the other party, which are generally structured as revenue shares, and (ii) certain commercial services to the other party; •a transition services agreement whereby the Company will continue to provide services in support of Worldpay and provide support for migration of the services for up to 24 months (subject to a six-month extension). In addition, the Joint Venture will provide reverse services so that the Company may maintain access to certain resources and services transferred to the Joint Venture in the Worldpay Sale; •an employee leasing agreement pursuant to which FIS will lease certain employees to Worldpay in the United States, China, Colombia and South Korea for up to five months after the closing and in the Netherlands for up to two months after closing; and •a data sharing agreement governing the sharing of data, including across the post-closing services agreements.