Financial Instruments	12 Months Ended
Financial Instruments	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	Financial Instruments Fair Value Hedges The Company holds interest rate swaps with aggregate notional amounts of $1,854 million, £925 million and €500 million at December 31, 2022 and 2021, respectively, converting the interest rate exposure on certain of the Company's Senior USD Notes, Senior GBP Notes and Senior Euro Notes, as applicable, from fixed to variable. These swaps are designated as fair value hedges for accounting purposes with a net liability fair value of $578 million and $85 million, reflected as a decrease in the long-term debt balance at December 31, 2022 and 2021, respectively (see Note 12). Net Investment Hedges The purpose of the Company's net investment hedges, as discussed below, is to reduce the volatility of FIS' net investment value in its Euro- and Pound Sterling-denominated operations due to changes in foreign currency exchange rates. The Company recorded net investment hedge aggregate gain (loss) for the change in fair value and related income tax (expense) benefit within Other comprehensive earnings (loss), net of tax, on the consolidated statements of comprehensive earnings (loss) of $1,034 million, $878 million and $(951) million, during the years ended December 31, 2022, 2021 and 2020, respectively. No ineffectiveness has been recorded on the net investment hedges. Foreign Currency-Denominated Debt Designations The Company designates certain foreign currency-denominated debt as net investment hedges of its investment in Euro- and Pound Sterling-denominated operations. As of December 31, 2022 and 2021, an aggregate €7,646 million and €8,275 million, respectively was designated as a net investment hedge of the Company's investment in Euro-denominated operations related to Senior Euro Notes with maturities ranging from 2023 to 2039 and ECP Notes. As of December 31, 2022 and 2021, an aggregate £726 million and £1,193 million, respectively, was designated as a net investment hedge of the Company's Pound Sterling-denominated operations related to the Senior GBP Notes with maturities ranging from 2029 to 2031. Cross-Currency Interest Rate Swap Designations The Company holds cross-currency interest rate swaps and designates them as net investment hedges of its investment in Euro- and Pound Sterling-denominated operations. As of December 31, 2022 and 2021, aggregate notional amounts of €6,343 million and €5,906 million, respectively, were designated as net investment hedges of the Company's investment in Euro-denominated operations, and aggregate notional amounts of £2,580 million and £2,345 million, respectively, were designated as net investment hedges of the Company's Pound Sterling-denominated operations. The cross-currency interest rate swap fair values were net assets of $264 million and $258 million at December 31, 2022 and 2021, respectively. During the year ended December 31, 2022, the Company received net proceeds of approximately $726 million for the fair values of cross-currency interest rate swaps as of the termination dates primarily as a result of entering into transactions to cash settle existing cross-currency interest rate swaps designated as net investment hedges. The proceeds were recorded within investing activities on the consolidated statements of cash flows. Following the settlement of the existing cross-currency interest rate swaps, the Company entered into new cross-currency interest rate swaps at current market terms with similar notional amounts and maturity dates as the settled cross-currency interest rate swaps.