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Debt - (Principal Maturities of Long-Term Debt) (Details) - FIS Credit Agreements
$ in Millions
Mar. 31, 2020
USD ($)
Principal maturities of long-term debt  
2020 remaining period $ 75
2021 1,709
2022 1,510
2023 5,352
2024 956
Thereafter 10,168
Total principal payments 19,770
Debt issuance costs, net of accumulated amortization (106)
Total long-term debt $ 19,664