Debt - (Narrative) (Details) | May 29, 2019USD ($) | Sep. 21, 2018USD ($) | Jul. 31, 2019USD ($) | Jun. 30, 2019USD ($) | Jun. 30, 2018USD ($) | Jun. 30, 2019EUR (€) | May 21, 2019USD ($) | May 21, 2019EUR (€) | May 21, 2019GBP (£) | Mar. 31, 2019USD ($) | Dec. 31, 2018USD ($) | Sep. 30, 2017EUR (€) | Sep. 30, 2017GBP (£) |
Debt Instrument | | | | | | | | | | | | | |
Proceeds from borrowings | | | | $ 19,201,000,000 | $ 5,703,000,000 | | | | | | | | |
Debt issuance cost | | | | 114,000,000 | | | | | | | | | |
Fair value aggregate difference | | | | 759,000,000 | | | | | | | | | |
Revolving Credit Facility | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility outstanding amount | | | | $ 0 | | | | | | | $ 208,000,000 | | |
Euro Commercial Paper Program | FIS Credit Agreements | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Commercial paper | € | | | | | | € 1,500,000,000 | | | | | | | |
Senior Euro Notes due July 2024, interest payable annually at 1.100% (2024 Euro Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
FIS Credit Agreements | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Unamortized discount (premium), net | | | | $ 33,000,000 | | | | | | | | | |
Debt issuance cost | | | | 114,000,000 | | | | | | | | | |
Revolving Credit Facility | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility outstanding amount | | | | 0 | | | | | | | | | |
Borrowing capacity remaining | | | | $ 5,497,000,000 | | | | | | | | | |
Revolving Credit Facility | FIS Credit Agreements | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility maximum borrowing amount | $ 5,500,000,000 | $ 4,000,000,000 | | | $ 3,000,000,000 | | | | | | | | |
Senior Notes due October 2020, interest payable semi-annually at 3.625% (2020 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 1 month | | | | | | | | | |
Senior Notes due October 2022, interest payable semi-annually at 4.500% (2022 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 2 months | | | | | | | | | |
Senior GBP Notes due June 2022, interest payable annually at 1.700% (2022 GBP Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 1 month | | | | | | | | | |
Senior Notes due June 2024, interest payable semi-annually at 3.875% (2024 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
Senior Notes due April 2023, interest payable semi-annually at 3.500% (2023 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
Senior Notes due May 2028, interest payable semi-annually at 4.250% (2028 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
Senior Notes due August 2046, interest payable semi-annually at 4.500% (2046 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 6 months | | | | | | | | | |
Senior Notes due May 2048, interest payable semi-annually at 4.750% (2048 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 6 months | | | | | | | | | |
Senior Notes due August 2021, interest payable semi-annually at 2.250% (2021 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 1 month | | | | | | | | | |
Senior Euro Notes due January 2021, interest payable annually at 0.400% (2021 Euro Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 1 month | | | | | | | | | |
Senior Notes due October 2025, interest payable semi-annually at 5.000% (2025 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
Senior Notes due August 2026, interest payable semi-annually at 3.000% (2026 Notes) | Minimum | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Percentage of redemption price | | | | 100.00% | | | | | | | | | |
Trigger price, period prior to maturity | | | | 3 months | | | | | | | | | |
Commercial paper | Euro Commercial Paper Program | FIS Credit Agreements | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility maximum borrowing amount | $ 4,700,000,000 | | | | | | | | | | | | |
Debt instrument, term | 183 days | | | | | | | | | | | | |
Commercial paper | | | | $ 1,500,000,000 | | | | | | | | | |
Weighted average interest rate | | | | (0.19%) | | (0.19%) | | | | | | | |
Commercial paper | Euro Commercial Paper Program | FIS Credit Agreements | Subsequent Event | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Commercial paper | | | $ 2,900,000,000 | | | | | | | | | | |
Weighted average interest rate | | | (0.15%) | | | | | | | | | | |
Proceeds from borrowings | | | $ 1,400,000,000 | | | | | | | | | | |
Commercial paper | Commercial Paper Program | FIS Credit Agreements | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | | | | $ 0 | | | | | | | $ 250,000,000 | | |
Credit facility maximum borrowing amount | | $ 4,000,000,000 | | | | | | | | | | | |
Debt instrument, term | | 397 days | | | | | | | | | | | |
Bridge loan | Letter of credit | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility maximum borrowing amount | | | | | | | | | | $ 9,500,000,000 | | | |
Letter of credit | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Credit facility outstanding amount | | | | $ 3,000,000 | | | | | | | | | |
Senior notes | Senior Euro Floating Rate Notes due May 2021, interest payable quarterly (Floating Rate Notes) (1) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 500,000,000 | | | | | |
Weighted average interest rate | | | | 0.09% | | 0.09% | | | | | | | |
Senior notes | Senior Euro Notes due May 2021, interest payable annually at 0.125% (May 2021 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 500,000,000 | | | | | |
Debt instrument, stated percentage | | | | 0.125% | | 0.125% | 0.125% | 0.125% | 0.125% | | | | |
Senior notes | Senior Euro Notes due May 2023, interest payable annually at 0.750% (2023 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 1,250,000,000 | | | | | |
Debt instrument, stated percentage | | | | 0.75% | | 0.75% | | | | | | | |
Senior notes | Senior Euro Notes due May 2027, interest payable annually at 1.500% (2027 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 1,250,000,000 | | | | | |
Debt instrument, stated percentage | | | | 1.50% | | 1.50% | 1.50% | 1.50% | 1.50% | | | | |
Senior notes | Senior Euro Notes due May 2030, interest payable annually at 2.000% (2030 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 1,000,000,000 | | | | | |
Debt instrument, stated percentage | | | | 2.00% | | 2.00% | | | | | | | |
Senior notes | Senior Euro Notes due May 2039, interest payable annually at 2.950% (2039 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | € 500,000,000 | | | | | |
Debt instrument, stated percentage | | | | 2.95% | | 2.95% | 2.95% | 2.95% | 2.95% | | | | |
Senior notes | Senior GBP Notes due May 2025, interest payable annually at 2.602% (2025 GBP Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | £ | | | | | | | | | £ 625,000,000 | | | | |
Debt instrument, stated percentage | | | | 2.602% | | 2.602% | 2.602% | 2.602% | 2.602% | | | | |
Senior notes | Senior GBP Notes due May 2031, interest payable annually at 3.360% (2031 GBP Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | £ | | | | | | | | | £ 625,000,000 | | | | |
Debt instrument, stated percentage | | | | 3.36% | | 3.36% | 3.36% | 3.36% | 3.36% | | | | |
Senior notes | Senior Notes due May 2029, interest payable semi-annually at 3.750% (2029 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | | | | | | | $ 1,000,000,000 | | | | | | |
Debt instrument, stated percentage | | | | 3.75% | | 3.75% | 3.75% | 3.75% | 3.75% | | | | |
Senior notes | Senior Euro Notes due July 2024, interest payable annually at 1.100% (2024 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | | | | | € 500,000,000 | |
Debt instrument, stated percentage | | | | 1.10% | | 1.10% | | | | | | | |
Senior notes | Senior Euro Notes due July 2024, interest payable annually at 1.100% (2024 Euro Notes) | Fair Value Hedging | Interest rate swap | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Derivative asset fair value | | | | $ 14,000,000 | | | | | | | | | |
Senior notes | Senior Notes due October 2020, interest payable semi-annually at 3.625% (2020 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 3.625% | | 3.625% | | | | | | | |
Senior notes | Senior Notes due October 2022, interest payable semi-annually at 4.500% (2022 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 4.50% | | 4.50% | | | | | | | |
Senior notes | Senior GBP Notes due June 2022, interest payable annually at 1.700% (2022 GBP Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | £ | | | | | | | | | | | | | £ 300,000,000 |
Debt instrument, stated percentage | | | | 1.70% | | 1.70% | | | | | | | |
Senior notes | Senior Notes due June 2024, interest payable semi-annually at 3.875% (2024 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 3.875% | | 3.875% | | | | | | | |
Senior notes | Senior Notes due April 2023, interest payable semi-annually at 3.500% (2023 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 3.50% | | 3.50% | | | | | | | |
Senior notes | Senior Notes due May 2028, interest payable semi-annually at 4.250% (2028 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 4.25% | | 4.25% | | | | | | | |
Senior notes | Senior Notes due August 2046, interest payable semi-annually at 4.500% (2046 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 4.50% | | 4.50% | | | | | | | |
Senior notes | Senior Notes due May 2048, interest payable semi-annually at 4.750% (2048 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 4.75% | | 4.75% | | | | | | | |
Senior notes | Senior Notes due August 2021, interest payable semi-annually at 2.250% (2021 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 2.25% | | 2.25% | | | | | | | |
Senior notes | Senior Euro Notes due January 2021, interest payable annually at 0.400% (2021 Euro Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Principal amount of debt | € | | | | | | | | | | | | € 500,000,000 | |
Debt instrument, stated percentage | | | | 0.40% | | 0.40% | | | | | | | |
Senior notes | Senior Notes due October 2025, interest payable semi-annually at 5.000% (2025 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 5.00% | | 5.00% | | | | | | | |
Senior notes | Senior Notes due August 2026, interest payable semi-annually at 3.000% (2026 Notes) | | | | | | | | | | | | | |
Debt Instrument | | | | | | | | | | | | | |
Debt instrument, stated percentage | | | | 3.00% | | 3.00% | | | | | | | |