Cover Page - shares	3 Months Ended
Mar. 31, 2022	May 02, 2022
Document Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-16427
Entity Registrant Name	Fidelity National Information Services, Inc.
Entity Incorporation, State or Country Code	GA
Entity Tax Identification Number	37-1490331
Entity Address, Street Name	601 Riverside Avenue
Entity Address, City	Jacksonville
Entity Address, State	FL
Entity Address, Postal Zip Code	32204
City Area Code	904
Local Phone Number	438-6000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		610,771,236
Entity Central Index Key	0001136893
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Common Stock, par value $0.01 per share
Document Information
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FIS
Security Exchange Name	NYSE
1.700% Senior Notes due 2022
Document Information
Title of 12(b) Security	1.700% Senior Notes due 2022
Trading Symbol	FIS22B
Security Exchange Name	NYSE
0.125% Senior Notes due 2022
Document Information
Title of 12(b) Security	0.125% Senior Notes due 2022
Trading Symbol	FIS22C
Security Exchange Name	NYSE
0.750% Senior Notes due 2023
Document Information
Title of 12(b) Security	0.750% Senior Notes due 2023
Trading Symbol	FIS23A
Security Exchange Name	NYSE
1.100% Senior Notes due 2024
Document Information
Title of 12(b) Security	1.100% Senior Notes due 2024
Trading Symbol	FIS24A
Security Exchange Name	NYSE
0.625% Senior Notes due 2025
Document Information
Title of 12(b) Security	0.625% Senior Notes due 2025
Trading Symbol	FIS25B
Security Exchange Name	NYSE
1.500% Senior Notes due 2027
Document Information
Title of 12(b) Security	1.500% Senior Notes due 2027
Trading Symbol	FIS27
Security Exchange Name	NYSE
1.000% Senior Notes due 2028
Document Information
Title of 12(b) Security	1.000% Senior Notes due 2028
Trading Symbol	FIS28
Security Exchange Name	NYSE
2.250% Senior Notes due 2029
Document Information
Title of 12(b) Security	2.250% Senior Notes due 2029
Trading Symbol	FIS29
Security Exchange Name	NYSE
2.000% Senior Notes due 2030
Document Information
Title of 12(b) Security	2.000% Senior Notes due 2030
Trading Symbol	FIS30
Security Exchange Name	NYSE
3.360% Senior Notes due 2031
Document Information
Title of 12(b) Security	3.360% Senior Notes due 2031
Trading Symbol	FIS31
Security Exchange Name	NYSE
2.950% Senior Notes due 2039
Document Information
Title of 12(b) Security	2.950% Senior Notes due 2039
Trading Symbol	FIS39
Security Exchange Name	NYSE

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