Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

No definition available.

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- Definition

Area code of city

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No definition available.

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- Definition

End date of current fiscal year in the format --MM-DD.

+ References

No definition available.

+ Details

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- Definition

Boolean flag that is true only for a form used as an annual report.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 10-K
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-Section 310

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Subsection f

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-Name Form 40-F
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-Section 240
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Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.

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No definition available.

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- Definition

This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Boolean flag that is true only for a form used as a transition report.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

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- Definition

Documents incorporated by reference.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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-Section 12
-Subsection b-23

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- Definition

Address Line 1 such as Attn, Building Name, Street Name

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No definition available.

+ Details

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- Definition

Name of the City or Town

+ References

No definition available.

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Balance Type:	na
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- Definition

Code for the postal or zip code

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No definition available.

+ Details

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- Definition

Name of the state or province.

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No definition available.

+ Details

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- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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-Section 12
-Subsection b-2

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- Definition

Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.

+ References

No definition available.

+ Details

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- Definition

Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.

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No definition available.

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- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b-2

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- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

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- Definition

Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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- Definition

Two-character EDGAR code representing the state or country of incorporation.

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No definition available.

+ Details

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- Definition

Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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-Section 405

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- Definition

The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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- Definition

Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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Data Type:	xbrli:booleanItemType
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- Definition

Indicates that the company is a Smaller Reporting Company (SRC).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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-Section 12
-Subsection b-2

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Balance Type:	na
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- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
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-Subsection b-2

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Period Type:	duration

- Definition

Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Securities Act
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-Section 405

+ Details

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Balance Type:	na
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- References

+ Details

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Namespace Prefix:	dei_
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Balance Type:	na
Period Type:	duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	dei_
Data Type:	xbrli:normalizedStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection b

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Data Type:	dei:securityTitleItemType
Balance Type:	na
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- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Exchange Act
-Number 240
-Section 12
-Subsection d1-1

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- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

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Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2021	Feb. 21, 2022	Jun. 30, 2021
Cover
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
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 Address	601 Riverside Avenue
Entity Address, City	Jacksonville
Entity Address, State	FL
Entity Address, Zip Code	32204
City Area Code	904
Local Phone Number	438-6000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 87,314,922,669
Entity Common Stock, Shares Outstanding (in shares)		609,590,707
Documents Incorporated by Reference	The information in Part III hereof is incorporated herein by reference to the registrant’s Proxy Statement on Schedule 14A for the fiscal year ended December 31, 2021, to be filed within 120 days after the close of the fiscal year that is the subject of this Report.
Entity Central Index Key	0001136893
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Common Stock, par value $0.01 per share \| New York Stock Exchange
Cover
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 \| New York Stock Exchange
Cover
Title of 12(b) Security	1.700% Senior Notes due 2022
Trading Symbol	FIS22B
Security Exchange Name	NYSE
0.125% Senior Notes due 2022 \| New York Stock Exchange
Cover
Title of 12(b) Security	0.125% Senior Notes due 2022
Trading Symbol	FIS22C
Security Exchange Name	NYSE
0.750% Senior Notes due 2023 \| New York Stock Exchange
Cover
Title of 12(b) Security	0.750% Senior Notes due 2023
Trading Symbol	FIS23A
Security Exchange Name	NYSE
1.100% Senior Notes due 2024 \| New York Stock Exchange
Cover
Title of 12(b) Security	1.100% Senior Notes due 2024
Trading Symbol	FIS24A
Security Exchange Name	NYSE
0.625% Senior Notes due 2025 \| New York Stock Exchange
Cover
Title of 12(b) Security	0.625% Senior Notes due 2025
Trading Symbol	FIS25B
Security Exchange Name	NYSE
1.500% Senior Notes due 2027 \| New York Stock Exchange
Cover
Title of 12(b) Security	1.500% Senior Notes due 2027
Trading Symbol	FIS27
Security Exchange Name	NYSE
1.000% Senior Notes due 2028 \| New York Stock Exchange
Cover
Title of 12(b) Security	1.000% Senior Notes due 2028
Trading Symbol	FIS28
Security Exchange Name	NYSE
2.250% Senior Notes due 2029 \| New York Stock Exchange
Cover
Title of 12(b) Security	2.250% Senior Notes due 2029
Trading Symbol	FIS29
Security Exchange Name	NYSE
2.000% Senior Notes due 2030 \| New York Stock Exchange
Cover
Title of 12(b) Security	2.000% Senior Notes due 2030
Trading Symbol	FIS30
Security Exchange Name	NYSE
3.360% Senior Notes due 2031 \| New York Stock Exchange
Cover
Title of 12(b) Security	3.360% Senior Notes due 2031
Trading Symbol	FIS31
Security Exchange Name	NYSE
2.950% Senior Notes due 2039 \| New York Stock Exchange
Cover
Title of 12(b) Security	2.950% Senior Notes due 2039
Trading Symbol	FIS39
Security Exchange Name	NYSE