Accumulated Difference Between Fair Value And Carrying Value of Long Term Debt

No definition available.

Name:	fis_AccumulatedDifferenceBetweenFairValueAndCarryingValueofLongTermDebt
Namespace Prefix:	fis_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Make Whole Amount, Trigger, Period Prior to Maturity

+ References

No definition available.

+ Details

Name:	fis_DebtInstrumentMakeWholeAmountTriggerPeriodPriortoMaturity
Namespace Prefix:	fis_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Repurchase Amount of Premium

+ References

No definition available.

+ Details

Name:	fis_DebtInstrumentRepurchaseAmountofPremium
Namespace Prefix:	fis_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Extinguishment of Tender Premium

+ References

No definition available.

+ Details

Name:	fis_ExtinguishmentofTenderPremium
Namespace Prefix:	fis_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fair Value, Aggregate Differences, Long-term Debt Instruments

+ References

No definition available.

+ Details

Name:	fis_FairValueAggregateDifferencesLongtermDebtInstruments
Namespace Prefix:	fis_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt discount (premium).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28567-108399

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=fis_FidelityNationalInformationServicesInc.CreditAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_FidelityNationalInformationServicesInc.CreditAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_AnyAndAllTenderOfferMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_RemainingAnyAndAllNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_TheMaximumTenderOfferNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_AnyAndAllNotesAndMaximumTenderOfferNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_FixedEuroSeniorNotesPointOneToFiveThruOnePointZeroDue2022Thru2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_FixedSterlingSeniorNotesTwoPointTwoFiveDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_SeniorEuroFloatingRateNotesdueMay2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_SeniorEuroNotesPointOneTwoFiveThruTwoPointNineFiveZeroDue2025to2039Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_SeniorSterlingNotesTwoPointSixZeroTwoThruThreePointThreeSixZeroDue2025to2031Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_ThreePointSevenFivePercentSeniorNotesDueMay2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_FivePointZeroPercentSeniorNotesDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=fis_EuroCommercialPaperProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_BridgeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Narrative) (Details) £ in Millions			1 Months Ended	12 Months Ended
Debt (Narrative) (Details) £ in Millions	Jul. 25, 2017 USD ($)	Mar. 15, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 03, 2019 EUR (€)	Dec. 03, 2019 GBP (£)	May 29, 2019 USD ($)	May 21, 2019 USD ($)	May 21, 2019 EUR (€)	Mar. 31, 2019 USD ($)	Sep. 21, 2018 USD ($)
Debt Instrument
Weighted average interest rate (percent)			1.66%	1.66%
Principal amount of debt redeemed				$ 24,672,000,000	$ 26,148,000,000	$ 11,689,000,000
Loss on extinguishment of debt				217,000,000	1,000,000	$ 196,000,000
Fair value of long-term debt			$ 900,000,000	900,000,000
Difference in carrying value and fair value of long term debt			140,000,000	140,000,000
FIS Credit Agreement \| Senior Commercial Paper Notes
Debt Instrument
Total committed capital, credit agreement													$ 4,000,000,000.0
Letter of Credit
Debt Instrument
Credit facility outstanding amount			3,000,000	3,000,000
Revolving Credit Facility \| FIS Credit Agreement
Debt Instrument
Total committed capital, credit agreement									$ 5,500,000,000
FIS Credit Agreement
Debt Instrument
Unamortized discount (premium), net			36,000,000	$ 36,000,000
Senior Notes
Debt Instrument
Extinguishment of tender premium	$ 171,000,000
Amount redeemed	$ 2,000,000,000.0
Weighted average interest rate, long term debt (percent)	4.00%
Tender offer costs	$ 150,000,000
Senior note redemption price, percentage				100.00%
Senior Notes \| Minimum
Debt Instrument
Make whole amount, trigger period prior to maturity				1 month
Senior Notes \| Maximum
Debt Instrument
Make whole amount, trigger period prior to maturity				6 months
Senior Notes \| Any And All Notes
Debt Instrument
Face amount of debt			$ 1,342,000,000	$ 1,342,000,000
Senior Notes \| Any And All Notes \| Minimum
Debt Instrument
Debt instrument, stated percentage (percent)			2.25%	2.25%
Senior Notes \| Any And All Notes \| Maximum
Debt Instrument
Debt instrument, stated percentage (percent)			4.50%	4.50%
Senior Notes \| Remaining Any And All Notes
Debt Instrument
Principal amount of debt redeemed			$ 858,000,000
Senior Notes \| The Maximum Tender Offer Notes
Debt Instrument
Principal amount of debt redeemed			$ 812,000,000
Senior Notes \| The Maximum Tender Offer Notes \| Minimum
Debt Instrument
Debt instrument, stated percentage (percent)			4.50%	4.50%
Senior Notes \| The Maximum Tender Offer Notes \| Maximum
Debt Instrument
Debt instrument, stated percentage (percent)			5.00%	5.00%
Senior Notes \| Any And All Notes And Maximum Tender Offer Notes
Debt Instrument
Principal amount of debt redeemed			$ 3,000,000,000.0
Extinguishment of tender premium			$ 217,000,000
Senior Notes \| Fixed Euro Senior Notes .125% thru 1.000 Due 2029
Debt Instrument
Face amount of debt \| €							€ 2,250,000,000
Senior Notes \| Fixed Euro Senior Notes .125% thru 1.000 Due 2029 \| Minimum
Debt Instrument
Debt instrument, stated percentage (percent)							0.13%	0.13%
Senior Notes \| Fixed Euro Senior Notes .125% thru 1.000 Due 2029 \| Maximum
Debt Instrument
Debt instrument, stated percentage (percent)							1.00%	1.00%
Senior Notes \| Senior GBP Notes 2.250% Due 2029
Debt Instrument
Face amount of debt \| £								£ 300
Debt instrument, stated percentage (percent)							2.25%	2.25%
Senior Notes \| Senior Euro Floating Rate Notes due May 2021, interest payable quarterly (Floating Rate Notes)
Debt Instrument
Face amount of debt \| €											€ 500,000,000
Senior Notes \| Euro Senior Notes .125% thru 2.950 Due 2039
Debt Instrument
Face amount of debt \| €											€ 4,500,000,000
Senior Notes \| Euro Senior Notes .125% thru 2.950 Due 2039 \| Minimum
Debt Instrument
Debt instrument, stated percentage (percent)										0.13%	0.13%
Senior Notes \| Euro Senior Notes .125% thru 2.950 Due 2039 \| Maximum
Debt Instrument
Debt instrument, stated percentage (percent)										2.95%	2.95%
Senior Notes \| Senior Sterling Notes 2.602% thru 3.360 Due 2031
Debt Instrument
Face amount of debt \| €											€ 1,250,000,000
Senior Notes \| Senior Sterling Notes 2.602% thru 3.360 Due 2031 \| Minimum
Debt Instrument
Debt instrument, stated percentage (percent)										2.60%	2.60%
Senior Notes \| Senior Sterling Notes 2.602% thru 3.360 Due 2031 \| Maximum
Debt Instrument
Debt instrument, stated percentage (percent)										3.36%	3.36%
Senior Notes \| Senior USD Note 3.750% Due 2029
Debt Instrument
Face amount of debt										$ 1,000,000,000.0
Debt instrument, stated percentage (percent)										3.75%	3.75%
Senior Notes \| March 2022 Notes
Debt Instrument
Debt instrument, stated percentage (percent)		5.00%
Amount redeemed		$ 700,000,000
Percentage of principal amount redeemed		100.00%
Loss on extinguishment of debt		$ 25,000,000
Revolving Credit Facility
Debt Instrument
Weighted average interest rate, long term debt (percent)			2.80%	2.80%
Credit facility outstanding amount			$ 600,000,000	$ 600,000,000	208,000,000
Additional term and revolving loan capacity in the future			$ 4,897,000,000	$ 4,897,000,000
Revolving Credit Facility \| FIS Credit Agreement
Debt Instrument
Total committed capital, credit agreement					$ 3,000,000,000.0								$ 4,000,000,000.0
Revolving Credit Facility \| Senior Notes
Debt Instrument
Repayments of revolving loan	$ 469,000,000
Senior Commercial Paper Notes \| ECP Notes \| FIS Credit Agreement
Debt Instrument
Total committed capital, credit agreement									$ 4,700,000,000
Bridge Loan \| Letter of Credit
Debt Instrument
Total committed capital, credit agreement												$ 9,500,000,000