XML 68 R57.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

Long-Term Debt - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
First Incremental Term B Loans [Member] |  |  |
Debt Instrument, Redemption [Line Items] |  |  |
Proceeds from (repayments of) debt | $ 514 |  |
GBP Credit Facility [Member] |  |  |
Debt Instrument, Redemption [Line Items] |  |  |
Proceeds from (repayments of) debt | 126 | $ 609 |
Repayments of debt | 309 | $ 598 |
Revolving Credit Facility [Member] |  |  |
Debt Instrument, Redemption [Line Items] |  |  |
Line of credit facility, maximum amount outstanding during period | 716 |  | $ 537
Line of credit facility issuance guarantees | $ 13 |  | $ 13

X
- Definition Line of credit facility issuance guarantees. + References No definition available. + Details
Name: | flut_LineOfCreditFacilityIssuanceGuarantees
Namespace Prefix: | flut_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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_DebtInstrumentRedemptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings. + References No definition available. + Details
Name: | us-gaap_ProceedsFromRepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_RepaymentsOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=flut_FirstIncrementalTermBLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=flut_GbpCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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