XML 50 R39.htm IDEA: XBRL DOCUMENT v3.24.1.1.u2

Description of Business - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of countries in which the entity operates	over 100 countries

X

- Definition

Description of the number of countries in which the company operates.

+ References

No definition available.

+ Details

Name:	flut_DescriptionOfTheNumberOfCountriesInWhichTheCompanyOperates
Namespace Prefix:	flut_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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