Business (Details)	Dec. 31, 2024 member state
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of medicare advantage members enrolled with private health plans \| member	526,500
Number of states with operations \| state	12

Number of Medicare Advantage members enrolled with private health plans.

No definition available.

Name:	agl_NumberOfMedicareAdvantageMembersEnrolledWithPrivateHealthPlans
Namespace Prefix:	agl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant