BUSINESS SEGMENTS - NARRATIVE (Details)	6 Months Ended
Jun. 30, 2026 product_line
Segment Reporting [Abstract]
Number of product lines	3
Number Of Reportable Segments Disclosed By Definition Flag	false

Number Of Reportable Segments Disclosed By Definition Flag

No definition available.

Name:	cno_NumberOfReportableSegmentsDisclosedByDefinitionFlag
Namespace Prefix:	cno_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration