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v3.23.3

BUSINESS SEGMENTS - NARRATIVE (Details) | 9 Months Ended
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Sep. 30, 2023 product_line
Segment Reporting [Abstract] |
Number of product lines | 3

X
- Definition Number of Product Lines + References No definition available. + Details
Name: | cno_NumberofProductLines
Namespace Prefix: | cno_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration