XML 72 R57.htm IDEA: XBRL DOCUMENT
v3.25.0.1

INVESTMENTS - SUMMARY OF FIXED MATURITY SECURITIES AVAILABLE FOR SALE (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 25,264.3 |
Estimated fair value | $ 22,840.5 | $ 21,506.2
Percentage of total estimated fair value | 100.00% |
NAIC designation 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 16,091.7 |
Estimated fair value | $ 14,522.4 |
Percentage of total estimated fair value | 63.60% |
NAIC designation 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 8,261.4 |
Estimated fair value | $ 7,480.6 |
Percentage of total estimated fair value | 32.80% |
Total NAIC 1 and 2 (investment grade) |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 24,353.1 |
Estimated fair value | $ 22,003.0 |
Percentage of total estimated fair value | 96.40% |
NAIC designation 3 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 635.2 |
Estimated fair value | $ 598.6 |
Percentage of total estimated fair value | 2.60% |
NAIC designation 4 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 236.2 |
Estimated fair value | $ 211.2 |
Percentage of total estimated fair value | 0.90% |
NAIC designation 5 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 18.6 |
Estimated fair value | $ 13.9 |
Percentage of total estimated fair value | 0.10% |
NAIC designation 6 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 21.2 |
Estimated fair value | $ 13.8 |
Percentage of total estimated fair value | 0.00% |
Total NAIC 3,4,5 and 6 (below-investment grade) |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized cost | $ 911.2 |
Estimated fair value | $ 837.5 |
Percentage of total estimated fair value | 3.60% |

X
- Definition Available-for sale Securities, Fair Value Disclosure, Percentage of Estimated Fair Value + References No definition available. + Details
Name: | cno_AvailableForSaleSecuritiesFairValueDisclosurePercentageOfEstimatedFairValue
Namespace Prefix: | cno_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_TotalNAICDesignation1and2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation4Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_Designation6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cno_NaicRatingAxis=cno_TotalNAICDesignation345and6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |