XML 97 R87.htm IDEA: XBRL DOCUMENT
v3.23.3

Policyholders' account balances (Guaranteed Minimum Crediting Rates) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | $ 7,178 | $ 3,140 | $ 3,008 | $ 2,766
Universal Life |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 2,383 | 1,719 | 1,676 | 1,612
Universal Life | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 496 |  | 490 |
Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 377 |  | 394 |
Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 614 |  | 287 |
Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 896 |  | 505 |
Insurance, Other |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 4,795 | 1,421 | 1,332 | $ 1,154
Insurance, Other | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 1,763 |  | 717 |
Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 487 |  | 0 |
Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 1,746 |  | 191 |
Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 799 |  | 424 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Universal Life |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 622 |  | 567 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Universal Life | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 3 |  | 3 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 |  | 0 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 56 |  | 59 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 563 |  | 505 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Insurance, Other |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 3,846 |  | 1,026 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Insurance, Other | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 1,328 |  | 411 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 |  | 0 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 1,719 |  | 191 |
Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 799 |  | 424 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Universal Life |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 1,740 |  | 1,078 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Universal Life | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 472 |  | 456 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 377 |  | 394 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 558 |  | 228 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 333 |  | $ 0 |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Insurance, Other |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 626 | 0 |  |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Insurance, Other | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 112 | 0 |  |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 487 | 0 |  |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 27 | 0 |  |
Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Universal Life |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 21 | 31 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Universal Life | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 21 | 31 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Universal Life | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Insurance, Other |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 323 | 306 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Insurance, Other | Policyholder Account Balance, at Guaranteed Minimum Crediting Rate |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 323 | 306 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | 0 | 0 |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Insurance, Other | Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance | $ 0 | $ 0 |  |
Minimum | Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate | 2.01% |  |  |
Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate | 4.00% |  |  |
Maximum | Policyholder account balance, guaranteed minimum credit rating, range from 0000 to 0200 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate | 2.00% |  |  |
Maximum | Policyholder account balance, guaranteed minimum credit rating, range from 0201 to 0400 |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items] |  |  |  |
Policyholder Account Balance, Guaranteed Minimum Crediting Rate | 4.00% |  |  |

X
- Definition Guaranteed minimum crediting rate on policyholder account balance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29F Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A + Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditRating
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29F Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A + Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29F Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(14)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-7A + Details
Name: | us-gaap_PolicyholderFunds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_UniversalLifeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0150Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis=us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0151AndGreaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OtherInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=cb_PolicyholderAccountBalanceGuaranteedMinimumCreditRatingRangeUpTo0200Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=cb_PolicyholderAccountBalanceGuaranteedMinimumCreditRatingRangeFrom0201To0400Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis=us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeFrom0400AndGreaterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |