Indicates the number of financing receivables under each classification.

No definition available.

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Namespace Prefix:	crbg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)
-Publisher SEC

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Percentage, before allowance for credit loss, of financing receivable to total financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (c)
-Publisher SEC

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Lending Activities - Credit quality performance indicators for commercial mortgages (Details) $ in Millions	Mar. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($) loan	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 48,544	$ 47,565
Allowance for credit losses	$ 714	$ 698	$ 659	$ 600
Commercial Mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	603	601
Total	$ 34,651	$ 34,172
Allowance for credit losses	$ 634	$ 614	$ 586	$ 531
Percent of Total	100.00%	100.00%
Percentage of total, allowance for credit losses	2.00%	2.00%
Commercial Mortgages \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	600	600
Total	$ 34,392	$ 34,154
Percent of Total	99.00%	100.00%
Commercial Mortgages \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	2	1
Total	$ 241	$ 18
Percent of Total	1.00%	0.00%
Commercial Mortgages \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Number of Loans \| loan	1	0
Total	$ 18	$ 0
Percent of Total	0.00%	0.00%
Commercial Mortgages \| Apartments
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 13,970	$ 13,861
Allowance for credit losses	75	85
Commercial Mortgages \| Apartments \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	13,970	13,861
Commercial Mortgages \| Apartments \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Apartments \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Offices
Financing Receivable, Credit Quality Indicator [Line Items]
Total	8,470	8,486
Allowance for credit losses	355	340
Commercial Mortgages \| Offices \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	8,391	8,468
Commercial Mortgages \| Offices \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	61	18
Commercial Mortgages \| Offices \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	18	0
Commercial Mortgages \| Offices \| Financial Asset, Less Than Or Equal To 90 Days Past Due \| Fortitude RE Funds Withheld Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Total	61
Commercial Mortgages \| Retail
Financing Receivable, Credit Quality Indicator [Line Items]
Total	3,923	3,787
Allowance for credit losses	79	74
Commercial Mortgages \| Retail \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	3,743	3,787
Commercial Mortgages \| Retail \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	180	0
Commercial Mortgages \| Retail \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Retail \| Financial Asset, Less Than Or Equal To 90 Days Past Due \| Fortitude RE Funds Withheld Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Total	20
Commercial Mortgages \| Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,092	5,908
Allowance for credit losses	89	83
Commercial Mortgages \| Industrial \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	6,092	5,908
Commercial Mortgages \| Industrial \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Industrial \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Hotel
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,793	1,805
Allowance for credit losses	31	27
Commercial Mortgages \| Hotel \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,793	1,805
Commercial Mortgages \| Hotel \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Hotel \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Others
Financing Receivable, Credit Quality Indicator [Line Items]
Total	403	325
Allowance for credit losses	5	5
Commercial Mortgages \| Others \| In good standing
Financing Receivable, Credit Quality Indicator [Line Items]
Total	403	325
Commercial Mortgages \| Others \| 90 days or less delinquent
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial Mortgages \| Others \| >90 days delinquent or in process of foreclosure
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0	$ 0