Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

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

- Definition

Value of input used to measure investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
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

No definition available.

+ Details

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

- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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

- Definition

Value of input used to measure servicing liability.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

FAIR VALUE DISCLOSURES - Quantitative Information About Level 3 (Details) - Level 3 $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Corporate \| Matrix pricing model
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 4	$ 9
Corporate \| Spread over Benchmark \| Matrix pricing model \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0245	0.0070
Corporate \| Spread over Benchmark \| Matrix pricing model \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0245	0.0145
Corporate \| Spread over Benchmark \| Matrix pricing model \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0245	0.0104
GMIBNLG \| Discounted cash flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ (8)
GMIBNLG \| Lapse rate \| Discounted cash flow \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0075
GMIBNLG \| Lapse rate \| Discounted cash flow \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.3542
GMIBNLG \| Lapse rate \| Discounted cash flow \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0599
GMIBNLG \| Withdrawal rate \| Discounted cash flow \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0020
GMIBNLG \| Withdrawal rate \| Discounted cash flow \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0124
GMIBNLG \| Withdrawal rate \| Discounted cash flow \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0091
GMIBNLG \| Annuitization rate \| Discounted cash flow \| Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0004
GMIBNLG \| Annuitization rate \| Discounted cash flow \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	1.0000
GMIBNLG \| Annuitization rate \| Discounted cash flow \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0292
GMIBNLG \| Non-performance Risk \| Discounted cash flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	147
GMIBNLG \| Non-performance Risk \| Discounted cash flow \| Weighted Average
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	147
GMIBNLG \| Mortality rates \| Discounted cash flow \| Minimum \| Age 0-40
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0001
GMIBNLG \| Mortality rates \| Discounted cash flow \| Minimum \| Age 41-60
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0006
GMIBNLG \| Mortality rates \| Discounted cash flow \| Minimum \| Age 61-115
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0032
GMIBNLG \| Mortality rates \| Discounted cash flow \| Maximum \| Age 0-40
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0017
GMIBNLG \| Mortality rates \| Discounted cash flow \| Maximum \| Age 41-60
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0052
GMIBNLG \| Mortality rates \| Discounted cash flow \| Maximum \| Age 61-115
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.4000
GMIBNLG \| Mortality rates \| Discounted cash flow \| Weighted Average \| Age 0-40
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0100
GMIBNLG \| Mortality rates \| Discounted cash flow \| Weighted Average \| Age 41-60
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0100
GMIBNLG \| Mortality rates \| Discounted cash flow \| Weighted Average \| Age 61-115
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.0100