FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Fair value adjustments on GMIB asset	$ 263		$ 175
AFS fixed maturities transferred from Level 3 to Level 2	103	$ 104
AFS fixed maturities transferred from Level 3 to Level 2	$ 189	$ 14
AFS fixed maturities transferred between Level 2 and 3 (percentage)	2.00%	0.90%
Level 3 \| Fair Value, Nonrecurring
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Fair value measurements not included in quantitative information about level 3 fair value measurements	$ 417		$ 325

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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.

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Percentage of transfers into assets measured at fair value that have taken place during the period.

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- Definition

Represents tho fair value of level 3 fair value measurements of investments for which the underlying quantitative inputs are not developed by the Company or are not reasonably available.

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- Definition

Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

+ 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 (c)(3)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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