Schedule IV - Schedule of Reinsurance Level 4 - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
May 31, 2018	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net [Abstract]
Direct Premiums, Life Insurance in Force	$ 266,190	$ 259,930	$ 239,801	$ 249,728
Ceded Premiums Earned	197,736	191,858	174,372	181,779
Assumed Premiums, Life Insurance in Force	515	487	173	378
Premiums, Net, Life Insurance in Force	$ 68,969	$ 68,559	$ 65,602	$ 68,327
Life Insurance in Force Premiums, Percentage Assumed to Net	1.00%	1.00%	0.00%	1.00%
Premiums Earned, Net [Abstract]
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	11.00%	12.00%	16.00%	13.00%
Life and Annuity Insurance Product Line [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net [Abstract]
Net Fee Income Earned Premium and Other Life	$ 423	$ 533	$ 776	$ 863
Premiums Earned, Net [Abstract]
Direct Premiums Earned	1,033	1,404	2,201	2,350
Ceded Premiums Earned	658	937	1,550	1,602
Assumed Premiums Earned	$ 48	$ 66	$ 125	$ 115
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	11.00%	12.00%	16.00%	13.00%
Accident and Health Insurance Product Line [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net [Abstract]
Net Fee Income Earned Premium and Other Life	$ 0	$ 0	$ 0	$ 0
Premiums Earned, Net [Abstract]
Direct Premiums Earned	26	35	20	25
Ceded Premiums Earned	26	35	20	25
Assumed Premiums Earned	$ 0	$ 0	$ 0	$ 0
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Premium, Percentage Assumed to Net	0.00%	0.00%	0.00%	0.00%
Life Annuity Accident and Health Insurance Product Line [Member]
SEC Schedule, 12-17, Insurance Companies, Reinsurance, Life Insurance in Force, Net [Abstract]
Net Fee Income Earned Premium and Other Life	$ 423	$ 533	$ 776	$ 863
Premiums Earned, Net [Abstract]
Direct Premiums Earned	1,059	1,439	2,221	2,375
Ceded Premiums Earned	684	972	1,570	1,627
Assumed Premiums Earned	$ 48	$ 66	$ 125	$ 115

Amount of life insurance issued and outstanding assumed from other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column D
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 235
-Section S99
-Paragraph 2
-Subparagraph (SX 210.12-17(Column D))
-URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915

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Amount of life insurance issued and outstanding ceded to other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column C
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount, before effect of reinsurance, of life insurance issued and outstanding, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column B
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount, after effect of reinsurance, of life insurance issued and outstanding, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column E
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Percentage of assumed life insurance contract issued and outstanding to life insurance contract issued and outstanding after effect of reinsurance, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column F
-Subsection 17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Net fee income earned premium and other life.

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-Publisher FASB
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Amount of earned premiums ceded to other entities.

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Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums earned.

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Percentage of assumed premium earned to premium earned after effects of reinsurance, as disclosed in supplementary reinsurance information.

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