Guaranteed Benefit Features - Guaranteed Death and Benefit (Details)	12 Months Ended
Dec. 31, 2021
Stabilizer and MCGs
Liabilities for Guarantees on Long-Duration Contracts [Line Items]
Guaranteed credited rates	1.00%

Rate of guaranteed minimum return on deposits made to contracts reported in separate accounts maintained by an insurance entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=124504833&loc=d3e7104-158389

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 80
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473

Name:	us-gaap_NetAmountAtRiskByProductAndGuaranteeGuaranteedMinimumReturnRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration