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Fair Values of Financial Instruments (Assumptions Used in Estimating Fair Value) (Details) - Fixed Index Annuities	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Minimum | Contract Duration (Years), 1-5
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	1 year
Minimum | Contract Duration (Years), 6-10
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	6 years
Minimum | Contract Duration (Years), 11-15
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	11 years
Minimum | Contract Duration (Years), 16-20
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	16 years
Minimum | Contract Duration (Years), 20 or More
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	20 years
Maximum | Contract Duration (Years), 1-5
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	5 years
Maximum | Contract Duration (Years), 6-10
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	10 years
Maximum | Contract Duration (Years), 11-15
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	15 years
Maximum | Contract Duration (Years), 16-20
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Contract duration (years)	20 years
Average | Contract Duration (Years), 1-5
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Average lapse rates	2.08%	2.17%
Average partial withdrawal rates	1.87%	1.86%
Average | Contract Duration (Years), 6-10
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Average lapse rates	3.28%	3.28%
Average partial withdrawal rates	1.96%	1.97%
Average | Contract Duration (Years), 11-15
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Average lapse rates	3.65%	3.63%
Average partial withdrawal rates	1.83%	1.86%
Average | Contract Duration (Years), 16-20
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Average lapse rates	9.14%	8.55%
Average partial withdrawal rates	3.03%	2.96%
Average | Contract Duration (Years), 20 or More
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Average lapse rates	4.92%	4.90%
Average partial withdrawal rates	1.81%	1.81%

X

- Definition

Long Duration Contracts, Assumptions By Product And Guarantee, Contract Duration

+ References

No definition available.

+ Details

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- Definition

Anticipated rate of future terminations of contracts in force as of the balance sheet date, which is included in determining the amount of the specified guaranteed benefit obligation as of the balance sheet date.

+ References

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

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 55
-Paragraph 15
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=124504833&loc=d3e7104-158389

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439

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- 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

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- Definition

Anticipated rate, classified as other, for assumptions included in determining the amount of the specified guaranteed benefit obligation.

+ References

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 https://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 (c)
-URI https://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 6
-URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439

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