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Fair Values of Financial Instruments (Assumptions Used in Estimating Fair Value) (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Expected cost of annual call options | 2.10% | 2.10%
Fixed Index Annuities | Minimum | Contract Duration (Years), 1-5 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 1 year | 1 year
Fixed Index Annuities | Minimum | Contract Duration (Years), 6-10 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 6 years | 6 years
Fixed Index Annuities | Minimum | Contract Duration (Years), 11-15 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 11 years | 11 years
Fixed Index Annuities | Minimum | Contract Duration (Years), 16-20 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 16 years | 16 years
Fixed Index Annuities | Minimum | Contract Duration (Years), 20 or More |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 20 years | 20 years
Fixed Index Annuities | Maximum | Contract Duration (Years), 1-5 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 5 years | 5 years
Fixed Index Annuities | Maximum | Contract Duration (Years), 6-10 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 10 years | 10 years
Fixed Index Annuities | Maximum | Contract Duration (Years), 11-15 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 15 years | 15 years
Fixed Index Annuities | Maximum | Contract Duration (Years), 16-20 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Contract duration (years) | 20 years | 20 years
Fixed Index Annuities | Average | Contract Duration (Years), 1-5 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Average lapse rates | 3.13% | 3.04%
Average partial withdrawal rates | 2.20% | 2.19%
Fixed Index Annuities | Average | Contract Duration (Years), 6-10 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Average lapse rates | 2.91% | 2.84%
Average partial withdrawal rates | 2.27% | 2.26%
Fixed Index Annuities | Average | Contract Duration (Years), 11-15 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Average lapse rates | 4.32% | 4.47%
Average partial withdrawal rates | 2.11% | 2.14%
Fixed Index Annuities | Average | Contract Duration (Years), 16-20 |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Average lapse rates | 9.30% | 8.93%
Average partial withdrawal rates | 1.30% | 1.33%
Fixed Index Annuities | Average | Contract Duration (Years), 20 or More |  |
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items] |  |
Average lapse rates | 4.97% | 4.93%
Average partial withdrawal rates | 0.00% | 0.00%

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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 http://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 http://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 http://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 + Details
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