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Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Sales Inducement Costs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Balances of and changes in DSIC |  |
Beginning balance | $ 148 | $ 167
Amortization | (16) | (19)
Ending balance | 132 | 148
Variable Annuities |  |
Balances of and changes in DSIC |  |
Beginning balance | 136 | 151
Amortization | (14) | (15)
Ending balance | 122 | 136
Fixed Annuities |  |
Balances of and changes in DSIC |  |
Beginning balance | 12 | 16
Amortization | (2) | (4)
Ending balance | $ 10 | $ 12

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- Definition Amount of amortization expense (reversal of expense) for deferred sales inducement cost. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-2B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479460/944-30-45-2 + Details
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- Definition Amount of deferred sale inducement cost capitalized on contract remaining in force. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-2B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-2B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479460/944-30-45-2 + Details
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