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Investments - Schedule of Changes in Allowance for Expected Credit Losses on Mortgage Loans (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning Balance | $ (70) | $ (66)
Provision expense for loan losses | (3) | (1)
Ending Balance | (73) | (67)
Residential Mortgage |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning Balance | (53) | (54)
Provision expense for loan losses | (3) | 0
Ending Balance | (56) | (54)
Commercial Mortgage |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning Balance | (17) | (12)
Provision expense for loan losses | 0 | (1)
Ending Balance | $ (17) | $ (13)

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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- Details
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Data Type: | na
Balance Type: |
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- Details
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Balance Type: |
Period Type: |