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Derivatives (Fair Value Hedges) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Fixed Maturities [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | $ (136) | $ (161)
Debt Instruments, Carrying Amount | 1,411 | 2,164
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 1 | (1)
Mortgages [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | 331 | 634
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | (19) | 3
Future policy benefits [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (3,524) | (4,735)
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 276 | (877)
Policyholder Account Balances [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Debt Instruments, Carrying Amount | (1,080) | 0
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | $ 27 | $ 0

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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959 + Details
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