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Derivative Instruments (Carrying Amount and Cumulative Fair Value Hedging Adjustments) (Details) - Fixed Maturity Securities, Available For Sale - Fair Value Hedging - Derivatives designated as hedging instruments - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Derivative [Line Items] |  |
Current hedging relationships, amortized cost of hedged item | $ 389,060 | $ 0
Current hedging relationships, cumulative amount of fair value basis adjustment gain (loss) | (39,128) | 0
Discontinued hedging relationships, amortized cost of hedged item | 1,594,736 | 0
Discontinued hedging relationships, cumulative amount of fair value basis adjustment gain (loss) | $ (94,681) | $ 0

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- Definition Hedged Asset, Discontinued Fair Value Hedge + References No definition available. + 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, 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 asset hedged in fair value hedging relationship. + 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 (a) -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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