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Derivative Instruments (Change in Fair Value of Derivatives Not Designated as Hedging) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ (415,374)	$ (536,404)	$ (2,695,007)	$ (545,104)
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	(150,924)	(70,701)	(1,128,302)	826,484
Change in fair value of embedded derivatives	(415,374)	(536,404)	(2,695,007)	(545,104)
Not Designated as Hedging Instrument | Call Options
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	(162,308)	(71,688)	(1,142,521)	825,381
Not Designated as Hedging Instrument | Warrants
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	83	987	262	1,103
Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	11,301	0	13,957	0
Not Designated as Hedging Instrument | Fixed Index Annuities - Embedded Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	(466,244)	(681,509)	(2,658,376)	(932,546)
Not Designated as Hedging Instrument | Other Changes in Difference Between Policy Benefit Reserves Computed Using Derivative Accounting Vs. Long-Duration Contracts Accounting
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	167,100	145,105	481,465	387,442
Not Designated as Hedging Instrument | Reinsurance Related Embedded Derivative
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ (116,230)	$ 0	$ (518,096)	$ 0

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

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Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 15
-URI https://asc.fasb.org/subtopic&trid=2229187

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