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Derivative Instruments (Change in Fair Value of Derivatives Not Designated as Hedging) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ (885,984)	$ 273,713	$ (2,279,633)	$ (8,700)
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	(499,859)	500,880	(977,378)	897,185
Change in fair value of embedded derivatives	(885,984)	273,713	(2,279,633)	(8,700)
Not Designated as Hedging Instrument | Call Options
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	(501,765)	500,793	(980,213)	897,069
Not Designated as Hedging Instrument | Warrants
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	(750)	87	179	116
Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of derivatives	2,656	0	2,656	0
Not Designated as Hedging Instrument | Fixed Index Annuities - Embedded Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	(884,009)	126,084	(2,192,132)	(251,037)
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	197,447	147,629	314,365	242,337
Not Designated as Hedging Instrument | Reinsurance Related Embedded Derivative
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of embedded derivatives	$ (199,422)	$ 0	$ (401,866)	$ 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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