Discontinued Operations - Gain (loss) included in the Statement of Earnings for changes in the fair value of derivatives that do not qualify for hedge accounting (Details) - Not designated as hedging instrument - USD ($) $ in Millions	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	May 31, 2021	Sep. 30, 2020
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 0	$ 198	$ 20	$ 2
MBS with embedded derivatives | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	0	(3)	(1)	2
Fixed-indexed and variable-indexed annuities (embedded derivative) | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	0	(5)	(222)	41
Equity index call options | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	0	203	237	(42)
Equity index put options | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	0	2	5	1
Reinsurance contract (embedded derivative) | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 0	$ 1	$ 1	$ 0