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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ (57)	$ (214)	$ 20	$ (196)
MBS with embedded derivatives | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	(1)	2	(1)	5
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	(182)	(601)	(222)	46
Equity index call options | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	123	383	237	(245)
Equity index put options | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	3	5	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	$ (3)	$ 1	$ (1)