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, 2021
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ (57)	$ 20
MBS with embedded derivatives | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	(1)	(1)
Fixed-indexed and variable-indexed annuities (embedded derivative) | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	(182)	(222)
Equity index call options | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	123	237
Equity index put options | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	3	5
Reinsurance contract (embedded derivative) | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 0	$ 1