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 $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 77
MBS with embedded derivatives | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	0
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	(40)
Equity index call options | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	114
Equity index put options | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	2
Reinsurance contract (embedded derivative) | Annuity subsidiaries | Net earnings from discontinued operations
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 1