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	9 Months Ended
	Sep. 30, 2021 USD ($)
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 20
MBS with embedded derivatives | Annuity subsidiaries
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	(1)
Fixed-indexed and variable-indexed annuities (embedded derivative) | Annuity subsidiaries
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	(222)
Equity index call options | Annuity subsidiaries
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	237
Equity index put options | Annuity subsidiaries
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	5
Reinsurance contract (embedded derivative) | Annuity subsidiaries
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Derivative	$ 1