Discontinued Operations - Details of the results of the Annuity subsidiaries to be sold (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net earnings (loss) from discontinued operations	$ 152	$ (160)
Annuity subsidiaries | Net earnings (loss) from discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment income	447	415
Realized gains (losses) on securities	81	(223)
Other income	32	33
Total revenues	560	225
Annuity benefits	161	276
Annuity and supplemental insurance acquisition expenses	112	113
Other expenses	46	39
Total costs and expenses	319	428
Earnings (loss) before income taxes from discontinued operations	241	(203)
Provision (credit) for income taxes on operations	48	(43)
Tax liabilities triggered by pending sale	$ 41	$ 0