Investments - Components of the net unrealized gain on securities that is included in AOCI in the Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Unrealized gain on:
Pretax		$ 1,589
Deferred Tax		(334)
Net		1,255
Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		1,305
Deferred Tax		(274)
Net		1,031
Total fixed maturities
Unrealized gain on:
Pretax	$ 260	284
Deferred Tax	(55)	(60)
Net	$ 205	224
Fixed maturities — annuity segment | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		2,555
Deferred Tax		(536)
Net		2,019
Deferred policy acquisition costs — annuity segment | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		(934)
Deferred Tax		196
Net		(738)
Annuity benefits accumulated | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		(324)
Deferred Tax		68
Net		(256)
Life, accident and health reserves | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		(3)
Deferred Tax		0
Net		(3)
Unearned revenue | Annuity subsidiaries | Net earnings (loss) from discontinued operations
Unrealized gain on:
Pretax		11
Deferred Tax		(2)
Net		$ 9