Deferred Policy Acquisition Costs -Deferred policy acquisition costs activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred policy acquisition costs activity
Balance, beginning of year	$ 3,774	$ 3,600	$ 3,457
Acquisition costs deferred	6,874	5,651	5,499
Amortization charged to income	(6,252)	(5,477)	(5,353)
Effect of unrealized gains and losses	2	0	(3)
Balance, end of year	4,722	3,774	3,600
National General
Deferred policy acquisition costs activity
Acquisition	317	0	0
SafeAuto
Deferred policy acquisition costs activity
Acquisition	$ 7	$ 0	$ 0