Deferred Policy Acquisition Costs -Deferred policy acquisition costs activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred policy acquisition costs activity
Balance, beginning of year	$ 4,722	$ 3,774	$ 3,600
Acquisition costs deferred	7,337	6,874	5,651
Amortization charged to income	(6,644)	(6,252)	(5,477)
Effect of unrealized gains and losses	3	2	0
Balance, end of year	5,418	4,722	3,774
National General
Deferred policy acquisition costs activity
Acquisition	0	317	0
SafeAuto
Deferred policy acquisition costs activity
Acquisition	$ 0	$ 7	$ 0