Statutory Financial Information and Dividend Limitations - Allstates domestic insurance subsidiaries (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amount per statutory accounting practices
Net income (loss)	$ (1,583)	$ 7,713	$ 6,246
Capital and surplus	15,276	21,508
Life and annuity business sold | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Amount per statutory accounting practices
Net income (loss)	0	1,642	(81)
Capital and surplus	0	0
Property and casualty insurance
Amount per statutory accounting practices
Net income (loss)	(1,653)	5,975	6,232
Capital and surplus	14,997	21,186
Life, accident and health insurance
Amount per statutory accounting practices
Net income (loss)	70	96	$ 95
Capital and surplus	$ 279	$ 322