Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Other revenue	$ 669	$ 561
Net investment income	764	575
Net gains (losses) on investments and derivatives	(164)	14
Total revenues	15,259	13,786
Costs and expenses
Property and casualty insurance claims and claims expense	9,501	10,326
Accident, health and other policy benefits	296	265
Amortization of deferred policy acquisition costs	1,939	1,744
Operating costs and expenses	1,885	1,716
Pension and other postretirement remeasurement (gains) losses	(2)	(53)
Restructuring and related charges	10	27
Amortization of purchased intangibles	69	81
Interest expense	97	86
Total costs and expenses	13,795	14,192
Income (loss) from operations before income tax expense	1,464	(406)
Income tax expense (benefit)	266	(85)
Net income (loss)	1,198	(321)
Less: Net loss attributable to noncontrolling interest	(20)	(1)
Net income (loss) attributable to Allstate	1,218	(320)
Less: Preferred stock dividends	29	26
Net income (loss) applicable to common shareholders, basic	1,189	(346)
Net income (loss) applicable to common shareholders, diluted	$ 1,189	$ (346)
Earnings per common share:
Net income (loss) applicable to common shareholders per common share - Basic (in dollars per share)	$ 4.51	$ (1.31)
Weighted average common shares - Basic (in shares)	263.5	263.5
Net income (loss) applicable to common shareholders per common share - Diluted (in dollars per share)	$ 4.46	$ (1.31)
Weighted average common shares - Diluted (in shares)	266.5	263.5
Property and casualty insurance premiums
Revenues
Insurance premiums and contract charges	$ 13,512	$ 12,173
Accident and health insurance premiums and contract charges
Revenues
Insurance premiums and contract charges	$ 478	$ 463