SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended								12 Months Ended
	Jun. 20, 2013	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues
Investment income, less investment expense										$ 3,943	$ 4,010	$ 3,971
Realized capital gains and losses										594	327	503
Total revenues		8,792	8,465	8,787	8,463	8,547	8,128	8,278	8,362	34,507	33,315	32,654
Expenses
Interest expense										367	373	367
Loss on extinguishment of debt	480	11	11							491
Other operating expenses										4,387	4,118	3,739
Total costs and expenses										30,423	30,027	31,688
Income tax benefit										1,116	1,000	172
Net income										2,280	2,306	787
Preferred stock dividends										17
Net income available to common shareholders		810	310	434	709	394	723	423	766	2,263	2,306	787
Other comprehensive (loss) income, after-tax
Unrealized net capital gains and losses										(1,188)	1,434	452
Unrealized foreign currency translation adjustments										(32)	14	(12)
Unrecognized pension and other postretirement benefit cost										1,091	(302)	(239)
Other comprehensive (loss) income, after-tax										(129)	1,146	201
Comprehensive income										2,151	3,452	988
Allstate Corporation
Revenues
Investment income, less investment expense										3	6	16
Realized capital gains and losses												28
Other income										42	10	9
Total revenues										45	16	53
Expenses
Interest expense										366	372	365
Loss on extinguishment of debt										491
Pension and other postretirement benefit expense										(184)
Other operating expenses										30	22	63
Total costs and expenses										703	394	428
Loss from operations before income tax benefit and equity in net income of subsidiaries										(658)	(378)	(375)
Income tax benefit										(251)	(137)	(135)
Loss before equity in net income of subsidiaries										(407)	(241)	(240)
Equity in net income of subsidiaries										2,687	2,547	1,027
Net income										2,280	2,306	787
Preferred stock dividends										17
Net income available to common shareholders										2,263	2,306	787
Other comprehensive (loss) income, after-tax
Unrealized net capital gains and losses										(1,188)	1,434	452
Unrealized foreign currency translation adjustments										(32)	14	(12)
Unrecognized pension and other postretirement benefit cost										1,091	(302)	(239)
Other comprehensive (loss) income, after-tax										(129)	1,146	201
Comprehensive income										$ 2,151	$ 3,452	$ 988