Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Schedule of Unearned Premiums

The portion of premiums written applicable to the unexpired terms of the policies is recorded as unearned premiums.

Unearned premiums
	December 31,
($ in millions)	2024		2023
Allstate Protection	$	21,508	$	19,542
Protection Services	5,385		5,150
Total	$	26,893	$	24,692

Schedule of Rollforward of Credit Loss Allowance for Premium Installment Receivables and Allowance for Credit Loss

Rollforward of credit loss allowance for premium installment receivables
	For the years ended December 31,
($ in millions)	2024		2023
Beginning balance	$	(138)	$	(132)
Increase in the provision for credit losses	(414)		(348)
Write-off of uncollectible premium installment receivable amounts (1)	365		342
Ending balance	$	(187)	$	(138)

(1)Represents the portion of allowance that is reversed when premiums receivable are written off.

Allowance for credit losses
	As of December 31,
($ in millions)	2024		2023
Fixed income securities	$	17	$	36
Mortgage loans	12		11
Bank loans	10		22
Investments	39		69
Premium installment receivables	187		138
Reinsurance recoverables	63		65
Other assets	14		18
Assets	303		290
Commitments to fund mortgage loans and bank loans	—		1
Liabilities	—		1
Total	$	303	$	291

Rollforward of credit loss allowance for fixed income securities
	For the years ended December 31,
($ in millions)	2024		2023		2022
Beginning balance	$	(36)	$	(13)	$	(6)
Credit losses on securities for which credit losses not previously reported	(8)		(11)		(1)
Net decreases (increases) related to credit losses previously reported	2		(11)		(6)
Decrease (increase) related to sales and other	3		(1)		—
Write-offs	22		—		—
Ending balance	$	(17)	$	(36)	$	(13)
Components of credit loss allowance as of December 31
Corporate bonds	(16)		(35)		(11)
ABS	(1)		(1)		(2)
Total	$	(17)	$	(36)	$	(13)

Rollforward of credit loss allowance for mortgage loans
	For the years ended December 31,
($ in millions)	2024		2023		2022
Beginning balance	$	(11)	$	(7)	$	(6)
Net increases related to credit losses	(1)		(4)		(1)
Write-offs	—		—		—
Ending balance	$	(12)	$	(11)	$	(7)

Rollforward of credit loss allowance for bank loans
	For the years ended December 31,
($ in millions)	2024		2023		2022
Beginning balance	$	(22)	$	(57)	$	(61)
Net decreases (increases) related to credit losses	6		(18)		(26)
Reduction related to sales	—		50		30
Write-offs	6		3		—
Ending balance	$	(10)	$	(22)	$	(57)

Schedule of Goodwill by Reporting Unit

The Company’s goodwill reporting units are equivalent to its reportable segments to which goodwill has been assigned: Allstate Protection, Protection Services, and Allstate Health and Benefits.

Goodwill by reporting unit
	December 31,
($ in millions)	2024		2023
Allstate Protection	$	1,563	$	1,563
Protection Services	1,511		1,494
Allstate Health and Benefits	171		445
Total	$	3,245	$	3,502

Schedule of Intangible Assets by Type

Intangible assets are carried at cost less accumulated amortization.

Intangible assets by type
	December 31,
($ in millions)	2024		2023
Distribution and customer relationships	$	367	$	515
Trade names and licenses (1)	145		159
Technology and other	242		292
Total	$	754	$	966

(1)Includes finite-lived trade names with carrying values of $7 million and $21 million as of December 31, 2024 and 2023, respectively, and are expected to be fully amortized by the end of 2025.

Schedule of Amortization Expense of Intangible Assets

Amortization expense of intangible assets for the next five years and thereafter
($ in millions)
2025	$	230
2026	161
2027	112
2028	67
2029	32
Thereafter	14
Total amortization	$	616