Income Taxes - Components of the deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets
Unearned premium reserves	$ 659	$ 642
Pension	161	197
Accrued compensation	139	147
Discount on loss reserves	79	78
Other postretirement benefits	36	49
Net operating loss carryover	23	26
Other assets	68	54
Total deferred tax assets	1,165	1,193
Deferred tax liabilities
DAC	(858)	(847)
Unrealized net capital gains	(856)	(507)
Investments	(394)	(567)
Life and annuity reserves	(216)	(222)
Intangible assets	(87)	(98)
Other liabilities	(109)	(106)
Total deferred tax liabilities	(2,520)	(2,347)
Net deferred tax liability	$ (1,355)	$ (1,154)

Deferred Tax Liabilities, Difference in Tax Bases of Invested Assets

No definition available.

Name:	all_DeferredTaxLiabilitiesDifferenceinTaxBasesofInvestedAssets
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax liabilities arising from estimated policyholder reserves, which will be deductible from future taxable income when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the tax deduction to be taken.

+ References

No definition available.