Income Taxes - Components of the deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Unearned premium reserves	$ 642	$ 594
Pension	197	192
Accrued compensation	147	145
Discount on loss reserves	78	67
Other postretirement benefits	49	45
Net operating loss carryover	26	50
Other assets	54	57
Total deferred tax assets	1,193	1,150
Deferred tax liabilities
DAC	(847)	(854)
Unrealized net capital gains	(507)	(2)
Investments	(567)	(278)
Life and annuity reserves	(222)	(194)
Intangible assets	(98)	(145)
Other liabilities	(106)	(102)
Total deferred tax liabilities	(2,347)	(1,575)
Net deferred tax liability	$ (1,154)	$ (425)

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.