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v3.20.4

Investments - Principal geographic distribution of municipal bonds (Details) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Texas |  |
Municipal Bonds |  |
Percentage of municipal bonds carrying value | 11.00% | 12.70%
California |  |
Municipal Bonds |  |
Percentage of municipal bonds carrying value | 12.80% | 8.60%
Colorado |  |
Municipal Bonds |  |
Percentage of municipal bonds carrying value | 4.80% | 5.80%
Washington |  |
Municipal Bonds |  |
Percentage of municipal bonds carrying value | 4.00% | 5.50%
New York |  |
Municipal Bonds |  |
Percentage of municipal bonds carrying value | 5.30% | 3.70%

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- References No definition available. + Details
Name: | all_MunicipalBondsLineItems
Namespace Prefix: | all_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the amount of municipal bonds as a percentage of total carrying value. + References No definition available. + Details
Name: | all_MunicipalBondsPortfolioCarryingValuePercentage
Namespace Prefix: | all_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=stpr_CO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=stpr_WA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=stpr_NY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |