XML 109 R90.htm IDEA: XBRL DOCUMENT
v3.19.1

Investments - Unrealized loss and Limited partnerships (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Other details of unrealized loss |  |
Unrealized losses related to securities with unrealized loss position less than 20% of cost or amortized cost | $ 902 |
Unrealized losses related to securities with unrealized loss position greater than or equal to 20% of cost or amortized cost | 55 |
Limited partnership interests | 7,505 | $ 6,740
Fixed income and equity securities |  |
Other details of unrealized loss |  |
Available-for-sale securities, continuous unrealized loss position, accumulated loss | 957 | 295
Investment grade fixed income securities |  |
Other details of unrealized loss |  |
Unrealized losses related to securities with unrealized loss position less than 20% of cost or amortized cost | 673 |
Unrealized losses related to securities with unrealized loss position greater than or equal to 20% of cost or amortized cost | 18 |
Equity securities |  |
Other details of unrealized loss |  |
Available-for-sale securities, continuous unrealized loss position, accumulated loss |  | 12
Below investment grade fixed income securities |  |
Other details of unrealized loss |  |
Unrealized losses related to securities with unrealized loss position less than 20% of cost or amortized cost | 229 |
Available for sale securities, unrealized losses having loss of less than twenty percent, less than 12 months | 207 |
Unrealized losses related to securities with unrealized loss position greater than or equal to 20% of cost or amortized cost | 37 |
Unrealized losses related to securities with unrealized loss position greater than 20% of cost or amortized cost, unrealized loss position of 12 or more consecutive months | 3 |
EMA limited partnerships |  |
Other details of unrealized loss |  |
Limited partnership interests | 5,730 | 5,410
Cost-method limited partnership interests |  |
Other details of unrealized loss |  |
Limited partnership interests | $ 1,780 | $ 1,330

X
- Definition This item represents the excess of [amortized] cost over fair value of fixed income securities that have been in a loss position for twelve months or longer, and have unrealized loss position greater than 20% of cost or amortized cost for those securities which are categorized neither as held-to-maturity nor trading securities as of the balance sheet date. + References No definition available. + Details
Name: | all_AvailableForSaleSecuritiesUnrealizedLossesForFixedIncomeSecuritiesHeldForTwelveMonthsOrLongerPeriod
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of unrealized losses that are related to securities with an unrealized loss position less than 20% of cost or amortized cost. + References No definition available. + Details
Name: | all_AvailableForSaleSecuritiesUnrealizedLossesHavingLossOfLessThanTwentyPercent
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of unrealized losses that are related to securities with an unrealized loss position greater than 20% of cost or amortized cost. + References No definition available. + Details
Name: | all_AvailableForSaleSecuritiesUnrealizedLossesHavingLossOfTwentyPercentOrHigher
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale Securities, Unrealized Losses Having Loss of Less than Twenty Percent, Less than 12 Months + References No definition available. + Details
Name: | all_AvailableforsaleSecuritiesUnrealizedLossesHavingLossofLessthanTwentyPercentLessthan12Months
Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=all_InvestmentGradeFixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=all_BelowInvestmentGradeFixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquityMethodInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CostmethodInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |