XML 45 R30.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Reinsurance (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Reinsurance Disclosures [Abstract] |
Schedule of reductions to premiums and contract charges due to reinsurance premium ceded amounts | Property-liability insurance premiums earned and life and annuity premiums and contract charges have been reduced by reinsurance ceded amounts shown in the following table.
($ in millions) | Three months ended September 30, |  | Nine months ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Property-liability insurance premiums earned | $ | 245 |  |  | $ | 244 |  |  | $ | 745 |  |  | $ | 741 |
Life and annuity premiums and contract charges | 75 |  |  | 78 |  |  | 225 |  |  | 230
Schedule of reductions to costs and expenses due to reinsurance ceded amounts | Property-liability insurance claims and claims expense, life and annuity contract benefits and interest credited to contractholder funds have been reduced by the reinsurance ceded amounts shown in the following table.
($ in millions) | Three months ended September 30, |  | Nine months ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Property-liability insurance claims and claims expense (1) | $ | 1,268 |  |  | $ | 493 |  |  | $ | 1,523 |  |  | $ | 895 |
Life and annuity contract benefits | 47 |  |  | 25 |  |  | 164 |  |  | 172
Interest credited to contractholder funds | 6 |  |  | 7 |  |  | 17 |  |  | 18
_______________
(1) | Includes expected reinsurance recoveries on catastrophe losses related to homeowners flood claims covered by the National Flood Insurance Program.

X
- Definition This element may be used as a single block of text to encapsulate entire disclosure, including data and tables for reinsurance claims and benefits ceded. + References No definition available. + Details
Name: | all_ScheduleOfReinsuranceClaimsBenefitsCededTableTextBlock
Namespace Prefix: | all_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element may be used as a single block of text to encapsulate entire disclosure, including data and tables for reinsurance premium ceded. + References No definition available. + Details
Name: | all_ScheduleOfReinsurancePremiumCededTableTextBlock
Namespace Prefix: | all_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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