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Schedule II - Condensed Financial Information of Registrant - Narrative (Details) - USD ($) |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 17, 2018 | Dec. 20, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 18, 2018 | Oct. 11, 2018 | Dec. 11, 2017
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Interest paid on debt |  |  | $ 330,000,000 | $ 332,000,000 | $ 287,000,000 |  |  |
Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  | 1,250,000,000 | 250,000,000 |  |  |  |
Repayment of notes due to subsidiaries |  |  | 250,000,000 | 50,000,000 | 0 |  |  |
Interest paid on debt |  |  | $ 330,000,000 | $ 331,000,000 | $ 287,000,000 |  |  |
Kennett Capital Inc | Subsidiaries | Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  |  |  |  | $ 1,000,000,000 | $ 250,000,000 |
Note stated interest rate (as a percent) |  |  |  |  |  | 3.03% | 2.49% |
Kennett Capital Inc | Notes Due 2018 at 1.59 Percent, Note One | Subsidiaries | Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  |  |  |  |  |  | $ 125,000,000
Note stated interest rate (as a percent) |  |  |  |  |  |  |  | 1.59%
Repayments of debt | $ 125,000,000 |  |  |  |  |  |  |
Allstate Non-Insurance Holdings Inc | Notes Due 2018 at 1.59 Percent, Note Two | Subsidiaries | Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  |  |  |  |  |  | $ 175,000,000
Repayment of notes due to subsidiaries |  | $ 50,000,000 |  |  |  |  |  |
Repayments of debt | $ 125,000,000 |  |  |  |  |  |  |

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