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Schedule II - Condensed Financial Information of Registrant - Narrative (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 18, 2019 | Apr. 11, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 19, 2019 | Dec. 18, 2018 | Oct. 11, 2018
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Interest paid on debt |  |  | $ 312 | $ 330 | $ 332 |  |  |
Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  | 1,000 | 1,250 |  |  |  |
Repayment of notes due to subsidiaries |  |  | 1,250 | 250 | 50 |  |  |
Interest paid on debt |  |  | $ 312 | $ 330 | $ 331 |  |  |
Kennett Capital Inc | Subsidiaries | Allstate Corporation |  |  |  |  |  |  |  |
Condensed Financial Information of Registrant |  |  |  |  |  |  |  |
Notes due to subsidiaries |  |  |  |  |  | $ 1,000 | $ 1,000 | $ 250
Note stated interest rate (as a percent) |  |  |  |  |  | 2.63% | 3.03% | 2.49%
Repayment of notes due to subsidiaries | $ 1,000 | $ 250 |  |  |  |  |  |

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