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Reporting Segments - Total assets and investments (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Segment Reporting Information |  |
Assets | $ 112,249 | $ 112,422
Investments | 81,260 | 82,803
Property-Liability |  |
Segment Reporting Information |  |
Assets | 61,947 | 60,197
Investments | 43,634 | 43,183
Allstate Financial |  |
Segment Reporting Information |  |
Assets | 26,798 | 28,836
Investments | 22,336 | 23,722
Service Businesses |  |
Segment Reporting Information |  |
Assets | 5,473 | 4,531
Investments | 1,203 | 954
Allstate Life |  |
Segment Reporting Information |  |
Assets | 13,613 | 14,107
Investments | 10,809 | 11,210
Allstate Benefits |  |
Segment Reporting Information |  |
Assets | 2,822 | 2,766
Investments | 1,809 | 1,776
Corporate and Other |  |
Segment Reporting Information |  |
Assets | 1,596 | 1,985
Investments | $ 1,469 | $ 1,958

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