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Reporting Segments - Impacts of Tax Legislation (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | $ 1,308 |  |
Tax Legislation expense (benefit) | (506) |  |
Total income tax expense | 802 | $ 877 | $ 1,111
Property-Liability |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | 1,253 |  |
Tax Legislation expense (benefit) | 65 |  |
Total income tax expense | 1,318 | 806 | 867
Service Businesses |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | (59) |  |
Tax Legislation expense (benefit) | (134) |  |
Total income tax expense | (193) | 0 | 2
Allstate Life |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | 108 |  |
Tax Legislation expense (benefit) | (332) |  |
Total income tax expense | (224) | 91 | 108
Allstate Benefits |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | 52 |  |
Tax Legislation expense (benefit) | (51) |  |
Total income tax expense | 1 | 51 | 55
Allstate Annuities |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | 124 |  |
Tax Legislation expense (benefit) | (182) |  |
Total income tax expense | (58) | 36 | 188
Corporate and Other |  |  |
Segment Reporting Information |  |  |
Income tax expense (benefit) before Tax Legislation | (170) |  |
Tax Legislation expense (benefit) | 128 |  |
Total income tax expense | $ (42) | $ (107) | $ (109)

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- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense + References No definition available. + Details
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