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Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | $ 4,191 | $ 3,954 | $ 3,861
Reserves for claims and claims expense, contract benefits and contractholder funds | 58,308 | 57,749 | 57,411
Unearned premiums | 13,473 | 12,583 | 12,202
Premium revenue and contract charges | 34,678 | 33,582 | 32,467
Net investment income | 3,401 | 3,042 | 3,156
Claims and claims expense, contract benefits and interest credited to contractholders | 24,542 | 24,804 | 23,598
Amortization of deferred policy acquisition costs | 4,784 | 4,550 | 4,364
Other operating costs and expenses | 5,227 | 4,431 | 4,412
Premiums written (excluding life) | 33,661 | 32,455 | 31,648
Intersegment Eliminations (2) |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 0 | 0 | 0
Reserves for claims and claims expense, contract benefits and contractholder funds | 0 | 0 | 0
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | (110) | (105) | (42)
Net investment income | 0 | 0 | 0
Claims and claims expense, contract benefits and interest credited to contractholders | (6) | (5) | (14)
Amortization of deferred policy acquisition costs | 0 | 0 | 0
Other operating costs and expenses | (104) | (100) | (28)
Premiums written (excluding life) | 0 | 0 | 0
Allstate Protection | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,510 | 1,432 | 1,410
Reserves for claims and claims expense, contract benefits and contractholder funds | 24,336 | 23,263 | 21,777
Unearned premiums | 11,409 | 11,160 | 10,979
Premium revenue and contract charges | 31,433 | 30,727 | 29,748
Claims and claims expense, contract benefits and interest credited to contractholders | 21,470 | 21,863 | 20,718
Amortization of deferred policy acquisition costs | 4,205 | 4,053 | 3,933
Other operating costs and expenses | 3,647 | 3,484 | 3,476
Premiums written (excluding life) | 31,648 | 30,888 | 30,115
Discontinued Lines and Coverages | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 0 | 0 | 0
Reserves for claims and claims expense, contract benefits and contractholder funds | 1,893 | 1,953 | 2,062
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | 0 | 0 | 0
Claims and claims expense, contract benefits and interest credited to contractholders | 96 | 105 | 53
Amortization of deferred policy acquisition costs | 0 | 0 | 0
Other operating costs and expenses | 3 | 2 | 2
Premiums written (excluding life) | 0 | 3 | 0
Property-Liability | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,510 | 1,432 | 1,410
Reserves for claims and claims expense, contract benefits and contractholder funds | 26,229 | 25,216 | 23,839
Unearned premiums | 11,409 | 11,160 | 10,979
Premium revenue and contract charges | 31,433 | 30,727 | 29,748
Net investment income | 1,478 | 1,253 | 1,226
Claims and claims expense, contract benefits and interest credited to contractholders | 21,566 | 21,968 | 20,771
Amortization of deferred policy acquisition costs | 4,205 | 4,053 | 3,933
Other operating costs and expenses | 3,650 | 3,486 | 3,478
Premiums written (excluding life) | 31,648 | 30,891 | 30,115
Service Businesses | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 954 | 756 | 619
Reserves for claims and claims expense, contract benefits and contractholder funds | 96 | 34 | 30
Unearned premiums | 2,052 | 1,411 | 1,210
Premium revenue and contract charges | 977 | 685 | 603
Net investment income | 16 | 13 | 11
Claims and claims expense, contract benefits and interest credited to contractholders | 369 | 258 | 277
Amortization of deferred policy acquisition costs | 296 | 214 | 169
Other operating costs and expenses | 506 | 223 | 164
Premiums written (excluding life) | 1,094 | 709 | 756
Allstate Life | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,152 | 1,200 | 1,271
Reserves for claims and claims expense, contract benefits and contractholder funds | 10,244 | 10,042 | 9,895
Unearned premiums | 4 | 4 | 4
Premium revenue and contract charges | 1,280 | 1,250 | 1,223
Net investment income | 489 | 482 | 490
Claims and claims expense, contract benefits and interest credited to contractholders | 1,047 | 1,027 | 1,031
Amortization of deferred policy acquisition costs | 134 | 131 | 133
Other operating costs and expenses | 240 | 226 | 213
Premiums written (excluding life) | 0 | 0 | 0
Allstate Benefits | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 541 | 526 | 514
Reserves for claims and claims expense, contract benefits and contractholder funds | 1,869 | 1,821 | 1,760
Unearned premiums | 8 | 8 | 9
Premium revenue and contract charges | 1,084 | 1,011 | 921
Net investment income | 72 | 71 | 71
Claims and claims expense, contract benefits and interest credited to contractholders | 599 | 545 | 488
Amortization of deferred policy acquisition costs | 142 | 145 | 124
Other operating costs and expenses | 269 | 240 | 222
Premiums written (excluding life) | 919 | 855 | 777
Allstate Annuities | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 34 | 40 | 47
Reserves for claims and claims expense, contract benefits and contractholder funds | 19,870 | 20,636 | 21,887
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | 14 | 14 | 14
Net investment income | 1,305 | 1,181 | 1,323
Claims and claims expense, contract benefits and interest credited to contractholders | 967 | 1,011 | 1,045
Amortization of deferred policy acquisition costs | 7 | 7 | 5
Other operating costs and expenses | 35 | 32 | 37
Premiums written (excluding life) | 0 | 0 | 0
Corporate and Other | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 0 | 0 | 0
Reserves for claims and claims expense, contract benefits and contractholder funds | 0 | 0 | 0
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | 0 | 0 | 0
Net investment income | 41 | 42 | 35
Claims and claims expense, contract benefits and interest credited to contractholders | 0 | 0 | 0
Amortization of deferred policy acquisition costs | 0 | 0 | 0
Other operating costs and expenses | 631 | 324 | 326
Premiums written (excluding life) | $ 0 | $ 0 | $ 0

X
- Definition Amount of insurance benefits, claims, losses and settlement expenses incurred, plus interest allocated to policyholders holding contracts under which the insurer must provide a guaranteed yield. + References No definition available. + Details
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- Definition Amount of reserves for future policy claims payable and loss expenses to be incurred, and the liability as of the balance sheet date to the policyholders for deposits held under the terms of insurance contracts. + References No definition available. + Details
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- Definition Amount of premium revenue earned. Also includes an amount that an insurer adds to a policy's premium, or deducts from a policy's cash value or contract holder's account, as compensation for services rendered (may include fees), after subtracting any amounts ceded to another insurer. + References No definition available. + Details
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