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Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | $ 4,699 | $ 4,784 | $ 4,191
Reserves for claims and claims expense, contract benefits and contractholder funds | 57,704 | 58,002 | 58,308
Unearned premiums | 15,343 | 14,510 | 13,473
Premium revenue and contract charges | 38,577 | 36,513 | 34,678
Net investment income | 3,159 | 3,240 | 3,401
Claims and claims expense, contract benefits and interest credited to contractholders | 26,655 | 25,405 | 24,460
Amortization of deferred policy acquisition costs | 5,533 | 5,222 | 4,784
Other operating costs and expenses | 6,404 | 6,566 | 5,634
Premiums written (excluding life) | 37,942 | 35,966 | 33,661
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 | (154) | (122) | (110)
Net investment income | 0 | 0 | 0
Claims and claims expense, contract benefits and interest credited to contractholders | (9) | (7) | (6)
Amortization of deferred policy acquisition costs | 0 | 0 | 0
Other operating costs and expenses | (145) | (115) | (104)
Premiums written (excluding life) | 0 | 0 | 0
Allstate Protection | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,624 | 1,618 | 1,510
Reserves for claims and claims expense, contract benefits and contractholder funds | 25,843 | 25,495 | 24,336
Unearned premiums | 12,567 | 11,953 | 11,409
Premium revenue and contract charges | 34,843 | 32,950 | 31,433
Claims and claims expense, contract benefits and interest credited to contractholders | 23,517 | 22,348 | 21,388
Amortization of deferred policy acquisition costs | 4,649 | 4,475 | 4,205
Other operating costs and expenses | 4,506 | 4,522 | 4,239
Premiums written (excluding life) | 35,419 | 33,555 | 31,648
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 | 1,818 | 1,864 | 1,893
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | 0 | 0 | 0
Claims and claims expense, contract benefits and interest credited to contractholders | 105 | 87 | 96
Amortization of deferred policy acquisition costs | 0 | 0 | 0
Other operating costs and expenses | 3 | 3 | 3
Premiums written (excluding life) | 0 | 0 | 0
Property-Liability | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,624 | 1,618 | 1,510
Reserves for claims and claims expense, contract benefits and contractholder funds | 27,661 | 27,359 | 26,229
Unearned premiums | 12,567 | 11,953 | 11,409
Premium revenue and contract charges | 34,843 | 32,950 | 31,433
Net investment income | 1,533 | 1,464 | 1,478
Claims and claims expense, contract benefits and interest credited to contractholders | 23,622 | 22,435 | 21,484
Amortization of deferred policy acquisition costs | 4,649 | 4,475 | 4,205
Other operating costs and expenses | 4,509 | 4,525 | 4,242
Premiums written (excluding life) | 35,419 | 33,555 | 31,648
Service Businesses | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,449 | 1,290 | 954
Reserves for claims and claims expense, contract benefits and contractholder funds | 51 | 64 | 96
Unearned premiums | 2,765 | 2,546 | 2,052
Premium revenue and contract charges | 1,387 | 1,220 | 977
Net investment income | 42 | 27 | 16
Claims and claims expense, contract benefits and interest credited to contractholders | 363 | 350 | 369
Amortization of deferred policy acquisition costs | 543 | 463 | 296
Other operating costs and expenses | 838 | 603 | 565
Premiums written (excluding life) | 1,535 | 1,431 | 1,094
Allstate Life | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 1,079 | 1,300 | 1,152
Reserves for claims and claims expense, contract benefits and contractholder funds | 10,541 | 10,333 | 10,244
Unearned premiums | 3 | 3 | 4
Premium revenue and contract charges | 1,343 | 1,315 | 1,280
Net investment income | 514 | 505 | 489
Claims and claims expense, contract benefits and interest credited to contractholders | 1,154 | 1,094 | 1,047
Amortization of deferred policy acquisition costs | 173 | 132 | 134
Other operating costs and expenses | 356 | 364 | 344
Premiums written (excluding life) | 0 | 0 | 0
Allstate Benefits | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 527 | 549 | 541
Reserves for claims and claims expense, contract benefits and contractholder funds | 1,950 | 1,905 | 1,869
Unearned premiums | 8 | 8 | 8
Premium revenue and contract charges | 1,145 | 1,135 | 1,084
Net investment income | 83 | 77 | 72
Claims and claims expense, contract benefits and interest credited to contractholders | 635 | 630 | 599
Amortization of deferred policy acquisition costs | 161 | 145 | 142
Other operating costs and expenses | 285 | 278 | 261
Premiums written (excluding life) | 988 | 980 | 919
Allstate Annuities | Operating Segments |  |  |
Supplementary Insurance Information |  |  |
Deferred policy acquisition costs | 20 | 27 | 34
Reserves for claims and claims expense, contract benefits and contractholder funds | 17,501 | 18,341 | 19,870
Unearned premiums | 0 | 0 | 0
Premium revenue and contract charges | 13 | 15 | 14
Net investment income | 917 | 1,096 | 1,305
Claims and claims expense, contract benefits and interest credited to contractholders | 890 | 903 | 967
Amortization of deferred policy acquisition costs | 7 | 7 | 7
Other operating costs and expenses | 30 | 31 | 34
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 | 70 | 71 | 41
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 | 531 | 880 | 292
Premiums written (excluding life) | $ 0 | $ 0 | $ 0

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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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