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Reportable Segments (Details 2) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Property-Liability |  |  |  |
Net investment income | $ 843 | $ 748 | $ 2,488 | $ 2,241
Restructuring and related charges | (14) | (5) | (77) | (21)
Allstate Financial |  |  |  |
Life and annuity premiums and contract charges | 593 | 571 | 1,777 | 1,701
Corporate and Other |  |  |  |
Net income applicable to common shareholders | 637 | 491 | 1,853 | 950
Allstate Protection |  |  |  |
Property-Liability |  |  |  |
Underwriting income (loss) | 517 | 455 | 1,258 | 518
Discontinued Lines and Coverages |  |  |  |
Property-Liability |  |  |  |
Underwriting income (loss) | (88) | (100) | (95) | (104)
Property-Liability |  |  |  |
Property-Liability |  |  |  |
Underwriting income (loss) | 429 | 355 | 1,163 | 414
Net investment income | 372 | 310 | 1,074 | 928
Income tax (expense) benefit on operations | (252) | (218) | (703) | (429)
Realized capital gains and losses, after-tax | 54 | 36 | 199 | (10)
Allstate Financial |  |  |  |
Realized capital gains and losses, after-tax | 54 | 36 | 199 | (10)
Gain on disposition of operations, after-tax | 1 | 0 | 7 | 0
Corporate and Other |  |  |  |
Realized capital gains and losses, after-tax | 54 | 36 | 199 | (10)
Net income applicable to common shareholders | 604 | 483 | 1,740 | 903
Allstate Financial |  |  |  |
Property-Liability |  |  |  |
Net investment income | 461 | 427 | 1,383 | 1,281
Restructuring and related charges | (1) | 0 | (2) | (1)
Income tax (expense) benefit on operations | (79) | (43) | (206) | (147)
Realized capital gains and losses, after-tax | 13 | (14) | 9 | (46)
Allstate Financial |  |  |  |
Life and annuity premiums and contract charges | 593 | 571 | 1,777 | 1,701
Contract benefits and interest credited to contractholder funds | (629) | (667) | (1,935) | (1,939)
Operating costs and expenses and amortization of deferred policy acquisition costs | (188) | (194) | (597) | (577)
Operating income (loss) | 157 | 94 | 420 | 318
Realized capital gains and losses, after-tax | 13 | (14) | 9 | (46)
Valuation changes on embedded derivatives that are not hedged, after-tax | (1) | 0 | (2) | (8)
DAC and DSI amortization related to realized capital gains and losses and valuation changes on embedded derivatives that are not hedged, after-tax | (2) | (1) | (8) | (3)
Gain on disposition of operations, after-tax | 1 | 1 | 3 | 3
Corporate and Other |  |  |  |
Operating income (loss) | 157 | 94 | 420 | 318
Realized capital gains and losses, after-tax | 13 | (14) | 9 | (46)
Net income applicable to common shareholders | 168 | 80 | 422 | 264
Corporate and Other |  |  |  |
Property-Liability |  |  |  |
Net investment income | 10 | 11 | 31 | 32
Income tax (expense) benefit on operations | 60 | 26 | 121 | 77
Realized capital gains and losses, after-tax | 0 | 0 | 0 | (1)
Allstate Financial |  |  |  |
Operating income (loss) | (134) | (72) | (295) | (216)
Realized capital gains and losses, after-tax | 0 | 0 | 0 | (1)
Corporate and Other |  |  |  |
Operating costs and expenses | (175) | (80) | (360) | (238)
Preferred stock dividends | (29) | (29) | (87) | (87)
Operating income (loss) | (134) | (72) | (295) | (216)
Realized capital gains and losses, after-tax | 0 | 0 | 0 | (1)
Business combination expenses, after-tax | (1) | 0 | (14) | 0
Net income applicable to common shareholders | $ (135) | $ (72) | $ (309) | $ (217)

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- Definition Premiums recognized as revenue in the period on all life insurance and reinsurance contracts, as well as accident and health insurance and reinsurance contracts, after subtracting any amounts ceded to another insurer. 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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- Definition A measure that is not based on GAAP, which is calculated as premiums earned, less claims and claims expense ("losses"), amortization of deferred policy acquisition costs ("DAC"), operating costs and expenses and restructuring and related charges, as determined using GAAP. + References No definition available. + Details
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