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Reportable Segments - Financial performance (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information |  |  |  |
Net investment income | $ 880,000,000 | $ 844,000,000 | $ 2,470,000,000 | $ 2,454,000,000
Net income applicable to common shareholders | 889,000,000 | 942,000,000 | 2,971,000,000 | 2,597,000,000
Allstate Protection |  |  |  |
Segment Reporting Information |  |  |  |
Underwriting income (loss) | 836,000,000 | 587,000,000 | 1,909,000,000 | 2,053,000,000
Discontinued Lines and Coverages |  |  |  |
Segment Reporting Information |  |  |  |
Underwriting income (loss) | (99,000,000) | (80,000,000) | (105,000,000) | (86,000,000)
Property-Liability |  |  |  |
Segment Reporting Information |  |  |  |
Underwriting income (loss) | 737,000,000 | 507,000,000 | 1,804,000,000 | 1,967,000,000
Net investment income | 448,000,000 | 410,000,000 | 1,210,000,000 | 1,100,000,000
Income tax expense on operations | (236,000,000) | (185,000,000) | (617,000,000) | (628,000,000)
Realized capital gains and losses, after-tax | 127,000,000 | 103,000,000 | 724,000,000 | 16,000,000
Tax Legislation expense (benefit) | 0 | (3,000,000) | 0 | (3,000,000)
Net income applicable to common shareholders | 1,076,000,000 | 832,000,000 | 3,121,000,000 | 2,452,000,000
Service Businesses |  |  |  |
Segment Reporting Information |  |  |  |
Adjusted net income | 8,000,000 | 1,000,000 | 35,000,000 | 0
Realized capital gains and losses, after-tax | 4,000,000 | (1,000,000) | 17,000,000 | (5,000,000)
Amortization of purchased intangibles, after-tax | (25,000,000) | (16,000,000) | (74,000,000) | (48,000,000)
Impairment of purchased intangibles, after-tax | 0 |  | (43,000,000) | 0
Tax Legislation expense (benefit) | 0 | (4,000,000) | 0 | (4,000,000)
Net income applicable to common shareholders | (13,000,000) | (20,000,000) | (65,000,000) | (57,000,000)
Allstate Life |  |  |  |
Segment Reporting Information |  |  |  |
Adjusted net income | 44,000,000 | 75,000,000 | 185,000,000 | 226,000,000
Realized capital gains and losses, after-tax | 4,000,000 | (3,000,000) | 0 | (7,000,000)
Valuation changes on embedded derivatives not hedged, after-tax | (9,000,000) | 0 | (9,000,000) |
DAC and DSI amortization related to realized capital gains and losses, after-tax | 1,000,000 | (1,000,000) | (2,000,000) | (6,000,000)
Tax Legislation expense (benefit) | 0 | (16,000,000) | 0 | (16,000,000)
Net income applicable to common shareholders | 40,000,000 | 55,000,000 | 174,000,000 | 197,000,000
Allstate Benefits |  |  |  |
Segment Reporting Information |  |  |  |
Adjusted net income | 31,000,000 | 33,000,000 | 99,000,000 | 98,000,000
Realized capital gains and losses, after-tax | 2,000,000 | 2,000,000 | 7,000,000 | 0
Net income applicable to common shareholders | 33,000,000 | 35,000,000 | 106,000,000 | 98,000,000
Allstate Annuities |  |  |  |
Segment Reporting Information |  |  |  |
Adjusted net income | 16,000,000 | 20,000,000 | 43,000,000 | 99,000,000
Realized capital gains and losses, after-tax | 16,000,000 | 40,000,000 | 177,000,000 | 22,000,000
Valuation changes on embedded derivatives not hedged, after-tax | (1,000,000) | 1,000,000 | (6,000,000) | 5,000,000
Gain on disposition of operations, after-tax | 0 | 1,000,000 | 2,000,000 | 3,000,000
Tax Legislation expense (benefit) | 0 | 69,000,000 | 0 | 69,000,000
Net income applicable to common shareholders | 31,000,000 | 131,000,000 | 216,000,000 | 198,000,000
Corporate and Other |  |  |  |
Segment Reporting Information |  |  |  |
Adjusted net income | (101,000,000) | (106,000,000) | (302,000,000) | (291,000,000)
Realized capital gains and losses, after-tax | 2,000,000 | 0 | 10,000,000 | (10,000,000)
Pension and other postretirement remeasurement gains and losses, after-tax | (179,000,000) | 30,000,000 | (289,000,000) | 25,000,000
Tax Legislation expense (benefit) | 0 | (15,000,000) | 0 | (15,000,000)
Net income applicable to common shareholders | $ (278,000,000) | $ (91,000,000) | $ (581,000,000) | $ (291,000,000)

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