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Segments of Operations - Revenues by segment and sub-segment (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | $ 1,209 |  | $ 1,173
Net investment income | 544 | [1] | 542
Other income | 57 |  | 56
Revenues before realized gains (losses) | 1,826 |  | 1,840
Realized gains (losses) on securities | (551) |  | 184
Total revenues | 1,275 |  | 2,024
Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | 1,209 |  | 1,173
Net investment income | 93 | [2] | 104
Other income | 5 |  | 3
Revenues before realized gains (losses) | 1,307 |  | 1,280
Annuity |  |  |
Segment Reporting Information [Line Items] |  |  |
Net investment income | 422 |  | 435
Other income | 35 |  | 28
Revenues before realized gains (losses) | 457 |  | 463
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues before realized gains (losses) | 62 |  | 97
Specialty Property and transportation | Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | 386 |  | 361
Specialty casualty | Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | 556 |  | 629
Specialty financial | Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | 156 |  | 146
Other specialty | Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | 40 |  | 37
Other lines | Property and Casualty Insurance |  |  |
Segment Reporting Information [Line Items] |  |  |
Total premiums earned | $ 71 | [3] | $ 0
[1] | Net investment income in the first three months of 2020 includes a loss of $6 million on investments held by the companies that comprise the Neon exited lines due primarily to the $7 million loss recorded on equity securities that are carried at fair value through net investment income.
[2] | Includes a net loss of $6 million in the Neon exited lines, primarily from the change in fair value of equity securities.
[3] | Represents premiums earned in the Neon exited lines during the first three months of 2020. Neon’s $88 million in earned premiums during the first three months of 2019 are included in the Specialty casualty sub-segment.

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