Segment Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
|
Segment Reporting Information [Line Items] | |||||
Revenues | $ 1,104 | $ 1,020 | $ 2,207 | $ 2,006 | |
Net Investment Income | 131 | 132 | 259 | 263 | |
Realized gains on investments | 14 | 6 | 55 | 19 | |
Income (loss) before income taxes | 148 | 29 | 365 | 141 | |
Identifiable assets | 17,034 | 17,034 | 16,548 | ||
Property Casualty Insurance Segment
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Segment Reporting Information [Line Items] | |||||
Identifiable assets | 2,489 | 2,489 | 2,395 | ||
Commercial Lines
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 646 | 591 | 1,277 | 1,160 | |
Income (loss) before income taxes | 34 | (20) | 92 | 14 | |
Commercial Lines | Commercial Casualty Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 211 | 191 | 415 | 372 | |
Commercial Lines | Commercial Property Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 152 | 134 | 299 | 265 | |
Commercial Lines | Commercial Auto Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 117 | 106 | 231 | 207 | |
Commercial Lines | Workers' Compensation
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 87 | 85 | 175 | 166 | |
Commercial Lines | Specialty Packages
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 37 | 37 | 76 | 75 | |
Commercial Lines | Surety and Executive Risk
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 30 | 27 | 59 | 54 | |
Commercial Lines | Machinery and Equipment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 11 | 10 | 21 | 19 | |
Commercial Lines | Commercial Lines Insurance Premiums
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 645 | 590 | 1,276 | 1,158 | |
Commercial Lines | Other Fee Revenue
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 1 | 1 | 1 | 2 | |
Personal Lines
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 238 | 215 | 469 | 424 | |
Income (loss) before income taxes | (1) | (55) | 19 | (77) | |
Personal Lines | Personal Auto
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 109 | 100 | 216 | 198 | |
Personal Lines | Home Owner Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 99 | 87 | 195 | 171 | |
Personal Lines | Other Personal Lines
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 29 | 27 | 57 | 54 | |
Personal Lines | Commercial Lines Insurance Premiums
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 237 | 214 | 468 | 423 | |
Personal Lines | Other Fee Revenue
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 1 | 1 | 1 | 1 | |
Excess And Surplus Lines Insurance
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 28 | 22 | 55 | 43 | |
Income (loss) before income taxes | 1 | (2) | 1 | (5) | |
Life Insurance Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 45 | 51 | 88 | 92 | |
Income (loss) before income taxes | 3 | 2 | 10 | (1) | |
Identifiable assets | 1,254 | 1,254 | 1,201 | ||
Life Insurance Segment | Life Insurance Excluding Account Investment Fees
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 44 | 51 | 86 | 92 | |
Life Insurance Segment | Seperate Account Investment Management Fees
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 1 | 0 | 2 | 0 | |
Investments Segment
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 145 | 138 | 314 | 282 | |
Income (loss) before income taxes | 127 | 118 | 275 | 241 | |
Identifiable assets | 12,983 | 12,983 | 12,599 | ||
Investments Segment | Investment Income, Net
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 131 | 132 | |||
Net Investment Income | 263 | ||||
Investments Segment | Realized Investment Gains, Net
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 14 | 6 | 19 | ||
Other
|
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Segment Reporting Information [Line Items] | |||||
Revenues | 2 | 3 | 4 | 5 | |
Income (loss) before income taxes | (16) | (14) | (32) | (31) | |
Identifiable assets | $ 308 | $ 308 | $ 353 |