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v3.23.1

Business Segments (Revenues by Line of Business) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Total revenues | $ 3,152 | $ 2,885 | [1]
Total operating revenues | 3,187 | 2,896 |
Net investment gains (losses) | (35) | (11) | [1]
Operating Segments | Specialty |  |  |
Total revenues | 1,333 | 1,258 |
Operating Segments | Commercial |  |  |
Total revenues | 1,202 | 1,030 |
Operating Segments | International |  |  |
Total revenues | 313 | 277 |
Operating Segments | Life & Group |  |  |
Total revenues | 329 | 331 |
Operating Segments | Corporate & Other |  |  |
Total revenues | 13 | 2 |
Eliminations |  |  |
Total revenues | (3) | (2) |
Management & Professional Liability | Operating Segments | Specialty |  |  |
Total revenues | 705 | 673 |
Surety | Operating Segments | Specialty |  |  |
Total revenues | 168 | 148 |
Warranty & Alternative Risks | Operating Segments | Specialty |  |  |
Total revenues | 460 | 437 |
Middle Market | Operating Segments | Commercial |  |  |
Total revenues | 398 | 362 |
Construction | Operating Segments | Commercial |  |  |
Total revenues | 385 | 324 |
Small Business | Operating Segments | Commercial |  |  |
Total revenues | 150 | 138 |
Other Commercial | Operating Segments | Commercial |  |  |
Total revenues | 269 | 206 |
Canada | Operating Segments | International |  |  |
Total revenues | 93 | 88 |
Europe | Operating Segments | International |  |  |
Total revenues | 127 | 120 |
Hardy | Operating Segments | International |  |  |
Total revenues | $ 93 | $ 69 |
[1] | As of January 1, 2023, the Company adopted ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12) using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.

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