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Condensed Unaudited Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Condensed unaudited quarterly financial data | Condensed unaudited quarterly financial data
| Three Months Ended |
| March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
(in millions of U.S. dollars, except per share data) | 2019 |  |  | 2019 |  |  | 2019 |  |  | 2019 |
Net premiums earned | $ | 7,137 |  |  | $ | 7,891 |  |  | $ | 8,327 |  |  | $ | 7,935 |
Net investment income | 836 |  |  | 859 |  |  | 873 |  |  | 858 |
Net realized gains (losses) including OTTI losses | (97 | ) |  | (223 | ) |  | (155 | ) |  | (55 | )
Total revenues | $ | 7,876 |  |  | $ | 8,527 |  |  | $ | 9,045 |  |  | $ | 8,738 |
Losses and loss expenses | $ | 4,098 |  |  | $ | 4,715 |  |  | $ | 5,052 |  |  | $ | 4,865 |
Policy benefits | $ | 196 |  |  | $ | 161 |  |  | $ | 158 |  |  | $ | 225 |
Net income | $ | 1,040 |  |  | $ | 1,150 |  |  | $ | 1,091 |  |  | $ | 1,173 |
Basic earnings per share | $ | 2.27 |  |  | $ | 2.52 |  |  | $ | 2.40 |  |  | $ | 2.59 |
Diluted earnings per share | $ | 2.25 |  |  | $ | 2.50 |  |  | $ | 2.38 |  |  | $ | 2.57 |
| Three Months Ended |
| March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
(in millions of U.S. dollars, except per share data) | 2018 |  |  | 2018 |  |  | 2018 |  |  | 2018 |
Net premiums earned | $ | 7,027 |  |  | $ | 7,664 |  |  | $ | 7,908 |  |  | $ | 7,465 |
Net investment income | 806 |  |  | 828 |  |  | 823 |  |  | 848 |
Net realized gains (losses) including OTTI losses | (2 | ) |  | 18 |  |  | 19 |  |  | (687 | )
Total revenues | $ | 7,831 |  |  | $ | 8,510 |  |  | $ | 8,750 |  |  | $ | 7,626 |
Losses and loss expenses | $ | 4,102 |  |  | $ | 4,487 |  |  | $ | 4,868 |  |  | $ | 4,610 |
Policy benefits | $ | 151 |  |  | $ | 150 |  |  | $ | 127 |  |  | $ | 162 |
Net income | $ | 1,082 |  |  | $ | 1,294 |  |  | $ | 1,231 |  |  | $ | 355 |
Basic earnings per share | $ | 2.32 |  |  | $ | 2.78 |  |  | $ | 2.66 |  |  | $ | 0.77 |
Diluted earnings per share | $ | 2.30 |  |  | $ | 2.76 |  |  | $ | 2.64 |  |  | $ | 0.76 |
Net income for the three months ended December 31, 2018 included after-tax catastrophe losses of $506 million.

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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