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Quarterly Results of Operations (Tables) | 12 Months Ended
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Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information [Table Text Block] | QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)
Years Ended December 31, |  |  |  |  |  |  |  |
(in millions, except per share data) |  | Three Months Ended
2021 |  | March 31, |  | June 30, |  | September 30, |  | December 31,
Total Revenues |  | $ | 4,119 |  |  | $ | 4,137 |  |  | $ | 4,043 |  |  | $ | 4,359 |
Total benefits and expenses |  | 3,933 |  |  | 3,655 |  |  | 4,077 |  |  | 4,302 |
Income before income taxes |  | 186 |  |  | 482 |  |  | (34) |  |  | 57 |
Net Income |  | 139 |  |  | 344 |  |  | (22) |  |  | 156 |
Earnings Per Share: |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 2.04 |  |  | $ | 5.06 |  |  | $ | (0.32) |  |  | $ | 2.32 |
Diluted earnings per share |  | 2.03 |  |  | 5.02 |  |  | (0.32) |  |  | 2.30 |
2020 |  | March 31, |  | June 30, |  | September 30, |  | December 31,
Total Revenues |  | $ | 3,204 |  |  | $ | 3,606 |  |  | $ | 3,643 |  |  | $ | 4,143 |
Total benefits and expenses |  | 3,300 |  |  | 3,411 |  |  | 3,358 |  |  | 3,974 |
Income before income taxes |  | (96) |  |  | 195 |  |  | 285 |  |  | 169 |
Net Income |  | (88) |  |  | 158 |  |  | 213 |  |  | 132 |
Earnings Per Share: |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | (1.41) |  |  | $ | 2.49 |  |  | $ | 3.13 |  |  | $ | 1.95 |
Diluted earnings per share |  | (1.41) |  |  | 2.48 |  |  | 3.12 |  |  | 1.94 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124502072&loc=d3e1280-108306 + Details
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