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Note 15 - Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | Fiscal Quarter |
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | (In millions, except for per share data) |
Year Ended December 31, 2020: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue (less agency commissions) |  | $ | 534 |  |  | $ | 451 |  |  | $ | 604 |  |  | $ | 792 |
Operating income |  |  | 124 |  |  |  | 65 |  |  |  | 212 |  |  |  | 351 |
Net income (loss) attributable to common stockholders |  |  | 40 |  |  |  | (2 | ) |  |  | 109 |  |  |  | 211 |
Basic net income (loss) attributable to common stockholders per share |  | $ | 0.41 |  |  | $ | (0.02 | ) |  | $ | 1.15 |  |  | $ | 2.24 |
Diluted net income (loss) attributable to common stockholders per share |  | $ | 0.40 |  |  | $ | (0.02 | ) |  | $ | 1.14 |  |  | $ | 2.22 |
Year Ended December 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue (less agency commissions) |  | $ | 518 |  |  | $ | 508 |  |  | $ | 517 |  |  | $ | 579 |
Operating income |  |  | 40 |  |  |  | 119 |  |  |  | 139 |  |  |  | 180 |
Net (loss) income attributable to common stockholders |  |  | (31 | ) |  |  | 31 |  |  |  | 46 |  |  |  | 81 |
Basic net (loss) income attributable to common stockholders per share |  | $ | (0.31 | ) |  | $ | 0.31 |  |  | $ | 0.46 |  |  | $ | 0.82 |
Diluted net (loss) income attributable to common stockholders per share |  | $ | (0.31 | ) |  | $ | 0.31 |  |  | $ | 0.46 |  |  | $ | 0.81 |

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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=121640914&loc=d3e1280-108306 + Details
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