|                                                                                                                                                                                                                          |   | Three Months Ended |       |   | Six Months Ended |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------|------------|--------|------------------|--------|
|                                                                                                                                                                                                                          |   | June 30,           |       |   | June 30,         |   |
| (in millions, except per share amounts)                                                                                                                                                                                       |   | 2009               |       |   | 2008             |   |   | 2009 |   |   | 2008 |   |
| Income Available for Common Shareholders                                                                                                                                                                                      |   | $                  | 388        |   |             | $      | 293 |   |   | $ | 629 |   |   | $ | 517 |   |
| Less: distributed earnings to common shareholders                                                                                                                                                                             |   |               | 155   |   |             |   | 139  |   |   |   | 309  |   |   |   | 278  |   |
| Undistributed earnings                                                                                                                                                                                                        |   | $                  | 233        |   |             | $      | 154 |   |   | $ | 320 |   |   | $ | 239 |   |
| Common shareholders earnings                                                                                                                                                                                                  |   |               |       |   |             |   |   |   |   |   |   |   |   |   |   |   |
| Basic                                                                                                                                                                                                                         |   |               |       |   |             |   |   |   |   |   |   |   |   |   |   |   |
| Distributed earnings to common shareholders                                                                                                                                                                                   |   | $                  | 155        |   |             | $      | 139 |   |   | $ | 309 |   |   | $ | 278 |   |
| Undistributed earnings allocated to common shareholders                                                                                                                                                                       |   |               | 223   |   |             |   | 146  |   |   |   | 306  |   |   |   | 227  |   |
| Total common shareholders earnings, basic                                                                                                                                                                                     |   | $                  | 378        |   |             | $      | 285 |   |   | $ | 615 |   |   | $ | 505 |   |
| Diluted                                                                                                                                                                                                                       |   |               |       |   |             |   |   |   |   |   |   |   |   |   |   |   |
| Distributed earnings to common shareholders                                                                                                                                                                                   |   | $                  | 155        |   |             | $      | 139 |   |   | $ | 309 |   |   | $ | 278 |   |
| Undistributed earnings allocated to common shareholders                                                                                                                                                                       |   |               | 223   |   |             |   | 146  |   |   |   | 306  |   |   |   | 227  |   |
| Total common shareholders earnings, diluted                                                                                                                                                                                   |   | $                  | 378        |   |             | $      | 285 |   |   | $ | 615 |   |   | $ | 505 |   |
| Weighted average common shares outstanding, basic                                                                                                                                                                             |   |               | 368        |   |             |   | 356 |   |   |   | 366 |   |   |   | 355 |   |
| 9.50% Convertible Subordinated Notes                                                                                                                                                                                          |   |               | 17    |   |             |   | 19  |   |   |   | 17  |   |   |   | 19  |   |
| Weighted average common shares outstanding and participating securities, basic                                                                                                                                                |   |               | 385   |   |             |   | 375  |   |   |   | 383  |   |   |   | 374  |   |
| Weighted average common shares outstanding, basic                                                                                                                                                                             |   |               | 368        |   |             |   | 356 |   |   |   | 366 |   |   |   | 355 |   |
| Employee share-based compensation                                                                                                                                                                                             |   |               | 1     |   |             |   | 1  |   |   |   | 1  |   |   |   | 1  |   |
| Weighted average common shares outstanding, diluted                                                                                                                                                                           |   |               | 369        |   |             |   | 357 |   |   |   | 367 |   |   |   | 356 |   |
| 9.50% Convertible Subordinated Notes                                                                                                                                                                                          |   |               | 17    |   |             |   | 19  |   |   |   | 17  |   |   |   | 19  |   |
| Weighted average common shares outstanding and participating securities, diluted                                                                                                                                              |   |               | 386   |   |             |   | 376  |   |   |   | 384  |   |   |   | 375  |   |
| Net earnings per common share, basic                                                                                                                                                                                          |   |               |       |   |             |   |   |   |   |   |   |   |   |   |   |   |
| Distributed earnings, basic (1)                                                                                                                                                                                               |   | $                  | 0.42       |   |             | $      | 0.39 |   |   | $ | 0.84 |   |   | $ | 0.78 |   |
| Undistributed earnings, basic                                                                                                                                                                                                 |   |               | 0.61  |   |             |   | 0.41  |   |   |   | 0.84  |   |   |   | 0.64  |   |
| Total                                                                                                                                                                                                                         |   | $                  | 1.03       |   |             | $      | 0.80 |   |   | $ | 1.68 |   |   | $ | 1.42 |   |
| Net earnings per common share, diluted                                                                                                                                                                                        |   |               |       |   |             |   |   |   |   |   |   |   |   |   |   |   |
| Distributed earnings, diluted                                                                                                                                                                                                 |   | $                  | 0.42       |   |             | $      | 0.39 |   |   | $ | 0.84 |   |   | $ | 0.78 |   |
| Undistributed earnings, diluted                                                                                                                                                                                               |   |               | 0.60  |   |             |   | 0.41  |   |   |   | 0.83  |   |   |   | 0.64  |   |
| Total                                                                                                                                                                                                                         |   | $                  | 1.02       |   |             | $      | 0.80 |   |   | $ | 1.67 |   |   | $ | 1.42 |   |
|                                                                                                                                                                                                                          |   |
| (1) Distributed earnings, basic may differ from actual per share amounts paid as dividends, as the EPS computation under GAAP requires the use of the weighted average, rather than the actual, number of shares outstanding. |   |