|                                                                                                                                                                                                                                              |   | Three      Months Ended |       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------|------------|
|                                                                                                                                                                                                                                              |   | March      31,          |       |
| (in      millions, except per share amounts)                                                                                                                                                                                                      |   | 2009                    |       |   | 2008 |   |
| Income      Available for Common Shareholders                                                                                                                                                                                                     |   | $                       | 241        |   |   | $ | 224 |   |
| Less:      distributed earnings to common shareholders                                                                                                                                                                                            |   |                    | 154   |   |   |   | 139  |   |
| Undistributed      earnings                                                                                                                                                                                                                       |   | $                       | 87         |   |   | $ | 85 |   |
| Common      shareholders earnings                                                                                                                                                                                                                 |   |                    |       |   |   |   |   |   |
| Basic                                                                                                                                                                                                                                             |   |                    |       |   |   |   |   |   |
| Distributed      earnings to common shareholders                                                                                                                                                                                                  |   | $                       | 154        |   |   | $ | 139 |   |
| Undistributed      earnings allocated to common shareholders                                                                                                                                                                                      |   |                    | 83    |   |   |   | 81  |   |
| Total      common shareholders earnings, basic                                                                                                                                                                                                    |   | $                       | 237        |   |   | $ | 220 |   |
| Diluted                                                                                                                                                                                                                                           |   |                    |       |   |   |   |   |   |
| Distributed      earnings to common shareholders                                                                                                                                                                                                  |   | $                       | 154        |   |   | $ | 139 |   |
| Undistributed      earnings allocated to common shareholders                                                                                                                                                                                      |   |                    | 83    |   |   |   | 81  |   |
| Total      common shareholders earnings, diluted                                                                                                                                                                                                  |   | $                       | 237        |   |   | $ | 220 |   |
| Weighted      average common shares outstanding, basic                                                                                                                                                                                            |   |                    | 364        |   |   |   | 355 |   |
| 9.50%      Convertible Subordinated Notes                                                                                                                                                                                                         |   |                    | 17    |   |   |   | 19  |   |
| Weighted      average common shares outstanding and participating securities,      basic                                                                                                                                                          |   |                    | 381   |   |   |   | 374  |   |
| Weighted      average common shares outstanding, basic                                                                                                                                                                                            |   |                    | 364        |   |   |   | 355 |   |
| Employee      share-based compensation                                                                                                                                                                                                            |   |                    | 2     |   |   |   | 1  |   |
| Weighted      average common shares outstanding, diluted                                                                                                                                                                                          |   |                    | 366        |   |   |   | 356 |   |
| 9.50%      Convertible Subordinated Notes                                                                                                                                                                                                         |   |                    | 17    |   |   |   | 19  |   |
| Weighted      average common shares outstanding and participating securities,      diluted                                                                                                                                                        |   |                    | 383   |   |   |   | 375  |   |
| Net      earnings per common share, basic                                                                                                                                                                                                         |   |                    |       |   |   |   |   |   |
| Distributed      earnings, basic (1)                                                                                                                                                                                                              |   | $                       | 0.42       |   |   | $ | 0.39 |   |
| Undistributed      earnings, basic                                                                                                                                                                                                                |   |                    | 0.23  |   |   |   | 0.23  |   |
| Total                                                                                                                                                                                                                                             |   | $                       | 0.65       |   |   | $ | 0.62 |   |
| Net      earnings per common share, diluted                                                                                                                                                                                                       |   |                    |       |   |   |   |   |   |
| Distributed      earnings, diluted                                                                                                                                                                                                                |   | $                       | 0.42       |   |   | $ | 0.39 |   |
| Undistributed      earnings, diluted                                                                                                                                                                                                              |   |                    | 0.23  |   |   |   | 0.23  |   |
| Total                                                                                                                                                                                                                                             |   | $                       | 0.65       |   |   | $ | 0.62 |   |
|                                                                                                                                                                                                                                              |   |                    |       |   |   |   |   |   |
| (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. |   |