|                                                                                                                               |   | Three Months EndedJune 30, |   |    | Six Months EndedJune 30, |   |   | Year Ended December 31, |   |
|------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------------|--------|---------|-------------------------------|--------|--------|-------------------------|--------|
|                                                                                                                               |   | 2009                       |   |    | 2009                          |   |   | 2008                    |   |   | 2007 |   |   | 2006 |   |   | 2005 |   |   | 2004 |   |
| Earnings:                                                                                                                          |   |                       |   |    |                          |   |   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Income from continuing operations                                                                                                  |   | $                          | 392    |    |                          | $      | 636    |                    |   | $ | 1,198 |   |   | $ | 1,020 |   |   | $ | 1,005 |   |   | $ | 920 |   |   | $ | 3,841 |   |
| Income taxes provision                                                                                                             |   |                       | 125    |    |                          |   | 240    |                    |   |   | 425 |   |   |   | 539 |   |   |   | 554 |   |   |   | 544 |   |   |   | 2,466 |   |
| Net fixed charges                                                                                                                  |   |                       | 220    |    |                          |   | 443    |                    |   |   | 907 |   |   |   | 937 |   |   |   | 845 |   |   |   | 639 |   |   |   | 855 |   |
| Pre-tax earnings required to   cover the preferred stock   dividend of consolidated    subsidiaries  |   |                       | (5     | )  |                          |   | (8     | )                  |   |   | (16 | )  |   |   | (17 | ) |   |   | (15 | )  |   |   | (20 | )  |   |   | (29 | )  |
| Total Earnings                                                                                                                     |   | $                          | 732    |    |                          | $      | 1,311  |                    |   | $ | 2,514 |   |   | $ | 2,479 |   |   | $ | 2,389 |   |   | $ | 2,083 |   |   | $ | 7,133 |   |
| Fixed Charges:                                                                                                                     |   |                       |   |    |                          |   |   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest and amortization of premiums, discounts and capitalized expenses related to short-term borrowings and long-term debt, net |   | $                          | 200    |    |                          | $      | 403    |                    |   | $ | 825 |   |   | $ | 865 |   |   | $ | 799 |   |   | $ | 603 |   |   | $ | 813 |   |
| Interest on capital leases                                                                                                         |   |                       | 5      |    |                          |   | 10     |                    |   |   | 22 |   |   |   | 23 |   |   |   | 11 |   |   |   | 1 |   |   |   | 1 |   |
| AFUDC debt                                                                                                                         |   |                       | 10     |    |                          |   | 22     |                    |   |   | 44 |   |   |   | 32 |   |   |   | 20 |   |   |   | 15 |   |   |   | 12 |   |
| Pre-tax earnings required to   cover the preferred stock    dividend of consolidated   subsidiaries  |   |                       | 5      |    |                          |   | 8      |                    |   |   | 16 |   |   |   | 17 |   |   |   | 15 |   |   |   | 20 |   |   |   | 29 |   |
| Total Fixed Charges                                                                                                                |   | $                          | 220    |    |                          | $      | 443    |                    |   | $ | 907 |   |   | $ | 937 |   |   | $ | 845 |   |   | $ | 639 |   |   | $ | 855 |   |
| Ratios of Earnings toFixed Charges                                                                                                 |   |                       | 3.33   |    |                          |   | 2.96   |                    |   |   | 2.77 |   |   |   | 2.65 |   |   |   | 2.83 |   |   |   | 3.26 |   |   |   | 8.34 |   |