Exhibit 12 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES The earnings to fixed charges ratio is calculated using the Securities and Exchange Commission guidelines. ---------------------------------------------------------- SIX MONTHS YEAR ENDED DECEMBER 31. ENDED JUNE 30, --------------------------------------------------------------------------- 2001 2000 1999 1998 1997(a) 2002 --------------------------------------------------------------------------- Dollars in millions Earnings as defined for fixed charges calculation Add: Pretax income from continuing operations(b) $3,303 $3,000 $1,331 $2,055 $1,598 $1,232 Fixed charges 1,128 1,123 757 599 535 678 Distributed income of equity investees 156 138 111 94 55 111 Deduct: Preference security dividend requirements of consolidated subsidiaries 170 126 87 44 15 84 Interest capitalized(c) 139 54 37 15 20 117 ------ ------ ------ ------ ------ ----- Total earnings $4,278 $4,081 $2,075 $2,689 $2,153 $1,820 ====== ====== ====== ====== ====== ====== Fixed charges: Interest on debt, including capitalized portions $ 924 $ 970 $ 644 $ 533 $ 497 $ 572 Estimate of interest within rental expense 34 27 26 22 23 22 Preference security dividend requirements of consolidated subsidiaries 170 126 87 44 15 84 ------ ------ ------ ------ ------ ------ Total fixed charges $1,128 $1,123 $ 757 $ 599 $ 535 $ 678 ====== ====== ====== ====== ====== ====== Ratio of earnings to fixed charges 3.8 3.6 2.7 4.5 4.0 2.7 (a) Financial information reflects accounting for the 1997 merger with PanEnergy as a pooling of interests. As a result, the financial information gives effect to the merger as if it had occurred January 1, 1997. (b) Excludes minority interest expenses and income or loss from equity investees (c) Excludes equity costs related to Allowance for Funds Used During Construction that are included in Other Income and Expenses in the Consolidated Statements of Income