EXHIBIT 12 RATIO OF EARNINGS TO COMBINED FIXED CHARGES (DOLLARS IN MILLIONS) NINE MONTHS ENDED YEAR ENDED DECEMBER 31, SEPT. 30, ---------------------------------------- ----------------- 1991 1992 1993 1994 1995 1995 1996 ------- ------- ------ ------ ------ -------- -------- Pretax Income........... $(256.6) $(542.6) $(42.7) $152.0 $281.5 $ 224.5 $ 188.9 Interest expense........ 40.8 46.4 58.1 48.2 35.6 26.6 28.4 Interest factor in rent expense................ 0.9 1.2 0.8 0.8 1.1 0.6 0.7 Distributed income of less than 50% owned affiliates............. 0.0 0.1 (2.2) (2.3) 0.0 0.0 0.0 ------- ------- ------ ------ ------ -------- -------- Total earnings.......... (214.9) (494.9) 14.0 198.7 318.2 251.7 218.0 Total combined fixed charges................ $ 48.8 $ 51.1 $ 60.1 $ 55.6 $ 57.4 $ 43.8 $ 44.1 Ratio of earnings to combined fixed charges................ 3.6 5.5 5.7 4.9 Deficiency of earnings to fixed charges....... $(263.7) $(546.0) $(46.1) Combined fixed charges: Preferred dividends... n/a n/a n/a 4.0 16.0 12.7 13.9 Interest expense...... 40.8 46.4 58.1 48.2 35.6 26.6 28.4 Capitalized interest credit............... 7.1 3.5 1.2 2.6 4.7 3.9 1.1 Interest factor in rent expense......... 0.9 1.2 0.8 0.8 1.1 0.6 0.7 ------- ------- ------ ------ ------ -------- -------- Total combined fixed charges............... 48.8 51.1 60.1 55.6 57.4 43.8 44.1