Exhibit No. 11(a) COMPUTATION FOR BASIC EARNINGS PER SHARE FOR THE YEARS ENDED DECEMBER 31 (AMOUNTS IN MILLIONS EXCEPT FOR PER-SHARE DATA) 1998 1997 1996 ---- ---- ---- Common Stock and Common Stock Equivalents - ----------------------------------------- Average number of common shares outstanding 39.8 40.6 39.1 ==== ===== ==== Basic Earnings (Loss) Per Share - ------------------------------- Earnings (loss) from continuing businesses $(9.3) $185.0 $164.8 Less: Dividend requirement on Series A convertible preferred stock -- -- 8.8 Plus: Tax benefit on dividends paid on unallocated preferred shares -- -- 2.0 ---- ---- ----- Earnings (loss) available for common - ------------------------------------ shareholders: - ------------ Continuing businesses before extraordinary (9.3) 185.0 158.0 loss Extraordinary Loss -- -- (8.9) ---- ---- ----- Net Earnings (loss) $(9.3) $185.0 $149.1 ====== ====== ====== Basic earnings (loss) per share of common stock - ----------------------------------------------- Continuing businesses, before extraordinary $(0.23) $4.55 $4.04 loss Extraordinary Loss -- -- (0.23) ---- ---- ------ Net Earnings (loss) $(0.23) $4.55 $3.81 ======= ===== =====