EXHIBIT 11 COMPUTATION OF PRIMARY AND FULLY DILUTED NET INCOME PER COMMON SHARE THREE MONTHS ENDED JUNE 30 SIX MONTHS ENDED JUNE 30 (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA) 1996 1995 1996 1995 PRIMARY: Average shares outstanding 137,725,350 133,869,847 136,155,737 133,833,696 Net effect of the assumed purchase of stock under the stock option and stock purchase plans--based on the treasury stock method using average market price 2,049,153 1,985,539 2,227,166 1,884,403 139,774,503 135,855,386 138,382,903 135,718,099 Net income $254.1 $137.9 $430.9 $271.7 Preferred dividends (1.6) (1.9) (3.3) (3.8) Net income applicable to common equity $252.5 $136.0 $427.6 $267.9 Net income per common share $1.81 $1.00 $3.09 $1.97 FULLY DILUTED: * Average shares outstanding 137,725,350 133,869,847 136,155,737 133,833,696 Net effect of the assumed purchase of stock under the stock option and stock purchase plans--based on the treasury stock method using average market price or period-end market price, whichever is higher 2,051,711 1,991,663 2,325,038 2,146,433 Assumed conversion of Series 1991A Preferred Stock 3,107,268 3,647,401 3,275,485 3,647,401 142,884,329 139,508,911 141,756,260 139,627,530 Net income $254.1 $137.9 $430.9 $271.7 Preferred dividends, excluding 1991A Preferred Stock -- -- -- -- Net income applicable to common equity $254.1 $137.9 $430.9 $271.7 Net income per common share $1.78 $.99 $3.04 $1.95 *This calculation is submitted in accordance with Regulation S-K item 601(b)(11) although not required by footnote 2 to paragraph 17 of APB Opinion No. 15 because it results in dilution of less than 3%.