EXHIBIT 12 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
FIRST SIX MONTHS ---------- 1992 1993 1994 1995 1996 1996 1997 ---- ---- ---- ---- ---- ----- ----- $ MILLIONS Earnings before income taxes...... $ 76 $205 $294 $177 $214 $ 133 $ 130 Tax provision of 50% or more owned unconsolidated companies......... 3 3 6 5 6 2 3 Amortization of capitalized inter- est: Consolidated companies........... 3 3 3 2 3 1 2 50% or more owned unconsolidated companies....................... 1 1 1 1 1 1 -- ---- ---- ---- ---- ---- ----- ----- Adjusted earnings before income taxes........................... 83 212 304 185 224 137 135 ---- ---- ---- ---- ---- ----- ----- Interest expense: Consolidated companies........... 41 36 17 13 18 8 12 50% or more owned unconsolidated companies....................... 17 4 3 2 7 3 4 Capitalized interest costs....... 2 2 3 8 7 4 6 Amortization of debt discount and issuance costs.................. 1 1 1 1 1 1 -- Appropriate portion of rentals under operating leases.......... 15 17 17 18 18 9 10 ---- ---- ---- ---- ---- ----- ----- Total fixed charges.............. 76 60 41 42 51 25 32 ---- ---- ---- ---- ---- ----- ----- Capitalized interest costs....... (2) (2) (3) (8) (7) (4) (6) ---- ---- ---- ---- ---- ----- ----- Earnings available for fixed charges.......................... $157 $270 $342 $219 $268 $ 158 $ 161 ==== ==== ==== ==== ==== ===== ===== Ratio............................. 2.1x 4.5x 8.3x 5.2x 5.3x 6.3x 5.0x ==== ==== ==== ==== ==== ===== =====
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED AND PREFERENCE DIVIDENDS
FIRST SIX MONTHS ---------- 1992 1993 1994 1995 1996 1996 1997 ---- ---- ---- ---- ---- ---- ---- $ MILLIONS Earnings before income taxes........ $ 76 $205 $294 $177 $214 $133 $130 Tax provision of 50% or more owned unconsolidated companies........... 3 3 6 5 6 2 3 Amortization of capitalized interests: Consolidated companies............. 3 3 3 2 3 1 2 50% or more owned unconsolidated companies......................... 1 1 1 1 1 1 -- ---- ---- ---- ---- ---- ---- ---- Adjusted earnings before income taxes............................. 83 212 304 185 224 137 135 Interest expense: Consolidated companies............. 41 36 17 13 18 8 12 50% or more owned unconsolidated companies......................... 17 4 3 2 7 3 4 Capitalized interest costs......... 2 2 3 8 7 4 6 Amortization of debt discount and issuance costs.................... 1 1 1 1 1 1 -- Appropriate portion of rentals under operating leases............ 15 17 17 18 18 9 10 Preferred and preference dividend requirements...................... 8 8 -- -- -- -- -- Factor............................. 1.12 1.11 -- -- -- -- -- ---- ---- ---- ---- ---- ---- ---- 9 9 -- -- -- -- -- ---- ---- ---- ---- ---- ---- ---- Total fixed charges................ 85 69 41 42 51 25 32 ---- ---- ---- ---- ---- ---- ---- Capitalized interest costs......... (2) (2) (3) (8) (7) (4) (6) ---- ---- ---- ---- ---- ---- ---- Earnings available for fixed charges............................ $166 $279 $342 $219 $268 $158 $161 ==== ==== ==== ==== ==== ==== ==== Ratio............................... 2.0x 4.0x 8.3x 5.2x 5.3x 6.3x 5.0x ==== ==== ==== ==== ==== ==== ====