<ARTICLE> 5 <MULTIPLIER> 1,000,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 136 <SECURITIES> 0 <RECEIVABLES> 1,489 <ALLOWANCES> 0 <INVENTORY> 578 <CURRENT-ASSETS> 2,508 <PP&E> 6,114 <DEPRECIATION> 3,511 <TOTAL-ASSETS> 6,081 <CURRENT-LIABILITIES> 2,394 <BONDS> 531 <COMMON> 77 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 2,148 <TOTAL-LIABILITY-AND-EQUITY> 6,081 <SALES> 8,033 <TOTAL-REVENUES> 8,033 <CGS> 6,551 <TOTAL-COSTS> 6,551 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 57 <INCOME-PRETAX> 580 <INCOME-TAX> 218 <INCOME-CONTINUING> 362 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 362 <EPS-PRIMARY> 2.85 <EPS-DILUTED> 2.82