<ARTICLE>                   5
<LEGEND>                    This schedule contains summary financial information extracted
                            from Consolidated Summary Financial Statements and Notes
                            included in this Form 10-Q and is qualified in its entirety by
                            reference to such financial statements.
<MULTIPLIER>                1,000
<FISCAL-YEAR-END>           DEC-31-1995
<PERIOD-END>                MAR-31-1995
<PERIOD-TYPE>               3-MOS
       
                         
<CASH>                                         160,900
<SECURITIES>                                         0
<RECEIVABLES>                                  169,900
<ALLOWANCES>                                         0
<INVENTORY>                                    217,800
<CURRENT-ASSETS>                               560,300
<PP&E>                                       2,434,400
<DEPRECIATION>                             (1,113,900)
<TOTAL-ASSETS>                               2,629,800
<CURRENT-LIABILITIES>                          340,200
<BONDS>                                        193,700
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       117,000
<OTHER-SE>                                   1,666,100
<TOTAL-LIABILITY-AND-EQUITY>                 2,629,800
<SALES>                                        686,800
<TOTAL-REVENUES>                               686,800
<CGS>                                          525,600
<TOTAL-COSTS>                                  600,300
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,300
<INCOME-PRETAX>                                 87,300
<INCOME-TAX>                                    32,100
<INCOME-CONTINUING>                             54,300
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    54,300
<EPS-PRIMARY>                                         .50
<EPS-DILUTED>                                        0