<ARTICLE>      5
<LEGEND>
This schedule contains summary financial information extracted from the
Consolidated Statement of Income and the Consolidated Balance Sheet and
is qualified in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER>   1,000,000
       
                                     
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                         $   665
<SECURITIES>                                       230
<RECEIVABLES>                                    1,511
<ALLOWANCES>                                         0
<INVENTORY>                                      1,065
<CURRENT-ASSETS>                                 3,799
<PP&E>                                          36,120
<DEPRECIATION>                                  19,468
<TOTAL-ASSETS>                                  25,223
<CURRENT-LIABILITIES>                            4,917
<BONDS>                                          4,336
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          1
<COMMON>                                           807
<OTHER-SE>                                       7,897
<TOTAL-LIABILITY-AND-EQUITY>                    25,223
<SALES>                                         14,184
<TOTAL-REVENUES>                                14,695
<CGS>                                           11,316
<TOTAL-COSTS>                                   11,645
<OTHER-EXPENSES>                                   175
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 307
<INCOME-PRETAX>                                  2,400
<INCOME-TAX>                                       849
<INCOME-CONTINUING>                              1,507
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                    118
<CHANGES>                                            0
<NET-INCOME>                                     1,389
<EPS-PRIMARY>                                    $4.23
<EPS-DILUTED>                                    $4.23