<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>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                         $   535
<SECURITIES>                                       231
<RECEIVABLES>                                    1,411
<ALLOWANCES>                                         0
<INVENTORY>                                        981
<CURRENT-ASSETS>                                 3,437
<PP&E>                                          36,094
<DEPRECIATION>                                  19,662
<TOTAL-ASSETS>                                  25,159
<CURRENT-LIABILITIES>                            4,993
<BONDS>                                          4,411
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          1
<COMMON>                                           807
<OTHER-SE>                                       7,701
<TOTAL-LIABILITY-AND-EQUITY>                    25,159
<SALES>                                          3,431
<TOTAL-REVENUES>                                 3,550
<CGS>                                            2,728
<TOTAL-COSTS>                                    2,877
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 115
<INCOME-PRETAX>                                    327
<INCOME-TAX>                                        90
<INCOME-CONTINUING>                                210
<DISCONTINUED>                                      10
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       220
<EPS-PRIMARY>                                    $0.69
<EPS-DILUTED>                                    $0.67