<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-31-1997
<PERIOD-END>                               MAR-31-1997
<CASH>                                          $1,449
<SECURITIES>                                       805
<RECEIVABLES>                                    1,749
<ALLOWANCES>                                         0
<INVENTORY>                                        992
<CURRENT-ASSETS>                                 5,282
<PP&E>                                          34,966
<DEPRECIATION>                                  18,829
<TOTAL-ASSETS>                                  25,646
<CURRENT-LIABILITIES>                            5,077
<BONDS>                                          5,407
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          1
<COMMON>                                           403
<OTHER-SE>                                       7,673
<TOTAL-LIABILITY-AND-EQUITY>                    25,646
<SALES>                                          5,044
<TOTAL-REVENUES>                                 5,183
<CGS>                                            3,900
<TOTAL-COSTS>                                    4,026
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 166
<INCOME-PRETAX>                                    740
<INCOME-TAX>                                       236
<INCOME-CONTINUING>                                483
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       483
<EPS-PRIMARY>                                    $2.95
<EPS-DILUTED>                                    $2.95