<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE COMPANY'S BALANCE SHEET AT JUNE 30, 2000 AND INCOME STATEMENT FOR
THE SIX MONTHS ENDED JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS AND THEIR RELATED FOOTNOTES.

<MULTIPLIER>                                   1,000,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>               DEC-31-2000
<PERIOD-END>                    JUN-30-2000

<CASH>                                         1,102
<SECURITIES>                                     622
<RECEIVABLES>                                  4,198
<ALLOWANCES>                                      37
<INVENTORY>                                    1,512
<CURRENT-ASSETS>                               8,566
<PP&E>                                        54,701
<DEPRECIATION>                                29,608
<TOTAL-ASSETS>                                41,378
<CURRENT-LIABILITIES>                          8,396
<BONDS>                                        5,366
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0
<COMMON>                                         534
<OTHER-SE>                                    18,216
<TOTAL-LIABILITY-AND-EQUITY>                  41,378
<SALES>                                       24,305
<TOTAL-REVENUES>                              24,889
<CGS>                                              0
<TOTAL-COSTS>                                 20,906
<OTHER-EXPENSES>                                   0
<LOSS-PROVISION>                                   0
<INTEREST-EXPENSE>                               255
<INCOME-PRETAX>                                3,983
<INCOME-TAX>                                   1,823
<INCOME-CONTINUING>                            2,160
<DISCONTINUED>                                     0
<EXTRAORDINARY>                                    0
<CHANGES>                                          0
<NET-INCOME>                                   2,160
<EPS-BASIC>                                    3.30
<EPS-DILUTED>                                  3.30