<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S FORM 10-Q FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2000 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                             411
<SECURITIES>                                         0
<RECEIVABLES>                                      747
<ALLOWANCES>                                         0
<INVENTORY>                                         86
<CURRENT-ASSETS>                                 1,675
<PP&E>                                          22,901
<DEPRECIATION>                                   6,334
<TOTAL-ASSETS>                                  21,211
<CURRENT-LIABILITIES>                            3,690
<BONDS>                                          5,786
<PREFERRED-MANDATORY>                               17
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                      16,674
<TOTAL-LIABILITY-AND-EQUITY>                    21,211
<SALES>                                          5,022
<TOTAL-REVENUES>                                 6,904
<CGS>                                            4,180
<TOTAL-COSTS>                                    4,569
<OTHER-EXPENSES>                                  (80)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 207
<INCOME-PRETAX>                                  1,436
<INCOME-TAX>                                       459
<INCOME-CONTINUING>                                977
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       977
<EPS-BASIC>                                        .73
<EPS-DILUTED>                                      .71