<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
STATEMENTS OF INCOME AND CONSOLIDATED BALANCE SHEETS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH.
</LEGEND>
<MULTIPLIER> 1,000,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                              78
<SECURITIES>                                         0
<RECEIVABLES>                                      889
<ALLOWANCES>                                         0<F1>
<INVENTORY>                                         77
<CURRENT-ASSETS>                                 1,442
<PP&E>                                           6,385
<DEPRECIATION>                                       0<F1>
<TOTAL-ASSETS>                                   8,654
<CURRENT-LIABILITIES>                            2,050
<BONDS>                                          2,188
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           182
<OTHER-SE>                                       1,681
<TOTAL-LIABILITY-AND-EQUITY>                     8,654
<SALES>                                              0
<TOTAL-REVENUES>                                 2,810
<CGS>                                                0
<TOTAL-COSTS>                                    2,546
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 120
<INCOME-PRETAX>                                    168
<INCOME-TAX>                                        65
<INCOME-CONTINUING>                                 91
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                        91
<EPS-PRIMARY>                                     1.60
<EPS-DILUTED>                                     0.00
<FN>
<F1>NOT SEPARATELY IDENTIFIED IN THE CONSOLIDATED FINANCIAL STATEMENTS OR
ACCOMPANYING NOTES THERETO.
</FN>