<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
CONSOLIDATED STATEMENTS OF INCOME AND CONSOLIDATED BALANCE SHEETS.
</LEGEND>
<MULTIPLIER> 1,000,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                              89
<SECURITIES>                                         0
<RECEIVABLES>                                      730
<ALLOWANCES>                                         0<F1>
<INVENTORY>                                         46
<CURRENT-ASSETS>                                 1,426
<PP&E>                                           7,172
<DEPRECIATION>                                       0<F1>
<TOTAL-ASSETS>                                   9,630
<CURRENT-LIABILITIES>                            2,297
<BONDS>                                          2,113
<PREFERRED-MANDATORY>                              325
<PREFERRED>                                          0
<COMMON>                                           372
<OTHER-SE>                                       1,647
<TOTAL-LIABILITY-AND-EQUITY>                     9,630
<SALES>                                              0
<TOTAL-REVENUES>                                 2,915
<CGS>                                                0
<TOTAL-COSTS>                                    2,661
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 125
<INCOME-PRETAX>                                    187
<INCOME-TAX>                                        62
<INCOME-CONTINUING>                                113
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       113
<EPS-PRIMARY>                                     0.97<F2>
<EPS-DILUTED>                                     0.92
<FN>
<F1>Not separately identified in the consolidated financial statements or
accompanying notes thereto.
<F2>Represents basic earnings per share.
</FN>