<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED STATEMENT OF INCOME FOR THE THREE MONTHS ENDED MARCH 31, 1998 AND
THE CONSOLIDATED BALANCE SHEET AT MARCH 31, 1998 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-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           1,150
<SECURITIES>                                         0
<RECEIVABLES>                                    6,895
<ALLOWANCES>                                       617
<INVENTORY>                                        545
<CURRENT-ASSETS>                                 9,246
<PP&E>                                          78,655
<DEPRECIATION>                                  43,308
<TOTAL-ASSETS>                                  54,314
<CURRENT-LIABILITIES>                           11,480
<BONDS>                                         15,679
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           158<F1>
<OTHER-SE>                                      12,680<F1>
<TOTAL-LIABILITY-AND-EQUITY>                    54,314
<SALES>                                              0
<TOTAL-REVENUES>                                 7,651
<CGS>                                                0
<TOTAL-COSTS>                                    5,939
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 310
<INCOME-PRETAX>                                  1,438
<INCOME-TAX>                                       529
<INCOME-CONTINUING>                                909 
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                   (16)
<CHANGES>                                            0
<NET-INCOME>                                       893
<EPS-PRIMARY>                                      .57<F1>
<EPS-DILUTED>                                      .56<F1>
        
<FN>
<F1> Adjusted to reflect a two-for-one stock split on June 1, 1998.
</FN>