<ARTICLE> 5
<MULTIPLIER> 1,000,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                              72
<SECURITIES>                                     2,180
<RECEIVABLES>                                    1,764
<ALLOWANCES>                                        32
<INVENTORY>                                        609
<CURRENT-ASSETS>                                 5,189
<PP&E>                                          22,454
<DEPRECIATION>                                   8,419
<TOTAL-ASSETS>                                  22,194
<CURRENT-LIABILITIES>                            5,949
<BONDS>                                          3,972
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           182
<OTHER-SE>                                       6,378
<TOTAL-LIABILITY-AND-EQUITY>                    22,194
<SALES>                                              0
<TOTAL-REVENUES>                                14,604
<CGS>                                                0
<TOTAL-COSTS>                                   12,600
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 280
<INCOME-PRETAX>                                  1,858
<INCOME-TAX>                                       734
<INCOME-CONTINUING>                              1,124
<DISCONTINUED>                                       8
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     1,132
<EPS-PRIMARY>                                     6.62
<EPS-DILUTED>                                     6.39