<ARTICLE>                     5
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                              Dec-31-1997
<PERIOD-END>                                   Dec-31-1997
<CASH>                                         101,700
<SECURITIES>                                   0
<RECEIVABLES>                                  2,642,300
<ALLOWANCES>                                   146,700
<INVENTORY>                                    352,000
<CURRENT-ASSETS>                               3,772,600
<PP&E>                                         23,210,900
<DEPRECIATION>                                 11,716,800
<TOTAL-ASSETS>                                 18,184,800
<CURRENT-LIABILITIES>                          3,076,800
<BONDS>                                        3,748,600
<PREFERRED-MANDATORY>                          11,500
<PREFERRED>                                    0
<COMMON>                                       1,091,300
<OTHER-SE>                                     7,933,900
<TOTAL-LIABILITY-AND-EQUITY>                   18,184,800
<SALES>                                        0
<TOTAL-REVENUES>                               14,873,900
<CGS>                                          0
<TOTAL-COSTS>                                  9,177,300
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             187,200
<INCOME-PRETAX>                                1,583,000
<INCOME-TAX>                                   630,500
<INCOME-CONTINUING>                            952,500
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   952,500
<EPS-PRIMARY>                                  2.21
<EPS-DILUTED>                                  2.18