<ARTICLE>                     5
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                              Dec-31-1996
<PERIOD-END>                                   Jun-30-1996
<CASH>                                         1,756,600
<SECURITIES>                                   0
<RECEIVABLES>                                  2,421,200
<ALLOWANCES>                                   123,400
<INVENTORY>                                    266,200
<CURRENT-ASSETS>                               4,646,300
<PP&E>                                         20,567,300
<DEPRECIATION>                                 10,771,200
<TOTAL-ASSETS>                                 16,456,500
<CURRENT-LIABILITIES>                          2,988,100
<BONDS>                                        3,159,000
<PREFERRED-MANDATORY>                          14,100
<PREFERRED>                                    0
<COMMON>                                       1,091,300
<OTHER-SE>                                     7,125,600
<TOTAL-LIABILITY-AND-EQUITY>                   16,456,500
<SALES>                                        0
<TOTAL-REVENUES>                               6,806,600
<CGS>                                          0
<TOTAL-COSTS>                                  4,166,900
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             97,200
<INCOME-PRETAX>                                1,014,700
<INCOME-TAX>                                   386,000
<INCOME-CONTINUING>                            628,700
<DISCONTINUED>                                 (2,600)
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   626,100
<EPS-PRIMARY>                                  1.52
<EPS-DILUTED>                                  1.50