<ARTICLE> 5
<LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 
THE MARCH 31, 1997 CONSOLIDATED BALANCE SHEET AND THE CONSOLIDATED STATEMENT OF 
INCOME FOR THE THREE-MONTH PERIOD ENDED MARCH 31, 1997, AND IS QUALIFIED IN ITS 
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS AND THE FOOTNOTES THERETO. 
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                         DEC-31-1997
<PERIOD-START>                            JAN-01-1997
<PERIOD-END>                              MAR-31-1997
<CASH>                                        491,749 
<SECURITIES>                                  653,006 
<RECEIVABLES>                               1,661,389 
<ALLOWANCES>                                   42,781 
<INVENTORY>                                         0 
<CURRENT-ASSETS>                            3,548,013         
<PP&E>                                     14,022,075      
<DEPRECIATION>                              4,483,466    
<TOTAL-ASSETS>                             18,033,599      
<CURRENT-LIABILITIES>                       3,690,495    
<BONDS>                                     6,139,969  
<PREFERRED-MANDATORY>                               0 
<PREFERRED>                                         0 
<COMMON>                                      507,102 
<OTHER-SE>                                  4,471,910       
<TOTAL-LIABILITY-AND-EQUITY>               18,033,599         
<SALES>                                             0          
<TOTAL-REVENUES>                            2,198,308          
<CGS>                                               0          
<TOTAL-COSTS>                               1,551,718          
<OTHER-EXPENSES>                                    0       
<LOSS-PROVISION>                                6,705      
<INTEREST-EXPENSE>                             98,349       
<INCOME-PRETAX>                               303,626       
<INCOME-TAX>                                  125,214      
<INCOME-CONTINUING>                           178,412      
<DISCONTINUED>                                      0  
<EXTRAORDINARY>                                     0      
<CHANGES>                                           0  
<NET-INCOME>                                  178,412 
<EPS-PRIMARY>                                    0.37 
<EPS-DILUTED>                                    0.00