<ARTICLE> 5
<MULTIPLIER> 1000



                            
<PERIOD-TYPE>                  6-MOS
<FISCAL-YEAR-END>              DEC-31-2000
<PERIOD-END>                   JUN-30-2000
<CASH>                             136,442
<SECURITIES>                             0
<RECEIVABLES>                    1,043,180
<ALLOWANCES>                       (39,309)
<INVENTORY>                         41,156
<CURRENT-ASSETS>                 1,343,184
<PP&E>                           2,091,800
<DEPRECIATION>                    (939,919)
<TOTAL-ASSETS>                   3,269,932
<CURRENT-LIABILITIES>            1,013,453
<BONDS>                            534,667
<PREFERRED-MANDATORY>              125,000
<PREFERRED>                        126,466
<COMMON>                           364,896
<OTHER-SE>                         545,398
<TOTAL-LIABILITY-AND-EQUITY>     3,269,932
<SALES>                                  0
<TOTAL-REVENUES>                 2,991,956
<CGS>                                    0
<TOTAL-COSTS>                    2,831,022
<OTHER-EXPENSES>                    12,555
<LOSS-PROVISION>                         0
<INTEREST-EXPENSE>                  14,281
<INCOME-PRETAX>                    148,379
<INCOME-TAX>                        63,061
<INCOME-CONTINUING>                 85,318
<DISCONTINUED>                           0
<EXTRAORDINARY>                          0
<CHANGES>                                0
<NET-INCOME>                        81,212
<EPS-BASIC>                         1.68
<EPS-DILUTED>                         1.49