<ARTICLE>                                           5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE PERIOD ENDED MARCH 31, 1998,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                    1,000,000
       
                                                               
<PERIOD-TYPE>                                      3-MOS
<FISCAL-YEAR-END>                                  DEC-31-1998
<PERIOD-END>                                       MAR-31-1998
<CASH>                                                                       255
<SECURITIES>                                                                   0
<RECEIVABLES>                                                                416
<ALLOWANCES>                                                                  23
<INVENTORY>                                                                  669
<CURRENT-ASSETS>                                                           3,230
<PP&E>                                                                    19,789
<DEPRECIATION>                                                             7,935
<TOTAL-ASSETS>                                                            16,628
<CURRENT-LIABILITIES>                                                      3,161
<BONDS>                                                                    6,166
<PREFERRED-MANDATORY>                                                          0
<PREFERRED>                                                                  295
<COMMON>                                                                      73
<OTHER-SE>                                                                 3,683
<TOTAL-LIABILITY-AND-EQUITY>                                              16,628
<SALES>                                                                    1,700
<TOTAL-REVENUES>                                                           1,892
<CGS>                                                                      1,265
<TOTAL-COSTS>                                                              1,265
<OTHER-EXPENSES>                                                              23
<LOSS-PROVISION>                                                               0
<INTEREST-EXPENSE>                                                           131
<INCOME-PRETAX>                                                              288
<INCOME-TAX>                                                                 156
<INCOME-CONTINUING>                                                          139
<DISCONTINUED>                                                                38
<EXTRAORDINARY>                                                                0
<CHANGES>                                                                      0
<NET-INCOME>                                                                 177
<EPS-PRIMARY>                                                                .50
<EPS-DILUTED>                                                                .49