<ARTICLE>                5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED 
FROM THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE 
PERIOD ENDED SEPTEMBER 30, 1997, AND IS QUALIFIED IN ITS ENTIRETY 
BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>               1,000,000
        
                                                     
<PERIOD-TYPE>                       9-MOS
<FISCAL-YEAR-END>                   DEC-31-1997
<PERIOD-END>                        SEP-30-1997
<CASH>                                                        170
<SECURITIES>                                                    0
<RECEIVABLES>                                                 575
<ALLOWANCES>                                                   24
<INVENTORY>                                                   650
<CURRENT-ASSETS>                                            1,914
<PP&E>                                                     23,350
<DEPRECIATION>                                              9,327
<TOTAL-ASSETS>                                             17,570
<CURRENT-LIABILITIES>                                       2,146
<BONDS>                                                     5,021
<PREFERRED-MANDATORY>                                           0
<PREFERRED>                                                 2,611
<COMMON>                                                       68
<OTHER-SE>                                                  2,678
<TOTAL-LIABILITY-AND-EQUITY>                               17,570
<SALES>                                                     8,122
<TOTAL-REVENUES>                                            8,223
<CGS>                                                       6,148
<TOTAL-COSTS>                                               6,148
<OTHER-EXPENSES>                                               84
<LOSS-PROVISION>                                                0
<INTEREST-EXPENSE>                                            325
<INCOME-PRETAX>                                               914
<INCOME-TAX>                                                  420
<INCOME-CONTINUING>                                           494
<DISCONTINUED>                                                  0
<EXTRAORDINARY>                                                 0
<CHANGES>                                                       0
<NET-INCOME>                                                  494
<EPS-PRIMARY>                                                1.28
<EPS-DILUTED>                                                1.23