<ARTICLE>              5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE PERIOD ENDED SEPTEMBER 30,
1996, 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-31-1996
<PERIOD-END>                    SEP-30-1996
<CASH>                                             135
<SECURITIES>                                         0
<RECEIVABLES>                                      728
<ALLOWANCES>                                        22
<INVENTORY>                                        610
<CURRENT-ASSETS>                                 2,011
<PP&E>                                          23,062
<DEPRECIATION>                                   9,268
<TOTAL-ASSETS>                                  17,334
<CURRENT-LIABILITIES>                            2,161
<BONDS>                                          4,821
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                      1,325
<COMMON>                                            66
<OTHER-SE>                                       3,678
<TOTAL-LIABILITY-AND-EQUITY>                    17,334
<SALES>                                          7,765
<TOTAL-REVENUES>                                 8,067
<CGS>                                            5,870
<TOTAL-COSTS>                                    5,870
<OTHER-EXPENSES>                                   172
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 375
<INCOME-PRETAX>                                    807
<INCOME-TAX>                                       332
<INCOME-CONTINUING>                                539
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                    (30)
<CHANGES>                                            0
<NET-INCOME>                                       509
<EPS-PRIMARY>                                     1.37
<EPS-DILUTED>                                     1.33