<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS FOR THE PERIOD ENDED DECEMBER 31, 1999, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000

                                        
<PERIOD-TYPE>                              12-MOS
<FISCAL-YEAR-END>                                                  DEC-31-1999
<PERIOD-END>                                                       DEC-31-1999
<CASH>                                                                     214
<SECURITIES>                                                                 0
<RECEIVABLES>                                                              583
<ALLOWANCES>                                                                24
<INVENTORY>                                                                503
<CURRENT-ASSETS>                                                         1,688
<PP&E>                                                                  17,704
<DEPRECIATION>                                                           7,675
<TOTAL-ASSETS>                                                          14,125
<CURRENT-LIABILITIES>                                                    1,967
<BONDS>                                                                  4,395
<PREFERRED-MANDATORY>                                                        0
<PREFERRED>                                                                  0
<COMMON>                                                                    73
<OTHER-SE>                                                               3,450
<TOTAL-LIABILITY-AND-EQUITY>                                            14,125
<SALES>                                                                  7,610
<TOTAL-REVENUES>                                                         8,551
<CGS>                                                                    5,808
<TOTAL-COSTS>                                                            5,808
<OTHER-EXPENSES>                                                            75
<LOSS-PROVISION>                                                             0
<INTEREST-EXPENSE>                                                         498
<INCOME-PRETAX>                                                          1,100
<INCOME-TAX>                                                               631
<INCOME-CONTINUING>                                                        568
<DISCONTINUED>                                                               0
<EXTRAORDINARY>                                                          (107)
<CHANGES>                                                                 (13)
<NET-INCOME>                                                               448
<EPS-BASIC>                                                             1.24
<EPS-DILUTED>                                                             1.24