<ARTICLE> 5
<MULTIPLIER> 1,000,000
       
                                                                        
<PERIOD-TYPE>                   9-MOS                      YEAR                  
<FISCAL-YEAR-END>                          DEC-31-1996                DEC-31-1995
<PERIOD-START>                             JAN-01-1996                JAN-01-1995
<PERIOD-END>                               SEP-30-1996                DEC-31-1995
<CASH>                                              35                        305
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<ALLOWANCES>                                         0                          0
<INVENTORY>                                         25                         24
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<PP&E>                                           6,518                      6,272
<DEPRECIATION>                                   3,546                      3,431
<TOTAL-ASSETS>                                   5,233                      5,702
<CURRENT-LIABILITIES>                            1,222                      1,685
<BONDS>                                            584                        702
<PREFERRED-MANDATORY>                                0                          0
<PREFERRED>                                          0                          0
<COMMON>                                             0                          0
<OTHER-SE>                                       2,440                      2,243
<TOTAL-LIABILITY-AND-EQUITY>                     5,233                      5,702
<SALES>                                          1,997                      1,921
<TOTAL-REVENUES>                                 1,997                      1,921
<CGS>                                            1,487                      1,368
<TOTAL-COSTS>                                    1,487                      1,368
<OTHER-EXPENSES>                                   377                        474
<LOSS-PROVISION>                                     0                          0
<INTEREST-EXPENSE>                                  33                         65
<INCOME-PRETAX>                                    200                        195
<INCOME-TAX>                                        82                         31
<INCOME-CONTINUING>                                118                        164
<DISCONTINUED>                                       0                          0
<EXTRAORDINARY>                                    (1)                          0
<CHANGES>                                            0                          0
<NET-INCOME>                                       117                        164
<EPS-PRIMARY>                                        0                          0
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