<ARTICLE> 5
<MULTIPLIER> 1,000,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             APR-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                             167
<SECURITIES>                                         0
<RECEIVABLES>                                     3000
<ALLOWANCES>                                        15
<INVENTORY>                                       2892
<CURRENT-ASSETS>                                  6656
<PP&E>                                           29909
<DEPRECIATION>                                   17163
<TOTAL-ASSETS>                                   23783
<CURRENT-LIABILITIES>                             4701
<BONDS>                                           3830
<PREFERRED-MANDATORY>                              183
<PREFERRED>                                          2
<COMMON>                                           401<F1>
<OTHER-SE>                                        6980
<TOTAL-LIABILITY-AND-EQUITY>                     23783
<SALES>                                          10432
<TOTAL-REVENUES>                                 10488
<CGS>                                             7848
<TOTAL-COSTS>                                     9516
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  92
<INCOME-PRETAX>                                    677
<INCOME-TAX>                                       254
<INCOME-CONTINUING>                                423
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       423
<EPS-BASIC>                                          0<F2>
<EPS-DILUTED>                                        0<F3>
<FN>
<F1>Consists of Marathon Stock issued, $312 million; Steel Stock issued $89
million.
<F2>Basic Earning Per Share applicable to Marathon Stock, $1.18; Steel Stock, $.62
<F3>Diluted Earnings Per Share applicable to Marathon Stock, $1.18; Steel Stock,
$.62
</FN>