<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM EDISON
MISSION ENERGY AND SUBSIDIARIES FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 832,720
<SECURITIES> 0
<RECEIVABLES> 487,961
<ALLOWANCES> 1,126
<INVENTORY> 294,323
<CURRENT-ASSETS> 1,976,565
<PP&E> 10,347,046
<DEPRECIATION> 632,376
<TOTAL-ASSETS> 14,479,282
<CURRENT-LIABILITIES> 1,928,812
<BONDS> 6,533,053
311,680
118,054
<COMMON> 64,130
<OTHER-SE> 2,872,977
<TOTAL-LIABILITY-AND-EQUITY> 14,479,282
<SALES> 0
<TOTAL-REVENUES> 2,313,562
<CGS> 0
<TOTAL-COSTS> 1,413,463
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 555,815
<INCOME-PRETAX> 253,288
<INCOME-TAX> 110,692
<INCOME-CONTINUING> 142,596
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 17,690
<NET-INCOME> 160,286
<EPS-BASIC> 0
<EPS-DILUTED> 0
</TABLE>