<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> YEAR
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JAN-01-1999
<PERIOD-END> DEC-31-1999
<CASH> 398,695
<SECURITIES> 0
<RECEIVABLES> 255,664
<ALLOWANCES> 1,126
<INVENTORY> 258,864
<CURRENT-ASSETS> 957,359
<PP&E> 12,533,413
<DEPRECIATION> 411,079
<TOTAL-ASSETS> 15,534,221
<CURRENT-LIABILITIES> 1,772,847
<BONDS> 7,439,308
358,840
118,054
<COMMON> 64,130
<OTHER-SE> 3,004,347
<TOTAL-LIABILITY-AND-EQUITY> 15,534,221
<SALES> 0
<TOTAL-REVENUES> 1,398,008
<CGS> 0
<TOTAL-COSTS> 768,101
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 375,529
<INCOME-PRETAX> 103,705
<INCOME-TAX> (40,412)
<INCOME-CONTINUING> 144,117
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> (13,840)
<NET-INCOME> 130,277
<EPS-BASIC> 0
<EPS-DILUTED> 0
</TABLE>