<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND CONSOLIDATED STATEMENT OF INCOME FOUND ON THE
COMPANY'S 10-K FOR THE TWELVE MONTHS ENDED SEPTEMBER 30, 2000 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<CASH> 842
<SECURITIES> 0
<RECEIVABLES> 3,599
<ALLOWANCES> 0
<INVENTORY> 702
<CURRENT-ASSETS> 10,007
<PP&E> 19,202
<DEPRECIATION> 6,892
<TOTAL-ASSETS> 45,027
<CURRENT-LIABILITIES> 8,402
<BONDS> 6,959
0
0
<COMMON> 12,101
<OTHER-SE> 11,999
<TOTAL-LIABILITY-AND-EQUITY> 45,027
<SALES> 0
<TOTAL-REVENUES> 25,402
<CGS> 0
<TOTAL-COSTS> 22,158
<OTHER-EXPENSES> 160
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 558
<INCOME-PRETAX> 2,526
<INCOME-TAX> 1,606
<INCOME-CONTINUING> 920
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 920
<EPS-BASIC> 0.58
<EPS-DILUTED> 0.57
</TABLE>