<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Company's Form 10-Q for the quarterly period 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> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 350
<SECURITIES> 0
<RECEIVABLES> 701
<ALLOWANCES> 0
<INVENTORY> 85
<CURRENT-ASSETS> 1,585
<PP&E> 22,719
<DEPRECIATION> 6,338
<TOTAL-ASSETS> 20,883
<CURRENT-LIABILITIES> 3,348
<BONDS> 6,192
0
0
<COMMON> 17
<OTHER-SE> 16,748
<TOTAL-LIABILITY-AND-EQUITY> 20,883
<SALES> 7,790
<TOTAL-REVENUES> 10,653
<CGS> 6,478
<TOTAL-COSTS> 7,058
<OTHER-EXPENSES> (141)
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 318
<INCOME-PRETAX> 2,225
<INCOME-TAX> 700
<INCOME-CONTINUING> 1,525
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 1,525
<EPS-BASIC> 1.15
<EPS-DILUTED> 1.12
</TABLE>