<ARTICLE> 5 <RESTATED> <MULTIPLIER> 1,000,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-30-1997 <CASH> 22 <SECURITIES> 2,177 <RECEIVABLES> 1,544 <ALLOWANCES> 20 <INVENTORY> 613 <CURRENT-ASSETS> 4,975 <PP&E> 20,741 <DEPRECIATION> 7,453 <TOTAL-ASSETS> 20,703 <CURRENT-LIABILITIES> 5,442 <BONDS> 4,406 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 3,140 <OTHER-SE> 2,866 <TOTAL-LIABILITY-AND-EQUITY> 20,703 <SALES> 0 <TOTAL-REVENUES> 9,136 <CGS> 0 <TOTAL-COSTS> 8,199 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 202 <INCOME-PRETAX> 761 <INCOME-TAX> 307 <INCOME-CONTINUING> 454 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 454 <EPS-PRIMARY> 2.50 <EPS-DILUTED> 2.45