CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
CONSOLIDATED CONDENSED BALANCE SHEETS
Accumulated depreciation, depletion and amortization	$ 41,212	$ 39,419
Common stock, outstanding shares	891,807,415	891,360,091
Treasury stock, shares	127,881,155	127,681,335