Income Taxes (Tables)

6 Months Ended

Jun. 30, 2011

Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Three months ended June 30,										Six months ended June 30,
Millions of dollars	2011					2010					2011					2010
Earnings (loss) before income taxes and other items	$	(370	)			$	207				$	(215	)			$	378
Income tax computed at United States statutory tax rate	$	(130	)	(35	)%	$	72		35	%	$	(75	)	(35	)%	$	132		35	%
U.S. government tax incentive - Energy Tax Credits	(79		)	(21	)%	(87		)	(42	)%	(133		)	(62	)%	(116		)	(31	)%
Foreign government tax incentive - BEFIEX	(28		)	(7	)%	(19		)	(9	)%	(39		)	(18	)%	(30		)	(8	)%
Other	31			7	%	26			12	%	17			8	%	3			1	%
Income tax computed at effective worldwide tax rates	$	(206	)	(56	)%	$	(8	)	(4	)%	$	(230	)	(107	)%	$	(11	)	(3	)%