Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Change in Accounting Principle [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	Three Months Ended March 31, 2013							Three Months Ended March 31, 2012
	As reported		As reported under LIFO		Change: (Decrease)/Increase			As reported		As reported under LIFO		Change: (Decrease)/Increase
Cost of goods sold and other operating charges	$	7,105	$	7,116	$	(11	)	$	6,816	$	6,822	$	(6	)
Income from continuing operations before income taxes	1,774		1,763		11			1,801		1,795		6
Provision for income taxes on continuing operations	387		384		3			392		392		—
Income from continuing operations after income taxes	1,387		1,379		8			1,409		1,403		6
Income from discontinued operations after income taxes	1,968		1,968		—			95		97		(2		)
Net income	$	3,355	$	3,347	$	8		$	1,504	$	1,500	$	4