Income taxes (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

Income before income taxes

Income before income taxes	U.S.		Non-U.S.		Total
2011	$	1,791	$	1,164	$	2,955
2010	3,769		782		4,551
2009	1,375		642		2,017

Provision (benefit) for income taxes

Provision (benefit) for income taxes	U.S. Federal			Non-U.S.			U.S. State			Total
2011:
Current	$	692		$	138		$	8		$	838
Deferred	(154		)	24			11			(119		)
Total	$	538		$	162		$	19		$	719
2010:
Current	$	1,401		$	92		$	18		$	1,511
Deferred	(188		)	(2		)	2			(188		)
Total	$	1,213		$	90		$	20		$	1,323
2009:
Current	$	318		$	79		$	4		$	401
Deferred	124			23			(1		)	146
Total	$	442		$	102		$	3		$	547

Principal reconciling items from income tax computed at statutory federal rate

Principal reconciling items from income tax computed at the statutory federal rate follow:

	2011			2010			2009
Computed tax at statutory rate	$	1,034		$	1,593		$	706
Non-U.S. effective tax rates	(245		)	(184		)	(123		)
U.S. R&D tax credit	(58		)	(54		)	(28		)
U.S. tax benefit for manufacturing	(31		)	(63		)	(21		)
Other	19			31			13
Total provision for income taxes	$	719		$	1,323		$	547

Primary components of deferred income tax assets and liabilities

The primary components of deferred income tax assets and liabilities were as follows:

	December 31,
	2011			2010
Deferred income tax assets:
Inventories and related reserves	$	913		$	525
Postretirement benefit costs recognized in AOCI	431			404
Deferred loss and tax credit carryforwards	400			220
Stock-based compensation	357			357
Accrued expenses	323			251
Other	217			208
	2,641			1,965
Less valuation allowance	(178		)	(3		)
	2,463			1,962
Deferred income tax liabilities:
Acquisition-related intangibles and fair-value adjustments	(1,096		)	(21		)
Accrued retirement costs (defined benefit and retiree health care)	(180		)	(190		)
Property, plant and equipment	(147		)	(83		)
International earnings	(92		)	(26		)
Other	(60		)	(31		)
	(1,575		)	(351		)
Net deferred income tax asset	$	888		$	1,611

Summary of income tax contingencies

The changes in the total amounts of uncertain tax positions are summarized as follows:

	2011			2010			2009
Balance, January 1	$	103		$	56		$	148
Additions based on tax positions related to the current year	15			12			10
Additions from the acquisition of National	132			—			—
Additions for tax positions of prior years	3			50			6
Reductions for tax positions of prior years	(39		)	(12		)	(18		)
Settlements with tax authorities	(4		)	(3		)	(90		)
Balance, December 31	$	210		$	103		$	56
Interest income (expense) recognized in the year ended December 31	$	1		$	(2	)	$	—
Accrued interest payable (receivable) as of December 31	$	3		$	(5	)	$	(9	)