Segment Information (Tables)

6 Months Ended

Jun. 30, 2011

Segment Information

Schedule Of Operating Results Of Reportable Segments

	Alumina		Primary Metals			Flat- Rolled Products		Engineered Products and Solutions		Total
Second quarter ended June 30, 2011
Sales:
Third-party sales	$	926	$	2,145		$	2,085	$	1,370	$	6,526
Intersegment sales		723		922			62		—		1,707
Total sales	$	1,649	$	3,067		$	2,147	$	1,370	$	8,233
Profit and loss:
Equity income (loss)	$	22	$	(1	)	$	—	$	—	$	21
Depreciation, depletion, and amortization		112		142			60		41		355
Income taxes		60		55			35		72		222
After-tax operating income (ATOI)		186		201			99		149		635
Second quarter ended June 30, 2010
Sales:
Third-party sales	$	701	$	1,710		$	1,574	$	1,122	$	5,107
Intersegment sales		530		693			40		—		1,263
Total sales	$	1,231	$	2,403		$	1,614	$	1,122	$	6,370
Profit and loss:
Equity income	$	4	$	1		$	—	$	—	$	5
Depreciation, depletion, and amortization		107		142			57		38		344
Income taxes		41		—			28		48		117
ATOI		94		109			71		107		381

Schedule Of Reconciliation Of Total Segment ATOI To Consolidated Net Income (Loss)

	Second quarter ended June  30,						Six months ended June 30,
	2011			2010			2011			2010
Total segment ATOI	$	635		$	381		$	1,190		$	687
Unallocated amounts (net of tax):
Impact of LIFO		(27	)		(3	)		(51	)		(17	)
Interest expense		(106	)		(77	)		(178	)		(154	)
Noncontrolling interests		(55	)		(34	)		(113	)		(56	)
Corporate expense		(76	)		(59	)		(143	)		(126	)
Restructuring and other charges		(22	)		(21	)		(28	)		(143	)
Discontinued operations		(4	)		(1	)		(5	)		(8	)
Other		(23	)		(50	)		(42	)		(248	)
Consolidated net income (loss) attributable to Alcoa	$	322		$	136		$	630		$	(65	)

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	June 30,		December 31,
	2011		2010
Alumina	$	10,560	$	9,967
Primary Metals		12,749		11,947
Flat-Rolled Products		5,248		4,606
Engineered Products and Solutions		5,995		5,434
Total segment assets	$	34,552	$	31,954