Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Schedule of Operating Results of Alcoa's Reportable Segments

The operating results of Alcoa’s reportable segments were as follows (differences between segment totals and consolidated totals are in Corporate):

	Alumina			Primary Metals			Global Rolled Products			Engineered Products and Solutions		Total
Third quarter ended September 30, 2013
Sales:
Third-party sales	$	846		$	1,600		$	1,805		$	1,437	$	5,688
Intersegment sales		513			691			47			—		1,251
Total sales	$	1,359		$	2,291		$	1,852		$	1,437	$	6,939
Profit and loss:
Equity loss	$	(2	)	$	(13	)	$	(3	)	$	—	$	(18	)
Depreciation, depletion, and amortization		100			131			56			40		327
Income taxes		17			(16	)		32			91		124
ATOI		67			8			71			192		338
Third quarter ended September 30, 2012
Sales:
Third-party sales	$	764		$	1,794		$	1,849		$	1,367	$	5,774
Intersegment sales		575			691			42			—		1,308
Total sales	$	1,339		$	2,485		$	1,891		$	1,367	$	7,082
Profit and loss:
Equity income (loss)	$	2		$	(5	)	$	(1	)	$	—	$	(4	)
Depreciation, depletion, and amortization		120			130			57			39		346
Income taxes		(22	)		(19	)		39			77		75
ATOI		(9	)		(14	)		89			158		224

	Alumina			Primary Metals			Global Rolled Products			Engineered Products and Solutions		Total
Nine months ended September 30, 2013
Sales:
Third-party sales	$	2,494		$	4,978		$	5,461		$	4,328	$	17,261
Intersegment sales		1,689			2,095			141			—		3,925
Total sales	$	4,183		$	7,073		$	5,602		$	4,328	$	21,186
Profit and loss:
Equity loss	$	(2	)	$	(29	)	$	(9	)	$	—	$	(40	)
Depreciation, depletion, and amortization		324			398			168			119		1,009
Income taxes		45			(40	)		103			269		377
ATOI		189			15			231			558		993
Nine months ended September 30, 2012
Sales:
Third-party sales	$	2,289		$	5,542		$	5,607		$	4,177	$	17,615
Intersegment sales		1,768			2,234			130			—		4,132
Total sales	$	4,057		$	7,776		$	5,737		$	4,177	$	21,747
Profit and loss:
Equity income (loss)	$	4		$	(16	)	$	(4	)	$	—	$	(16	)
Depreciation, depletion, and amortization		348			398			171			118		1,035
Income taxes		(29	)		(51	)		124			226		270
ATOI		49			(7	)		269			472		783

Schedule of Segment ATOI to Consolidated Net Income (Loss) Attributable to Alcoa

The following table reconciles total segment ATOI to consolidated net income (loss) attributable to Alcoa:

	Third quarter ended September 30,						Nine months ended September 30,
	2013			2012			2013			2012
Total segment ATOI	$	338		$	224		$	993		$	783
Unallocated amounts (net of tax):
Impact of LIFO		9			(7	)		12			12
Interest expense		(70	)		(81	)		(221	)		(241	)
Noncontrolling interests		(20	)		32			(12	)		44
Corporate expense		(74	)		(62	)		(212	)		(195	)
Restructuring and other charges		(108	)		(2	)		(324	)		(19	)
Other		(51	)		(247	)		(182	)		(435	)
Consolidated net income (loss) attributable to Alcoa	$	24		$	(143	)	$	54		$	(51	)