Segment Information (Tables)

6 Months Ended

Jun. 30, 2015

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
Second quarter ended June 30, 2015
Sales:
Third-party sales	$	924		$	1,534		$	1,668		$	1,733	$	5,859
Intersegment sales		431			562			34			—		1,027
Total sales	$	1,355		$	2,096		$	1,702		$	1,733	$	6,886
Profit and loss:
Equity loss	$	(11	)	$	(5	)	$	(7	)	$	—	$	(23	)
Depreciation, depletion, and amortization		77			109			56			64		306
Income taxes		87			6			25			99		217
After-tax operating income (ATOI)		215			67			76			210		568
Second quarter ended June 30, 2014
Sales:
Third-party sales	$	761		$	1,659		$	1,860		$	1,502	$	5,782
Intersegment sales		480			718			44			—		1,242
Total sales	$	1,241		$	2,377		$	1,904		$	1,502	$	7,024
Profit and loss:
Equity loss	$	(7	)	$	(17	)	$	(6	)	$	—	$	(30	)
Depreciation, depletion, and amortization		100			129			58			41		328
Income taxes		12			30			18			101		161
ATOI		38			97			70			202		407

	Alumina			Primary Metals			Global Rolled Products			Engineered Products and Solutions		Total
Six months ended June 30, 2015
Sales:
Third-party sales	$	1,811		$	3,106		$	3,289		$	3,422	$	11,628
Intersegment sales		932			1,254			70			—		2,256
Total sales	$	2,743		$	4,360		$	3,359		$	3,422	$	13,884
Profit and loss:
Equity loss	$	(18	)	$	(8	)	$	(16	)	$	—	$	(42	)
Depreciation, depletion, and amortization		157			218			112			124		611
Income taxes		179			63			61			189		492
ATOI		436			254			130			404		1,224
Six months ended June 30, 2014
Sales:
Third-party sales	$	1,606		$	3,083		$	3,537		$	2,945	$	11,171
Intersegment sales		990			1,452			87			—		2,529
Total sales	$	2,596		$	4,535		$	3,624		$	2,945	$	13,700
Profit and loss:
Equity loss	$	(12	)	$	(45	)	$	(11	)	$	—	$	(68	)
Depreciation, depletion, and amortization		197			253			116			81		647
Income taxes		52			19			47			191		309
ATOI		130			82			124			389		725

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:

	Second quarter ended June 30,						Six months ended June 30,
	2015			2014			2015			2014
Total segment ATOI	$	568		$	407		$	1,224		$	725
Unallocated amounts (net of tax):
Impact of LIFO		36			(8	)		43			(15	)
Metal price lag		(39	)		11			(62	)		18
Interest expense		(80	)		(69	)		(160	)		(147	)
Noncontrolling interests		(67	)		9			(127	)		28
Corporate expense		(66	)		(70	)		(130	)		(137	)
Restructuring and other charges		(159	)		(77	)		(320	)		(398	)
Other		(53	)		(65	)		(133	)		(114	)
Consolidated net income (loss) attributable to Alcoa	$	140		$	138		$	335		$	(40	)