Segment Information (Tables)

3 Months Ended

Mar. 31, 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
First quarter ended March 31, 2015
Sales:
Third-party sales	$	887		$	1,572		$	1,621		$	1,689	$	5,769
Intersegment sales		501			692			36			—		1,229
Total sales	$	1,388		$	2,264		$	1,657		$	1,689	$	6,998
Profit and loss:
Equity loss	$	(7	)	$	(3	)	$	(9	)	$	—	$	(19	)
Depreciation, depletion, and amortization		80			109			56			60		305
Income taxes		92			57			26			89		264
After-tax operating income (ATOI)		221			187			34			191		633
First quarter ended March 31, 2014
Sales:
Third-party sales	$	845		$	1,424		$	1,677		$	1,443	$	5,389
Intersegment sales		510			734			43			—		1,287
Total sales	$	1,355		$	2,158		$	1,720		$	1,443	$	6,676
Profit and loss:
Equity loss	$	(5	)	$	(28	)	$	(5	)	$	—	$	(38	)
Depreciation, depletion, and amortization		97			124			58			40		319
Income taxes		40			(11	)		34			91		154
ATOI		92			(15	)		59			189		325

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:

	First quarter ended March 31,
	2015			2014
Total segment ATOI	$	633		$	325
Unallocated amounts (net of tax):
Impact of LIFO		7			(7	)
Interest expense		(80	)		(78	)
Noncontrolling interests		(60	)		19
Corporate expense		(64	)		(67	)
Restructuring and other charges		(161	)		(321	)
Other		(80	)		(49	)
Consolidated net income (loss) attributable to Alcoa	$	195		$	(178	)