Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

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		Transportation and Construction Solutions		Total
First quarter ended March 31, 2016
Sales:
Third-party sales	$	545		$	1,123		$	1,397		$	1,449	$	429	$	4,943
Intersegment sales		292			475			29			—		—		796
Total sales	$	837		$	1,598		$	1,426		$	1,449	$	429	$	5,739
Profit and loss:
Equity (loss) income	$	(14	)	$	4		$	(11	)	$	—	$	—	$	(21	)
Depreciation, depletion, and amortization		63			102			56			65		11		297
Income taxes		5			(16	)		34			78		14		115
After-tax operating income (ATOI)		8			14			68			162		39		291
First quarter ended March 31, 2015
Sales:
Third-party sales	$	887		$	1,572		$	1,621		$	1,257	$	471	$	5,808
Intersegment sales		501			692			36			—		—		1,229
Total sales	$	1,388		$	2,264		$	1,657		$	1,257	$	471	$	7,037
Profit and loss:
Equity loss	$	(7	)	$	(3	)	$	(9	)	$	—	$	—	$	(19	)
Depreciation, depletion, and amortization		80			109			56			51		10		306
Income taxes		92			57			36			76		14		275
ATOI		221			187			54			156		38		656

Schedule of Segment ATOI to Consolidated Net Income Attributable to Alcoa

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

	First quarter ended March 31,
	2016			2015
Total segment ATOI	$	291		$	656
Unallocated amounts (net of tax):
Impact of LIFO		4			7
Metal price lag		1			(23	)
Interest expense		(83	)		(80	)
Noncontrolling interests		5			(60	)

	First quarter ended March 31,
	2016			2015
Corporate expense		(55	)		(62	)
Restructuring and other charges		(61	)		(161	)
Other		(86	)		(82	)
Consolidated net income attributable to Alcoa	$	16		$	195