Investments (Tables)

6 Months Ended

Jun. 30, 2016

Investments Schedule [Abstract]

Summary of Unaudited Financial Information for Alcoa's Equity Investments

A summary of unaudited financial information for Alcoa’s equity investments is as follows (amounts represent 100% of investee financial information):

	Second quarter ended June 30,					Six months ended June 30,
	2016		2015			2016		2015
Sales	$	904	$	971		$	1,796	$	1,857
Cost of goods sold		679		862			1,360		1,557
Net income (loss)		14		(45	)		29		(86	)