Properties, Plants, and Equipment, Net

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Properties, Plants, and Equipment, Net

H. Properties, Plants, and Equipment, Net

December 31,	2015		2014
Land and land rights, including mines*	$	481	$	548
Structures:
Alumina:
Alumina refining		2,387		2,750
Bauxite mining		1,054		1,403
Primary Metals:
Aluminum smelting		3,567		3,725
Power generation		518		645
Global Rolled Products		1,298		1,276
Engineered Products and Solutions*		658		547
Transportation and Construction Solutions		239		239
Other		619		715
		10,340		11,300
Machinery and equipment:
Alumina:
Alumina refining		3,709		4,165
Bauxite mining		428		524
Primary Metals:
Aluminum smelting		6,831		7,210
Power generation		1,044		1,080
Global Rolled Products		5,372		5,333
Engineered Products and Solutions*		2,745		2,402
Transportation and Construction Solutions		682		669
Other		750		820
		21,561		22,203
Less: accumulated depreciation, depletion, and amortization		32,382 18,872		34,051 19,091
Construction work-in-progress*		13,510 1,305		14,960 1,466
	$	14,815	$	16,426

* As of December 31, 2015 and 2014, these line items include amounts related to the acquisitions of Firth Rixson, TITAL, and/or RTI (see Note F).

As of December 31, 2015 and 2014, the net carrying value of temporarily idled smelting assets was $324 and $419, representing 778 kmt and 665 kmt of idle capacity, respectively. Also, as of December 31, 2015 and 2014, the net carrying value of temporarily idled refining assets was $53 and $62, representing 2,801 kmt and 1,216 kmt of idle capacity, respectively.