Properties, Plants, and Equipment, Net - Schedule of Properties, Plants, and Equipment, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	$ 10,789	$ 10,747
Less: accumulated depreciation and amortization	6,073	6,143
Properties, plants, and equipment excluding construction work-in-progress	4,716	4,604
Construction work-in-progress	783	821
Properties, plants, and equipment, net	5,499	5,425
Land and Land Rights [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	135	149
Structures [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	2,296	2,229
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	8,358	8,369
Operating Segments [Member] | Global Rolled Products [Member] | Structures [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	1,061	1,042
Operating Segments [Member] | Global Rolled Products [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	4,570	4,500
Operating Segments [Member] | Engineered Products and Solutions [Member] | Structures [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	733	658
Operating Segments [Member] | Engineered Products and Solutions [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	2,728	2,745
Operating Segments [Member] | Transportation and Construction Solutions [Member] | Structures [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	254	239
Operating Segments [Member] | Transportation and Construction Solutions [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	723	682
Other [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, net	308	279
Other [Member] | Structures [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	248	290
Other [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, gross	$ 337	$ 442