v3.22.0.1

Properties, Plants, and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, net	$ 2,651	$ 2,712
Properties, plants, and equipment, excluding construction work-in-progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	7,360	7,307
Less: accumulated depreciation and amortization	4,878	4,697
Properties, plants, and equipment, net	2,482	2,610
Land and land rights
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	22	23
Structures
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,505	1,493
Structures | Operating Segments | Rolled Products
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,107	1,095
Structures | Operating Segments | Building and Construction Systems
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	96	95
Structures | Operating Segments | Extrusions
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	150	150
Structures | Other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	152	153
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,833	5,791
Machinery and equipment | Operating Segments | Rolled Products
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,816	4,787
Machinery and equipment | Operating Segments | Building and Construction Systems
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	203	205
Machinery and equipment | Operating Segments | Extrusions
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	523	520
Machinery and equipment | Other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	291	279
Construction work-in-progress
Property, Plant and Equipment [Line Items]
Properties, plants, and equipment, net	$ 169	$ 102

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