Properties, Plants, and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2022

Property Plant And Equipment [Abstract]

Schedule of Properties, Plants, and Equipment, Net

December 31,	2022		2021
Land and land rights, including mines	$	253	$	264
Structures (by type of operation):
Bauxite mining		1,234		1,148
Alumina refining		2,281		2,400
Aluminum smelting and casting		3,265		3,298
Energy generation		354		339
Other		346		340
		7,480		7,525
Machinery and equipment (by type of operation):
Bauxite mining		569		565
Alumina refining		3,658		3,946
Aluminum smelting and casting		5,813		5,877
Energy generation		851		836
Other		461		452
		11,352		11,676
		19,085		19,465
Less: accumulated depreciation, depletion, and amortization		13,112		13,130
		5,973		6,335
Construction work-in-progress		520		288
	$	6,493	$	6,623