Inventories (Tables)

9 Months Ended

Sep. 30, 2021

Inventory Disclosure [Abstract]

Schedule of Inventory Components

	September 30, 2021		December 31, 2020
Finished goods	$	377	$	321
Work-in-process		194		112
Bauxite and alumina		460		412
Purchased raw materials		495		377
Operating supplies		176		176
	$	1,702	$	1,398