Inventories

3 Months Ended

Mar. 31, 2022

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventory by major classification was as follows:

	March 31, 2022		December 31, 2021
Finished goods	$	840	$	747
Work in process	595		508
Raw materials	538		510
Materials and supplies	76		81
Total inventories	$	2,049	$	1,846