Inventories

6 Months Ended

Jun. 30, 2021

5. Inventories

At June 30, 2021 and December 31, 2020, inventory by major classification was as follows:


	June 30, 2021		December 31, 2020
Finished goods	$	797	$	758
Work in process	551		449
Raw materials	479		441
Materials and supplies	93		95
Total inventories	$	1,920	$	1,743

Beginning in the second quarter of 2020, the Motorparts segment initiated a rationalization of its supply chain and distribution network to achieve supply chain efficiencies and improve throughput to its customers. As a result, certain assets including inventory, real estate, and personal property will no longer be utilized. As part of Motorparts' on-going efforts related to this initiative, it recognized an additional non-cash charge of $44 million to write-down inventory to its net realizable value, an additional $1 million impairment charge to write-down property, plant and equipment, and $1 million and $3 million in restructuring charges related to cash severance benefits and other costs during the three and six months ended June 30, 2021.

During the three and six months ended June 30, 2020, the Motorparts segment recognized an $82 million non-cash charge to write-down inventory to its net realizable value, a $16 million impairment charge to write-down property, plant, and equipment to its fair value, a $9 million impairment charge to its operating lease right-of-use assets, and $4 million in restructuring charges related to cash severance benefits. Refer to Note 4, “Restructuring Charges, Net and Asset Impairments” for additional information.