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Inventories, Net of Inventory Reserves
6 Months Ended
Jun. 30, 2020
Inventories, Net of Inventory Reserves [Abstract]  
Inventories, Net of Inventory Reserves 9. Inventories, Net of Inventory Reserves

Inventories, net of inventory reserves comprise the following (in millions):

June 30,

December 31,

2020

2019

Finished goods

$

944

$

973

Work in process

408

421

Raw materials and accessories

436

481

Supplies and packing materials

447

445

Total inventories, net of inventory reserves

$

2,235

$

2,320