INVENTORY, NET

12 Months Ended

Dec. 31, 2021

Inventories [Abstract]

INVENTORY, NET

INVENTORY, NET

(US$ MILLIONS)	2021		2020
Raw materials and consumables	$	245	$	254
Work in progress	139		119
Finished goods and other	196		340
Carrying amount of inventories	$	580	$	713

The amount of inventory written down was as follows:

(US$ MILLIONS)	2021		2020		2019
Inventory obsolescence provision - beginning	$	12	$	20	$	19
Add: increase in provision	2		3		2
Deduct: inventory obsolescence write off	(4)		(12)		(1)
Impact of foreign exchange	—		1		—
Inventory obsolescence provision - ending	$	10	$	12	$	20