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INVENTORIES INVENTORIES (Notes)

12 Months Ended

Dec. 31, 2019

Disclosure of inventories [Abstract]

Disclosure of inventories [text block]

INVENTORIES



	Gold						Copper
	As at December 31, 2019			As at December 31, 2018			As at December 31, 2019			As at December 31, 2018
Raw materials
Ore in stockpiles		$2,794			$2,106			$155			$151
Ore on leach pads	507			405			—			—
Mine operating supplies	617			496			52			66
Work in process	141			146			—			—
Finished products	220			176			103			2
		$4,279			$3,329			$310			$219
Non-current ore in stockpiles¹	(2,300		)	(1,696		)	—			—
		$1,979			$1,633			$310			$219


¹	Ore that we do not expect to process in the next 12 months is classified within other long-term assets.



Inventory Impairment Charges
For the years ended December 31	2019			2018
Pierina		$12			$4
Carlin	6			—
Cortez	4			—
Golden Sunlight	4			10
Lagunas Norte	—			166
Lumwana	—			18
Porgera	—			1
Inventory impairment charges¹		$26			$199


¹	Impairment charges in 2018 primarily relate to stockpiles at Lagunas Norte (refer to note 21).



Ore in Stockpiles	As at December 31, 2019			As at December 31, 2018
Gold
Carlin		$1,136			$841
Pueblo Viejo	649			603
Turquoise Ridge	258			13
Cortez	174			242
Loulo-Gounkoto	167			—
North Mara	136			70
Lagunas Norte	73			49
Veladero	52			39
Buzwagi	47			83
Phoenix	39			—
Porgera	33			37
Tongon	29			—
Kalgoorlie	—			125
Other	1			4
Copper
Lumwana	155			151
		$2,949			$2,257

Ore on Leach pads	As at December 31, 2019			As at December 31, 2018
Gold
Lagunas Norte		$148			$168
Veladero	123			138
Carlin	64			—
Cortez	50			81
Phoenix	44			—
Long Canyon	43			—
Turquoise Ridge	33			—
Pierina	2			18
		$507			$405

Purchase Commitments

At December 31, 2019, we had purchase obligations for supplies and consumables of approximately $1,681 million (2018: $1,972 million).