XML 160 R112.htm IDEA: XBRL DOCUMENT
v3.8.0.1

INVENTORIES - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Inventories [Abstract] |  |
Purchase obligation for supplies and consumables | $ 1,147 | $ 970

X
- Definition Inventories [Abstract] + References No definition available. + Details
Name: | abx_InventoriesAbstract
Namespace Prefix: | abx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase obligation1 + References No definition available. + Details
Name: | abx_PurchaseObligation1
Namespace Prefix: | abx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant