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Inventories
12 Months Ended
Dec. 31, 2019
Classes of current inventories [abstract]  
Disclosure of inventories [text block]

14 Inventories

At 31 December
(in USD million)20192018
Crude oil2,1371,173
Petroleum products572345
Natural gas277274
Other377351
Inventories3,3632,144

Other inventory consists mainly of drilling and well equipment.

The write-down of inventories from cost to net realisable value amounted to an expense of USD 147 million and USD 164 million in 2019 and 2018, respectively.