Inventories (Tables)	6 Months Ended
Jun. 30, 2020
Inventories [Abstract]
Inventories	Note 3—Inventories Inventories consisted of the following: Millions of Dollars June 30 December 31 2020 2019 Crude oil and natural gas $ 452 472 Materials and supplies 530 554 $ 982 1,026

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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