Energy & Transportation sales (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Energy and transportation sales
Sales and revenues	$ 13,589	$ 11,887
Energy & Transportation
Energy and transportation sales
Sales and revenues	4,032	3,658
Energy & Transportation \| Oil And Gas Customer
Energy and transportation sales
Sales and revenues	948	915
Energy & Transportation \| Power generation
Energy and transportation sales
Sales and revenues	1,012	963
Energy & Transportation \| Industrial
Energy and transportation sales
Sales and revenues	1,020	813
Energy & Transportation \| Transportation
Energy and transportation sales
Sales and revenues	$ 1,052	$ 967

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details