Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Inventories [Abstract]

Inventory Amounts by Product Type

Our inventory amounts by product type were as follows at the dates indicated:

	December 31,
	2023		2022
NGLs	$	2,392	$	1,689
Petrochemicals and refined products		536		430
Crude oil		419		411
Natural gas		5		24
Total	$	3,352	$	2,554

Cost of Sales and Lower of Cost or Market Adjustments

The following table presents our total cost of sales amounts and lower of cost or net realizable value adjustments for the years indicated:

	For the Year Ended December 31,
	2023			2022			2021
Cost of sales (1)		$	37,023		$	45,836		$	29,887
Lower of cost or net realizable value adjustments recognized in cost of sales			31			19			20

(1) Cost of sales is a component of “Operating costs and expenses,” as presented on our Statements of Consolidated Operations.  Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.