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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventories [Abstract]  
Inventory Amounts by Product Type
Our inventory amounts by product type were as follows at the dates indicated:

 
 
December 31,
 
 
 
2021
   
2020
 
NGLs
 
$
2,026.6
   
$
1,888.1
 
Petrochemicals and refined products
   
343.0
     
642.6
 
Crude oil
   
285.4
     
758.1
 
Natural gas
   
26.0
     
14.7
 
Total
 
$
2,681.0
   
$
3,303.5
 
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,
 
 
2021
 
2020
 
2019
 
Cost of sales (1)
 
$
29,887.0
   
$
16,723.2
   
$
22,065.8
 
Lower of cost or net realizable value adjustments recognized in cost of sales
   
20.1
     
60.2
     
22.7
 

(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.