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Inventory
12 Months Ended
Dec. 31, 2022
Inventories [Abstract]  
Inventory Inventory
 
2022

2021
Product inventory
$611 

$535 
Materials, supplies and other
1,204 

1,013 
 
$1,815 $1,548 
During 2022, approximately $33 billion of purchased and produced inventory was recorded as expense (2021 - approximately $22 billion