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DIRECT OPERATING COSTS
12 Months Ended
Dec. 31, 2021
Direct Operating Costs [Abstract]  
DIRECT OPERATING COSTS DIRECT OPERATING COSTS
Direct operating costs are costs incurred to earn revenue and include all attributable expenses. The following table lists direct operating costs for the years ended December 31, 2021, 2020 and 2019. Comparative figures have been reclassified to conform to the current period’s presentation:
US$ MILLIONS202120202019
Depreciation and amortization$236 $283 $308 
Transportation and distribution162 145 153 
Operations and maintenance49 39 38 
Compensation44 34 40 
Cost of inventory8 — 
Other27 22 13 
Total$526 $527 $552