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Direct Operating Costs (Tables)
 12 Months Ended
Dec. 31, 2021
Direct Operating Costs [Abstract]  
Disclosure Of Detailed Information On Operating Costs 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 4 — 
Other27 22 13 
Total$526 $527 $552