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CAPITAL MANAGEMENT (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of Capital Management [Abstract]  
Schedule of invested capital We define Invested Capital as partnership capital removing the impact of the following items: non-controlling interest - in operating subsidiaries, retained earnings or deficit, accumulated other comprehensive income and ownership changes.
US$ MILLIONS20202019
Partnership Capital$21,673 $22,177 
Remove impact of the following items since inception:
Non-controlling interest - in operating subsidiaries(13,954)(14,113)
Deficit2,752 2,048 
Accumulated other comprehensive income(731)(705)
Ownership changes(527)(398)
Invested Capital$9,213 $9,009 
The following table presents the change in Invested Capital during year ended December 31, 2020:
US$ MILLIONS20202019
Opening balance$9,009 $8,156 
Issuance of preferred units and preferred shares, net of repurchases195 72 
Issuances of limited partnership units and redeemable partnership units, net of repurchases
9 781 
Ending balance$9,213 $9,009 
Weighted Average Invested Capital$9,067 $8,563