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CAPITAL MANAGEMENT (Tables) | 6 Months Ended
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Jun. 30, 2021
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.
| As of
US$ MILLIONS | June 30, 2021 |  | December 31, 2020
Partnership Capital | $ | 21,451 |  |  | $ | 21,673 |
Remove impact of the following items since inception: |  |  |
Non-controlling interest - in operating subsidiaries | (13,475) |  |  | (13,954) |
Deficit | 2,552 |  |  | 2,752 |
Accumulated other comprehensive income | (620) |  |  | (731) |
Ownership changes and other | (495) |  |  | (527) |
Invested Capital | $ | 9,413 |  |  | $ | 9,213 |
The following table presents the change in Invested Capital during the three and six-month periods ended June 30, 2021:
| For the three-month period ended June 30 |  | For the six-month period ended June 30
US$ MILLIONS | 2021 |  | 2020 |  | 2021 |  | 2020
Opening balance | $ | 9,410 |  |  | $ | 9,011 |  |  | $ | 9,213 |  |  | $ | 9,009 |
Issuance of preferred units | — |  |  | — |  |  | 194 |  |  | — |
Issuance of limited partnership units | 3 |  |  | 3 |  |  | 6 |  |  | 5 |
Ending balance | $ | 9,413 |  |  | $ | 9,014 |  |  | $ | 9,413 |  |  | $ | 9,014 |
Weighted Average Invested Capital | $ | 9,410 |  |  | $ | 9,011 |  |  | $ | 9,386 |  |  | $ | 9,010 |

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