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CAPITAL MANAGEMENT (Tables) | 6 Months Ended
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Jun. 30, 2019
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, 2019 |  | December 31, 2018
Partnership Capital | $ | 16,233 |  |  | $ | 14,668 |
Remove impact of the following items since inception: |  |  |
Non-controlling interest - in operating subsidiaries | (8,918 | ) |  | (7,303 | )
Deficit | 1,639 |  |  | 1,228 |
Accumulated other comprehensive income | (352 | ) |  | (328 | )
Ownership changes and other | (398 | ) |  | (109 | )
Invested Capital | $ | 8,204 |  |  | $ | 8,156 |
The following table presents the change in Invested Capital during the three and six-month periods ended June 30, 2019:
| For the three-month period ended June 30 |  | For the six-month period ended June 30
US$ MILLIONS | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Opening balance | $ | 8,202 |  |  | $ | 7,760 |  |  | $ | 8,156 |  |  | $ | 7,599 |
Issuance of preferred units and preferred shares, net of repurchases | — |  |  | — |  |  | 72 |  |  | 157 |
Issuances of limited partnership units and redeemable partnership units, net of repurchases | 2 |  |  | 4 |  |  | (24 | ) |  | 8 |
Ending balance | $ | 8,204 |  |  | $ | 7,764 |  |  | $ | 8,204 |  |  | $ | 7,764 |
Weighted Average Invested Capital | $ | 8,202 |  |  | $ | 7,760 |  |  | $ | 8,192 |  |  | $ | 7,738 |

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