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CAPITAL MANAGEMENT - Invested Capital (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of objectives, policies and processes for managing capital [line items] |  |  |  |
Total partnership capital | $ 21,673 | $ 22,177 | $ 14,668 | $ 13,474
Non-controlling interest - in operating subsidiaries | (13,954) | (14,113) |  |
Deficit | 2,752 | 2,048 |  |
Accumulated other comprehensive income | (731) | (705) |  |
Ownership changes | (527) | (398) |  |
Invested Capital | $ 9,213 | $ 9,009 | $ 8,156 |
Bottom of range |  |  |  |
Disclosure of objectives, policies and processes for managing capital [line items] |  |  |  |
Targeted returns on invested capital | 12.00% |  |  |
Top of range |  |  |  |
Disclosure of objectives, policies and processes for managing capital [line items] |  |  |  |
Targeted returns on invested capital | 15.00% |  |  |

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