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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of transactions between related parties [line items] |  |  |
Directors' fees (less than) | $ 1 | $ 1 | $ 1
Asset management fee as percent per quarter | 0.3125% |  |
Asset management fee, percent | 1.25% |  |
Service Provider |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Asset management fee as percent per quarter | 0.3125% |  |
Asset management fee, percent | 1.25% |  |
Services received, related party transactions | $ 214 | 230 | 158
Amounts payable, related party transactions | 51 | 64 |
Subsidiary of Common Parent (Brookfield) |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Services received, related party transactions | 1 | 1 | 1
Amounts payable, related party transactions | 73 | 75 |
Amounts receivable, related party transactions | $ 20 | 20 |
Subsidiary of Common Parent (Brookfield) | Bottom of range |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Amounts payable, related party transactions, interest rate | 8.50% |  |
Subsidiary of Common Parent (Brookfield) | Top of range |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Amounts payable, related party transactions, interest rate | 3.80% |  |
Subsidiary of Common Parent (Brookfield) | Brookfield Office Properties Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Services received, related party transactions | $ 5 | 4 | 1
Revenue from rendering of services, related party transactions | 16 | 8 | 1
Subsidiary of Common Parent (Brookfield) | Brookfield Renewable Partners L.P. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Services received, related party transactions | 11 | 0 |
Revenue from sale of goods, related party transactions | 1 | 0 |
Brookfield |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Deposit balance | 1 | 1 |
Earned interest on deposits | 1 | 1 | $ 1
Credit facility, maximum borrowing capacity | 500 |  |
Non-recourse borrowings | 0 | 0 |
U.K. port operation | Subsidiary of Common Parent (Brookfield) | Brookfield Business Partners LP |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Revenue from sale of goods, related party transactions | 4 | 2 |
Australian port operation | Subsidiary of Common Parent (Brookfield) | Brookfield Business Partners LP |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Revenue from sale of goods, related party transactions | $ 1 | $ 0 |

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