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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Disclosure of transactions between related parties [line items] |  |  |  |  |
Directors' fees (less than) | $ 1 | $ 1 | $ 1 | $ 1 |
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 | 52 | 57 | $ 108 | 105 |
Amounts payable, related party transactions | 52 |  | 52 |  | $ 64
Amounts payable, reimbursements | 2 |  | 2 |  | 0
Brookfield |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Deposit balance | 1 |  | 1 |  | 1
Earned interest on deposits | 1 | 1 | 1 | 1 |
Subsidiary and corporate borrowings | 0 |  | 0 |  | 0
Subsidiary of Common Parent (Brookfield) |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Services received, related party transactions | 1 | 1 | 1 | 1 |
Amounts payable, related party transactions | 73 |  | 73 |  | 75
Amounts receivable, related party transactions | $ 20 |  | $ 20 |  | 20
Subsidiary of Common Parent (Brookfield) | Top of range |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Amounts payable, related party transactions, interest rate | 8.50% |  | 8.50% |  |
Subsidiary of Common Parent (Brookfield) | Bottom of range |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Amounts payable, related party transactions, interest rate | 3.80% |  | 3.80% |  |
Subsidiary of Common Parent (Brookfield) | Brookfield Office Properties Inc. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Services received, related party transactions | $ 1 | 1 | $ 2 | 1 |
Revenue from rendering of services, related party transactions | 2 | 1 | 4 | 3 |
Subsidiary of Common Parent (Brookfield) | Brookfield Renewable Partners L.P. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Services received, related party transactions | 3 | 0 | 6 | 0 |
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 | 2 | $ 0 |
Revolving credit facility with Brookfield |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Credit facility, maximum borrowing capacity | 500 |  | 500 |  |
Subsidiary and corporate borrowings | $ 0 |  | $ 0 |  | $ 0

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