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ACQUISITION OF BUSINESSES - Additional Information (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 04, 2017 | Sep. 30, 2016 | Dec. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Aug. 18, 2016 | Jul. 19, 2016 | Jun. 28, 2016 | Mar. 01, 2016
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Increase through business combinations, deferred tax liability |  |  |  | $ 930,000,000 | $ 234,000,000 |  |  |  |  |  |  |
Goodwill |  |  |  | 1,301,000,000 | 502,000,000 |  |  |  |  |  |  |
Revenues |  |  |  | 3,535,000,000 | 2,115,000,000 |  | $ 1,855,000,000 |  |  |  |  |
Net income (loss) |  |  |  | 574,000,000 | 528,000,000 | [1] | $ 391,000,000 | [1] |  |  |  |
Deferred income tax liability |  |  |  | 2,849,000,000 | 1,612,000,000 |  |  |  |  |  |  |
Brazilian regulated gas transmission operation |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary | 28.00% |  |  |  |  |  |  |  |  |  |  |
Consideration transferred | $ 1,568,000,000 |  |  |  |  |  |  |  |  |  |  |
Cash | 1,306,000,000 |  |  |  |  |  |  |  |  |  |  |
Deferred consideration | $ 262,000,000 |  |  |  |  |  |  |  |  |  |  |
Period of payable from close of transaction | 5 years |  |  |  |  |  |  |  |  |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  | 8,000,000 |  |  |  |  |  |  |  |
Increase through business combinations, deferred tax liability | $ 893,000,000 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 804,000,000 |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  | 938,000,000 |  |  |  |  |  |  |  |
Net income (loss) |  |  |  | 495,000,000 |  |  |  |  |  |  |  |
Brazilian regulated gas transmission operation | Consortium |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred | 5,100,000,000 |  |  |  |  |  |  |  |  |  |  |
Cash | 4,200,000,000 |  |  |  |  |  |  |  |  |  |  |
Deferred consideration | $ 900,000,000 |  |  |  |  |  |  |  |  |  |  |
Aggregated individually immaterial business combinations |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  | 27,000,000 |  |  |  |  |  |  |  |
Cash |  |  |  | 9,000,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  | 11,000,000 |  |  |  |  |  |  |  |
Revenues |  |  |  | 24,000,000 |  |  |  |  |  |  |  |
Net income (loss) |  |  |  | 4,000,000 |  |  |  |  |  |  |  |
Liabilities incurred |  |  |  | $ 18,000,000 |  |  |  |  |  |  |  |
Australian port operation |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  | $ 145,000,000 |  |  |
Cash |  |  |  |  |  |  |  |  | 13,000,000 |  |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  | 17,000,000 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | 199,000,000 |  |  |
Goodwill not deductible tax purposes |  |  |  |  |  |  |  |  | $ 0 |  |  |
Ownership interest |  |  | 20.00% |  |  |  |  |  |  |  |  |
Other income |  | $ 123,000,000 |  |  |  |  |  |  |  |  |  |
Reclassification adjustments on available-for-sale financial assets, net of tax |  | 44,000,000 |  |  |  |  |  |  |  |  |  |
Reclassification adjustments on exchange differences on translation, net of tax |  | $ 79,000,000 |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  | 27.00% |  |  |
Common shares of Asciano Limited |  |  |  |  |  |  |  |  | $ 132,000,000 |  |  |
Discount rate |  |  |  | 15.00% |  |  |  |  |  |  |  |
Terminal value multiple |  |  |  | 8.9 |  |  |  |  |  |  |  |
Discrete cash flow period |  |  |  | 10 years |  |  |  |  |  |  |  |
Australian port operation | Brookfield Consortium |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  |  | 63,000,000 |  |  |
Common shares of Asciano Limited |  |  |  |  |  |  |  |  | $ 442,000,000 |  |  |
North American gas storage operation |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  | $ 227,000,000 |  |
Business combinations, Pre-existing interest, Senior notes |  |  |  |  |  |  |  |  |  | 141,000,000 |  |
Cash |  |  |  |  |  |  |  |  |  | 67,000,000 |  |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  | 11,000,000 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  | 82,000,000 |  |
Goodwill not deductible tax purposes |  |  |  |  |  |  |  |  |  | $ 0 |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  | 40.00% |  |
Deferred income tax liability |  |  |  |  |  |  |  |  |  | $ 82,000,000 |  |
North American gas storage operation | Working Capital Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |  |  | $ 19,000,000 |  |
Peruvian toll roads |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  | $ 127,000,000 |
Cash |  |  |  |  |  |  |  |  |  |  | 118,000,000 |
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  | 1,000,000 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | 139,000,000 |
Goodwill not deductible tax purposes |  |  |  |  |  |  |  |  |  |  | $ 0 |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  | 17.00% |
Liabilities incurred |  |  |  |  | 9,000,000 |  |  |  |  |  | $ 9,000,000 |
Deferred income tax liability |  |  |  |  |  |  |  |  |  |  | 139,000,000 |
Peruvian toll roads | Brookfield Sponsored Infrastructure Fund |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Cash |  |  |  |  |  |  |  |  |  |  | 400,000,000 |
Liabilities incurred |  |  |  |  |  |  |  |  |  |  | $ 30,000,000 |
Indian toll roads |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  |  |  |  |  |  |  | $ 42,000,000
Cash |  |  |  |  |  |  |  |  |  |  |  | $ 42,000,000
Acquisition-related costs recognised as expense for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  |  | 40.00%
Deferred income tax assets |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000
Brazilian Regulated Gas Transmission Operation and other insignificant transactions |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |  |  |  |  |  |
Pro forma revenue |  |  |  | $ 3,911,000,000 |  |  |  |  |  |  |  |
Pro forma net income |  |  |  | $ 751,000,000 |  |  |  |  |  |  |  |
[1] | Certain net income allocations have been reclassified to provide comparability with the current year consolidated statements of partnership capital.

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