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INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 859 | $ 820
Temporary differences associated with investments in subsidiaries, associates and joint ventures for which deferred tax liabilities have not been recognised | 2,411 | 2,230
Capital Losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 480 | 442
Non-Capital Losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 379 | 378
Non-Capital Losses | Expire between 2020 to 2030 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 7 | 5
Non-Capital Losses | Have no expiry dates |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 372 | 373
Indian toll roads |  |
Disclosure of detailed information about business combination [line items] |  |
Net deferred tax assets |  | $ 10

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- Definition The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Associates [member]; Subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_f&doctype=Standard -URIDate 2017-03-09 + Details
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