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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - LIQUIDITY AND CREDIT RISK (Details) - CAD CAD in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
LIQUIDITY RISK AND CREDIT RISK |  |
Rolling time period over which the Company forecasts cash requirements | 12 months |
Period of anticipated requirements for which the Company maintains sufficient liquidity through committed credit facilities | 1 year |
Period after which receivables are classified as past due | 30 days |
Derivative instruments |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | CAD 487 | CAD 809
Letters of credit provided in lieu of providing cash collateral to counterparties | 160 |
Cash collateral on asset exposure | 0 | 17
Derivative instruments | Canadian financial institutions |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | 39 | 47
Derivative instruments | United States financial institutions |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | 179 | 450
Derivative instruments | European financial institutions |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | 106 | 95
Derivative instruments | Asian financial institutions |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | 1 | 4
Derivative instruments | Other |  |
LIQUIDITY RISK AND CREDIT RISK |  |
Maximum credit exposure with respect to derivative instruments | CAD 162 | CAD 213

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- Definition Represents the period of the entity's anticipated requirements which the entity can fund through committed credit facilities without having to access the capital markets. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.1) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),2) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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