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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Details 5) (CAD) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Credit concentrations with respect to derivative instruments |  |
Period after which receivables are classified as past due | 30 days |
Derivative instruments |  |
Credit concentrations with respect to derivative instruments |  |
Maximum credit exposure with respect to derivative instruments | 815 | 807
Letters of credit provided in lieu of providing cash collateral to counterparties | 125 |
Cash collateral on asset exposure | 0 | 0
Derivative instruments | Canadian financial institutions |  |
Credit concentrations with respect to derivative instruments |  |
Maximum credit exposure with respect to derivative instruments | 304 | 306
Derivative instruments | United States financial institutions |  |
Credit concentrations with respect to derivative instruments |  |
Maximum credit exposure with respect to derivative instruments | 214 | 129
Derivative instruments | European financial institutions |  |
Credit concentrations with respect to derivative instruments |  |
Maximum credit exposure with respect to derivative instruments | 180 | 244
Derivative instruments | Other |  |
Credit concentrations with respect to derivative instruments |  |
Maximum credit exposure with respect to derivative instruments | 117 | 128

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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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 7 + 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=7491637&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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