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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS (Details 2) (CAD) In Millions, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (831) | (1,047)
Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (776) | (178)
Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (78) | (959)
Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 23 | 90
Accounts receivable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 411 | 383
Current derivative assets, Amounts Available for Offset | (164) | (138)
Total current derivative assets | 247 | 245
Accounts receivable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 300 | 344
Accounts receivable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 98 | 23
Accounts receivable and other | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 13 | 16
Deferred amounts and other assets |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 463 | 408
Long-term derivative assets, Amounts Available for Offset | (153) | (97)
Total long-term derivative assets | 310 | 311
Deferred amounts and other assets | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 118 | 297
Deferred amounts and other assets | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 306 | 32
Deferred amounts and other assets | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 39 | 79
Accounts payable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (667) | (1,075)
Current derivative liabilities, Amounts Available for Offset | 174 | 138
Total current derivative liabilities | (493) | (937)
Accounts payable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (293) | (394)
Accounts payable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (374) | (681)
Other long-term liabilities |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (1,038) | (763)
Long-term derivative liabilities, Amounts Available for Offset | 143 | 97
Total long-term derivative liabilities | (895) | (666)
Other long-term liabilities | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (901) | (425)
Other long-term liabilities | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (108) | (333)
Other long-term liabilities | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (29) | (5)
Foreign exchange contracts |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (353) | 371
Foreign exchange contracts | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (389) | 312
Foreign exchange contracts | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 13 | (31)
Foreign exchange contracts | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 23 | 90
Foreign exchange contracts | Accounts receivable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 99 | 230
Current derivative assets, Amounts Available for Offset | (63) | (101)
Total current derivative assets | 36 | 129
Foreign exchange contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 73 | 210
Foreign exchange contracts | Accounts receivable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 13 | 4
Foreign exchange contracts | Accounts receivable and other | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 13 | 16
Foreign exchange contracts | Deferred amounts and other assets |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 95 | 315
Long-term derivative assets, Amounts Available for Offset | (75) | (40)
Total long-term derivative assets | 20 | 275
Foreign exchange contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 48 | 225
Foreign exchange contracts | Deferred amounts and other assets | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 8 | 11
Foreign exchange contracts | Deferred amounts and other assets | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 39 | 79
Foreign exchange contracts | Accounts payable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (101) | (105)
Current derivative liabilities, Amounts Available for Offset | 63 | 101
Total current derivative liabilities | (38) | (4)
Foreign exchange contracts | Accounts payable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (99) | (100)
Foreign exchange contracts | Accounts payable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (2) | (5)
Foreign exchange contracts | Other long-term liabilities |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (446) | (69)
Long-term derivative liabilities, Amounts Available for Offset | 75 | 40
Total long-term derivative liabilities | (371) | (29)
Foreign exchange contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (411) | (23)
Foreign exchange contracts | Other long-term liabilities | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (6) | (41)
Foreign exchange contracts | Other long-term liabilities | Derivative Instruments used as Net Investment Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (29) | (5)
Interest rate contracts |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (112) | (932)
Interest rate contracts | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 1 | 6
Interest rate contracts | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (113) | (938)
Interest rate contracts | Accounts receivable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 79 | 16
Current derivative assets, Amounts Available for Offset | (10) | (9)
Total current derivative assets | 69 | 7
Interest rate contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 10 | 9
Interest rate contracts | Accounts receivable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 69 | 7
Interest rate contracts | Deferred amounts and other assets |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 290 | 30
Long-term derivative assets, Amounts Available for Offset | (41) | (25)
Total long-term derivative assets | 249 | 5
Interest rate contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 5 | 12
Interest rate contracts | Deferred amounts and other assets | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 285 | 18
Interest rate contracts | Accounts payable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (373) | (673)
Current derivative liabilities, Amounts Available for Offset | 20 | 9
Total current derivative liabilities | (353) | (664)
Interest rate contracts | Accounts payable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (7) |
Interest rate contracts | Accounts payable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (366) | (673)
Interest rate contracts | Other long-term liabilities |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (108) | (305)
Long-term derivative liabilities, Amounts Available for Offset | 31 | 25
Total long-term derivative liabilities | (77) | (280)
Interest rate contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (7) | (15)
Interest rate contracts | Other long-term liabilities | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (101) | (290)
Commodity contracts |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (381) | (498)
Commodity contracts | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | (399) | (503)
Commodity contracts | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 18 | 5
Commodity contracts | Accounts receivable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 222 | 128
Current derivative assets, Amounts Available for Offset | (91) | (28)
Total current derivative assets | 131 | 100
Commodity contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 208 | 119
Commodity contracts | Accounts receivable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 14 | 9
Commodity contracts | Deferred amounts and other assets |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 74 | 60
Long-term derivative assets, Amounts Available for Offset | (37) | (32)
Total long-term derivative assets | 37 | 28
Commodity contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 63 | 59
Commodity contracts | Deferred amounts and other assets | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 11 | 1
Commodity contracts | Accounts payable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (193) | (297)
Current derivative liabilities, Amounts Available for Offset | 91 | 28
Total current derivative liabilities | (102) | (269)
Commodity contracts | Accounts payable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (187) | (294)
Commodity contracts | Accounts payable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative liabilities, Total Gross Derivative Instruments | (6) | (3)
Commodity contracts | Other long-term liabilities |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (484) | (389)
Long-term derivative liabilities, Amounts Available for Offset | 37 | 32
Total long-term derivative liabilities | (447) | (357)
Commodity contracts | Other long-term liabilities | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (483) | (387)
Commodity contracts | Other long-term liabilities | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative liabilities, Total Gross Derivative Instruments | (1) | (2)
Other contracts |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 15 | 12
Other contracts | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 11 | 7
Other contracts | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Total net financial asset/(liability) | 4 | 5
Other contracts | Accounts receivable and other |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 11 | 9
Total current derivative assets | 11 | 9
Other contracts | Accounts receivable and other | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 9 | 6
Other contracts | Accounts receivable and other | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Current derivative assets, Total Gross Derivative Instruments | 2 | 3
Other contracts | Deferred amounts and other assets |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 4 | 3
Total long-term derivative assets | 4 | 3
Other contracts | Deferred amounts and other assets | Non-Qualifying Derivative Instruments |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 2 | 1
Other contracts | Deferred amounts and other assets | Derivative Instruments used as Cash Flow Hedges | Designated as hedging instrument |  |
TOTAL DERIVATIVE INSTRUMENTS |  |
Long-term derivative assets, Total Gross Derivative Instruments | 2 | 2

X
- Definition This is the amount available for offset which represents what we can offset under current guidance but as a policy have chosen not to offset, related to current derivative asset. Offset amounts are determined using criteria such as events of bankruptcy or other significant credit event. + References No definition available. + Details
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- Definition This is the amount available for offset which represents what we can offset under current guidance but as a policy have chosen not to offset, related to noncurrent derivative asset. Offset amounts are determined using criteria such as events of bankruptcy or other significant credit event. + References No definition available. + Details
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- Definition Represents the fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and which is expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition Represents the fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and which is expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer. + References No definition available. + Details
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- Definition This is the amount available for offset which represents what we can offset under current guidance but as a policy have chosen not to offset, related to current derivative liability. Offset amounts are determined using criteria such as events of bankruptcy or other significant credit event. + References No definition available. + Details
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- Definition Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13495-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 4 -Chapter 3 -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. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10A, 10B -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. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 4, 17 -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. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Assets -URI http://asc.fasb.org/extlink&oid=6509628 + Details
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