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RISK MANAGEMENT AND FINANCIAL INSTRUMENTS - EFFECTS OF DERIVATIVE INSTRUMENTS ON STATEMENT OF EARNINGS AND COMPREHENSIVE INCOME (Details) - CAD CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | CAD (484) | CAD (1,128)
Amount of gains/(loss) reclassified from AOCI to earnings (effective portion) | 119 | 106
De-designation of qualifying hedges in connection with the Canadian Restructuring Plan (Note 1) | 338 |
Amount of gains/(loss) reclassified from AOCI to earnings (ineffective portion and amount excluded from effectiveness testing) | 26 | 210
Total unrealized derivative fair value gains/(loss) | CAD (2,373) | 96
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 |
Non-Qualifying Derivative Instruments |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | CAD (2,373) | 106
Cash Flow Hedges. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Estimated amount of AOCI related to cash flow hedges reclassified to earnings in the next 12 months | CAD 71 |
Period to hedge exposures to the variability of cash flows for all forecasted transactions | 48 months |
Foreign Exchange Risk | Other income/(expense) |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of gains/(loss) reclassified from AOCI to earnings (effective portion) | CAD 9 | 8
Foreign Exchange Risk | Non-Qualifying Derivative Instruments |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (2,187) | (936)
Foreign Exchange Risk | Non-Qualifying Derivative Instruments | Transportation and other services revenues |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (1,383) | (496)
Foreign Exchange Risk | Non-Qualifying Derivative Instruments | Other income/(expense) |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (804) | (440)
Foreign Exchange Risk | Cash Flow Hedges. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | 77 | 8
Foreign Exchange Risk | Net Investment Hedges |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | (248) | (113)
Interest rate contracts | Interest expense. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of gains/(loss) reclassified from AOCI to earnings (effective portion) | 128 | 101
De-designation of qualifying hedges in connection with the Canadian Restructuring Plan (Note 1) | 338 |
Amount of gains/(loss) reclassified from AOCI to earnings (ineffective portion and amount excluded from effectiveness testing) | 21 | 216
Interest rate contracts | Non-Qualifying Derivative Instruments |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (363) | 4
Interest rate contracts | Cash Flow Hedges. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | (275) | (1,086)
Commodity contracts | Commodity costs |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of gains/(loss) reclassified from AOCI to earnings (effective portion) | (46) | 4
Amount of gains/(loss) reclassified from AOCI to earnings (ineffective portion and amount excluded from effectiveness testing) | 5 | (6)
Commodity contracts | Non-Qualifying Derivative Instruments |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | 199 | 1,031
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity sales |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (226) | 0
Commodity contracts | Non-Qualifying Derivative Instruments | Commodity costs |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | 99 | 303
Commodity contracts | Non-Qualifying Derivative Instruments | Operating and administrative expense |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (2) | (13)
Commodity contracts | Non-Qualifying Derivative Instruments | Transportation and other services revenues |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | 328 | 741
Commodity contracts | Cash Flow Hedges. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | 9 | 50
Other contracts | Operating and administrative expense |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of gains/(loss) reclassified from AOCI to earnings (effective portion) | 28 | (7)
Other contracts | Non-Qualifying Derivative Instruments |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Total unrealized derivative fair value gains/(loss) | (22) | 7
Other contracts | Cash Flow Hedges. |  |
The Effect of Derivative Instruments on the Statements of Earnings and Comprehensive Income |  |
Amount of unrealized gains/(loss) recognized in OCI | CAD (47) | CAD 13

X
- Definition The dedesignation of qualifying hedges reclassified from accumulated other comprehensive income into income on derivative instruments qualifying as hedging instruments. + References No definition available. + Details
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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 The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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