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OTHER LONG-TERM LIABILITIES (Details) - CAD CAD in Millions	Dec. 31, 2016	Dec. 31, 2015
OTHER LONG-TERM LIABILITIES
Regulatory liabilities	CAD 793	CAD 787
Derivative liabilities (Note 24)	2,713	3,950
Pension and OPEB liabilities (Note 26)	597	517
Asset retirement obligations (Note 19)	230	189
Environmental liabilities	76	89
Other	572	524
Other long-term liabilities	CAD 4,981	CAD 6,056

X

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are expected to be paid after one year (or the normal operating cycle, if longer), from the balance sheet date.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.

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