ACCOUNTS RECEIVABLE AND OTHER (Details) - Special Purpose Entity CAD in Millions, $ in Millions	6 Months Ended
Jun. 30, 2015 USD ($)	Jun. 30, 2015 CAD	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CAD
Accounts receivable and other
Trade and accrued receivables	$ 341	CAD 425	$ 378	CAD 439
Percentage of ownership in SPE, which has access to receivable owned by SPE	100.00%	100.00%
Maximum
Accounts receivable and other
Accumulated purchases, net of collections	$ 450

Represents the percentage of ownership in SPE, which has availability receivable owned by SPE.

No definition available.

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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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- Definition

Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Subparagraph a, b

-Article 5

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for the purchase of all receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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Balance Type:	credit
Period Type:	duration

- Details

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- Details

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