Percentage of additional units granted by Company based on the amount elected by participant.

No definition available.

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- Definition

The total grant date fair value of equity settled awards determined by using valuation models.

+ References

No definition available.

+ Details

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- Definition

The weighted average fair value at grant date for outstanding equity-based awards other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

No definition available.

+ Details

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- Definition

A roll forward of the weighted-average grant date fair value of equity settled awards.

+ References

No definition available.

+ Details

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- Definition

The stock-based compensation liability outstanding related to deferred share units.

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested Number Modification

+ References

No definition available.

+ Details

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- Definition

The number of units settled during the period.

+ References

No definition available.

+ Details

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- Definition

The weighted-average grant date fair value of units settled during the period.

+ References

No definition available.

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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Period Type:	duration

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

+ Details

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

+ Details

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

+ Details

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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

Net number of non-option equity instruments granted to participants.

+ References

+ Details

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of employees affected by the modification of an equity-based compensation plan.

+ References

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

+ References

No definition available.

+ Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Stock-based compensation (VIDP) (Details 5) - Voluntary Incentive Deferral Plan [Member] CAD / shares in Units, CAD in Millions	12 Months Ended
	Dec. 31, 2015 CAD CAD / shares shares	Dec. 31, 2014 CAD CAD / shares shares	Dec. 31, 2013 CAD
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
The number of years in the plan period over which the additional units will vest	4 years
Deferred share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's additional grant percentage of elected amount	25.00%
Incremental compensation cost from modification VIDP \| CAD		CAD 0.0
Equity settled awards \| Deferred share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested during the period VIDP \| CAD	CAD 1.0	CAD 1.0
Roll forward of the activity of deferred share units outstanding
Outstanding units at beginning of period	1,700,000
Granted	0
Vested	100,000
Settled	0
Outstanding units at end of period	1,800,000	1,700,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Grant Date Fair Value [Roll Forward]
Weighted-average grant date fair value outstanding units beginning of period \| CAD / shares	CAD 76.29
Weighted-average grant date fair value units granted DSUs \| CAD / shares	81.18
Weighted-average grant date fair value units vested during the year DSUs \| CAD / shares	77.23
Weighted-average grant date fair value of units settled during the period \| CAD / shares	76.38
Weighted-average grant date fair value outstanding units end of period \| CAD / shares	CAD 76.44	CAD 76.29
The grant date fair value of equity settled DSUs \| CAD	CAD 2.0
Aggregate intrinsic value of equity settled DSUs outstanding \| CAD	132.0
Cash settled awards \| Deferred share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of cash settled DSUs modified to equity settled awards		1,700,000
Number of employees affected by modification to VIDP plan		104
Fair value of awards vested during the period VIDP \| CAD	CAD 0.0	CAD 0.0	CAD 1.0
Roll forward of the activity of deferred share units outstanding
Outstanding units at beginning of period	500,000
Granted	0
Vested	0
Settled	(100,000)
Outstanding units at end of period	400,000	500,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding Weighted Average Grant Date Fair Value [Roll Forward]
Stock-based compensation liability outstanding DSUs \| CAD	CAD 36.0	CAD 40.0
Stock price end of period \| CAD / shares	CAD 77.35