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Leased Facilities - Additional Information (Detail) (CAD) In Millions, unless otherwise specified	Dec. 31, 2014
Operating Leased Assets [Line Items]
Minimum undiscounted lease commitments	494us-gaap_OperatingLeasesFutureMinimumPaymentsDue	[1]
[1] Net rental cost under cancelable and non-cancelable operating leases incurred in 2014 was $315 million (2013 - $287 million, 2012 - $271 million). Related rental income was not material.

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- Details

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X

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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Period Type:	instant