Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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- Definition

Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Acquisitions (Details Textual) CAD / shares in Units, CAD in Millions, $ in Millions	Nov. 30, 2016 CAD CAD / shares	Nov. 30, 2016 USD ($)	May 20, 2016 CAD CAD / shares	May 20, 2016 USD ($)	Oct. 28, 2016 USD ($)	May 20, 2016 USD ($)	Jan. 29, 2016 USD ($)	Oct. 30, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill					$ 1,034		$ 154	$ 154
RONA inc [Member]
Business Acquisition [Line Items]
Cash consideration			CAD 3,100	$ 2,367
Goodwill						$ 922
Current liabilities assumed						615
RONA inc [Member] \| Unsecured debentures [Member]
Business Acquisition [Line Items]
Current liabilities assumed			CAD 118			91
RONA inc [Member] \| Trademarks [Member]
Business Acquisition [Line Items]
Intangible assets acquired						203
Weighted average useful life			15 years	15 years
RONA inc [Member] \| Dealer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets acquired						$ 106
Weighted average useful life			20 years	20 years
RONA inc [Member] \| Common Class A [Member]
Business Acquisition [Line Items]
Business acquisition, share price \| CAD / shares			CAD 24
Subsequent Event [Member] \| RONA inc [Member]
Business Acquisition [Line Items]
Cash consideration	CAD 166	$ 122
Subsequent Event [Member] \| RONA inc [Member] \| Preferred Class A [Member]
Business Acquisition [Line Items]
Business acquisition, share price \| CAD / shares	CAD 24