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Intangible Assets and Goodwill - Narrative - Indefinite-lived Intangibles Excluding Goodwill, Impairment Test (Details) - Trademarks - Interface	12 Months Ended
	May. 02, 2015 USD ($) reporting_unit	May. 03, 2014 USD ($) reporting_unit
Indefinite-lived Intangible Assets [Line Items]
Number of reporting units with indefinite-lived intangible assets (excluding goodwill) where impairment test was performed | reporting_unit	1	1
Impairment of indefinite-lived intangible assets (excluding goodwill)	$ 0	$ 0
Percentage by which fair value exceeded carrying value	64.00%	117.00%

X

- Definition

Intangible Assets, Indefinite-lived (Excluding Goodwill), Impairment Test, Excess of Fair Value over Carrying Value, Percentage

+ References

No definition available.

+ Details

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X

- Definition

Number of Reporting Units, Indefinite-lived Intangible Assets Excluding Goodwill, Impairment Test Performed

+ References

No definition available.

+ Details

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X

- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 30



-Section 50



-Paragraph 3



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275

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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.

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