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Revenue from Contracts with Customers - Revenue Disaggregated By Product Type And Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2019	Sep. 01, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 670.9	$ 624.6
North America Contract:
Disaggregation of Revenue [Line Items]
Net sales	458.4	421.0
North America Contract: | Systems
Disaggregation of Revenue [Line Items]
Net sales	147.3	146.1
North America Contract: | Seating
Disaggregation of Revenue [Line Items]
Net sales	130.2	125.6
North America Contract: | Freestanding and storage
Disaggregation of Revenue [Line Items]
Net sales	112.3	87.6
North America Contract: | Textiles
Disaggregation of Revenue [Line Items]
Net sales	29.8	28.8
North America Contract: | Other
Disaggregation of Revenue [Line Items]
Net sales	38.8	32.9
International Contract:
Disaggregation of Revenue [Line Items]
Net sales	113.9	115.4
International Contract: | Systems
Disaggregation of Revenue [Line Items]
Net sales	24.0	22.8
International Contract: | Seating
Disaggregation of Revenue [Line Items]
Net sales	61.2	68.7
International Contract: | Freestanding and storage
Disaggregation of Revenue [Line Items]
Net sales	14.7	10.4
International Contract: | Other
Disaggregation of Revenue [Line Items]
Net sales	14.0	13.5
Retail:
Disaggregation of Revenue [Line Items]
Net sales	98.6	88.2
Retail: | Seating
Disaggregation of Revenue [Line Items]
Net sales	60.7	53.7
Retail: | Freestanding and storage
Disaggregation of Revenue [Line Items]
Net sales	17.0	17.2
Retail: | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 20.9	$ 17.3

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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.

+ References

No definition available.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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