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Acquisitions and Divestitures (Details) - USD ($) $ in Millions |  |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2018 | Jun. 07, 2018 | Jul. 31, 2017 | Jan. 01, 2017 | Sep. 01, 2018 | Mar. 03, 2018 | Sep. 02, 2017 | Jun. 02, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Payments to Acquire Intangible Assets |  |  |  |  | $ 4.8 |  | $ 0.0 |
Proceeds from sale of property and dealers |  |  |  |  | 0.0 |  | 2.0 |
MAARS [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase price | $ 6.1 |  |  |  |  |  |  |
Percentage of voting interests acquired | 48.00% |  |  |  |  |  |  |
Nine United Denmark A/S [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase price |  | $ 65.5 |  |  |  |  |  |
Percentage of voting interests acquired |  | 33.00% |  |  |  |  |  |
Payments to Acquire Intangible Assets |  | $ 4.8 |  |  |  |  |  |
CANADA | Wholly-owned contract furniture dealership [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
(Gain) loss on sales of property and dealers |  |  |  |  |  |  | $ 1.1 |
Proceeds from sale of property and dealers |  |  | $ 2.0 |  |  |  |  |
PENNSYLVANIA | Wholly-owned contract furniture dealership [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
(Gain) loss on sales of property and dealers |  |  |  |  |  | $ 0.7 |  |
Proceeds from sale of property and dealers |  |  |  | $ 3.0 |  |  |  |
Accounts and Notes Receivable, Net |  |  |  |  | $ 2.5 |  |  | $ 2.5

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