Goodwill and Indefinite-lived Intangibles (Details) - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2019	Jun. 01, 2019
Goodwill [Roll Forward]
Goodwill, beginning	$ 303.8
Foreign currency translation adjustments	0.1
Acquisition of naughtone	60.0
Goodwill, ending	363.9
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets (Excluding Goodwill), beginning	78.1
Foreign currency translation adjustments	0.0
Acquisition of naughtone	4.4
Indefinite-Lived Intangible Assets (Excluding Goodwill), ending	82.5
Rollforward of Goodwill and Indefinite-lived Intangible Assets [Roll Forward]
Goodwill and indefinite-lived intangibles, beginning	381.9
Foreign currency translation adjustments	0.1
Acquisition of naughtone	64.4
Goodwill and indefinite-lived intangibles, ending	446.4
Goodwill [Line Items]
Goodwill	363.9	$ 303.8
Indefinite-lived intangibles	82.5	78.1
Design Within Reach | Trade Names
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets (Excluding Goodwill), beginning	55.1
Goodwill [Line Items]
Indefinite-lived intangibles	55.1	55.1
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure		63.2
Indefinite-lived Intangible Asset, Amount of Fair Value in Excess of Carrying Amount		$ 8.1
Indefinite-lived Intangible Asset, Percentage of Fair Value in Excess of Carrying Amount		14.60%
Retail
Goodwill [Roll Forward]
Goodwill, beginning	249.9
Goodwill [Line Items]
Goodwill	$ 249.9	$ 249.9
Goodwill, Fair Value Disclosure		282.6
Reporting Unit, Amount of Fair Value in Excess of Carrying Amount		$ 32.7
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		13.00%