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Operating Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 28, 2021	Aug. 29, 2020
Segment Reporting Information
Net Sales:	$ 789.7	$ 626.8
Operating Earnings (Loss):	(52.8)	95.4
Intersegment Eliminations
Segment Reporting Information
Net Sales:	(3.6)	0.0
Americas Contract
Segment Reporting Information
Operating Earnings (Loss):	10.5	57.9
Americas Contract | Operating Segments
Segment Reporting Information
Net Sales:	325.3	370.1
International Contract
Segment Reporting Information
Operating Earnings (Loss):	11.3	16.2
International Contract | Operating Segments
Segment Reporting Information
Net Sales:	99.0	94.0
Global Retail
Segment Reporting Information
Operating Earnings (Loss):	27.8	31.5
Global Retail | Operating Segments
Segment Reporting Information
Net Sales:	212.6	162.7
Knoll
Segment Reporting Information
Operating Earnings (Loss):	(53.6)	0.0
Knoll | Operating Segments
Segment Reporting Information
Net Sales:	156.4	0.0
Corporate
Segment Reporting Information
Operating Earnings (Loss):	$ (48.8)	$ (10.2)

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