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Restructuring and Integration Expense - Schedule of Severance and Employee Benefit Costs (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2024	Dec. 02, 2023	Nov. 30, 2024	Dec. 02, 2023	Jun. 01, 2024
Changes in Restructuring Liability Balance [Roll Forward]
Integration Costs	$ 0	$ 1,800,000	$ 0	$ 7,000,000.0
Knoll Integration
Changes in Restructuring Liability Balance [Roll Forward]
Integration Costs	0	6,900,000	28,300,000	10,800,000
2024 Restructuring Plan
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			10,000,000.0
Integration Costs			0		$ 30,800,000
Amounts Paid			(6,100,000)
Ending balance	3,900,000		3,900,000		10,000,000.0
Total \| Knoll Integration
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			700,000
Integration Costs			25,800,000
Amounts Paid			(6,800,000)
Non-cash costs			(19,000,000.0)
Ending balance	700,000		700,000		700,000
Severance and Employee Benefit \| Knoll Integration
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			0
Integration Costs			0
Amounts Paid			0
Non-cash costs			0
Ending balance	0		0		0
Severance and Employee Benefit \| 2024 Restructuring Plan
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			10,000,000.0
Integration Costs			0
Amounts Paid			(6,100,000)
Ending balance	3,900,000		3,900,000		10,000,000.0
Exit and Disposal Activities \| Knoll Integration
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			700,000
Integration Costs		$ 5,300,000	25,800,000	$ 8,700,000
Amounts Paid			(6,800,000)
Non-cash costs			(19,000,000.0)
Ending balance	700,000		700,000		700,000
Exit and Disposal Activities \| 2024 Restructuring Plan
Changes in Restructuring Liability Balance [Roll Forward]
Beginning balance			0
Integration Costs			0
Amounts Paid			0
Ending balance	$ 0		$ 0		$ 0