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Restructuring and Integration Expense - Schedule of Restructuring Expenses by Segment (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2024 | Dec. 02, 2023 | Nov. 30, 2024 | Dec. 02, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | $ 0 | $ 1,800,000 | $ 0 | $ 7,000,000.0
Americas Contract |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 0 | 0 | 4,300,000
International Contract & Specialty |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 800,000 | 0 | 1,500,000
Global Retail |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 1,000,000.0 | 0 | 1,200,000
Knoll Integration |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 6,900,000 | 28,300,000 | 10,800,000
Knoll Integration | Corporate |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 0 | 0 | 100,000
Knoll Integration | Americas Contract | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 6,400,000 | 22,500,000 | 9,500,000
Knoll Integration | International Contract & Specialty | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | 0 | 500,000 | 5,500,000 | 1,200,000
Knoll Integration | Global Retail | Operating Segments |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring expense | $ 0 | $ 0 | $ 300,000 | $ 0

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