Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	Nov. 30, 2025	May 31, 2025	Nov. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Assets held for sale	$ 350.7	$ 0.0	$ 0.0
Liabilities held for sale	18.5	$ 0.0	$ 0.0
Disposal Group, Held-for-Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid expenses and other current assets	1.4
Other assets and deferred charges	25.2
Total Assets held for sale	350.7
Deferred tax liabilities	18.5
Liabilities held for sale	18.5
Disposal Group, Held-for-Sale, Not Discontinued Operations | Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	72.5
Disposal Group, Held-for-Sale, Not Discontinued Operations | Building and Building Improvements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	251.4
Disposal Group, Held-for-Sale, Not Discontinued Operations | Equipment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	0.2
Disposal Group, Held-for-Sale, Not Discontinued Operations | SoHo Headquarters
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid expenses and other current assets	1.4
Other assets and deferred charges	25.2
Total Assets held for sale	335.2
Deferred tax liabilities	17.6
Liabilities held for sale	17.6
Disposal Group, Held-for-Sale, Not Discontinued Operations | SoHo Headquarters | Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	67.9
Disposal Group, Held-for-Sale, Not Discontinued Operations | SoHo Headquarters | Building and Building Improvements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	240.6
Disposal Group, Held-for-Sale, Not Discontinued Operations | SoHo Headquarters | Equipment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	0.1
Disposal Group, Held-for-Sale, Not Discontinued Operations | Jefferson City Distribution Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Prepaid expenses and other current assets	0.0
Other assets and deferred charges	0.0
Total Assets held for sale	15.5
Deferred tax liabilities	0.9
Liabilities held for sale	0.9
Disposal Group, Held-for-Sale, Not Discontinued Operations | Jefferson City Distribution Facility | Land
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	4.6
Disposal Group, Held-for-Sale, Not Discontinued Operations | Jefferson City Distribution Facility | Building and Building Improvements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	10.8
Disposal Group, Held-for-Sale, Not Discontinued Operations | Jefferson City Distribution Facility | Equipment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property, plant and equipment, current	$ 0.1