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Fair Value Measurements - Schedule of non-financial assets measured and recorded at fair value on a non-recurring basis (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairments and write downs	$ 0.0	$ 0.4	$ 11.1
Fair Value, Nonrecurring | Intangible assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	3.6
Asset impairments and write downs	0.0
Fair value of assets acquired	4.1
Fair Value, Nonrecurring | Goodwill
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	7.6
Asset impairments and write downs	0.0
Fair value of assets acquired	7.6
Fair Value, Nonrecurring | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		1.4
Asset impairments and write downs		9.3
Fair value of assets acquired		0.0
Fair Value, Nonrecurring | Inventories
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		2.3
Asset impairments and write downs		1.6
Fair value of assets acquired		0.0
Fair Value, Nonrecurring | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Asset impairments and write downs		0.7
Fair value of assets acquired		0.0
Fair Value, Nonrecurring | Operating lease right-of-use assets, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Asset impairments and write downs		0.4	9.6
Fair value of assets acquired		0.0
Fair Value, Nonrecurring | Right of Use Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			8.1
Fair value of assets acquired			0.0
Fair Value, Nonrecurring | Property, plant and equipment, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			0.0
Asset impairments and write downs			1.5
Fair value of assets acquired			0.0
Fair Value, Nonrecurring | Level 1 | Intangible assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	0.0
Fair Value, Nonrecurring | Level 1 | Goodwill
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	0.0
Fair Value, Nonrecurring | Level 1 | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 1 | Inventories
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 1 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 1 | Operating lease right-of-use assets, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 1 | Right of Use Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			0.0
Fair Value, Nonrecurring | Level 1 | Property, plant and equipment, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			0.0
Fair Value, Nonrecurring | Level 2 | Intangible assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	0.0
Fair Value, Nonrecurring | Level 2 | Goodwill
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	0.0
Fair Value, Nonrecurring | Level 2 | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 2 | Inventories
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 2 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 2 | Operating lease right-of-use assets, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 2 | Right of Use Asset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			0.0
Fair Value, Nonrecurring | Level 2 | Property, plant and equipment, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			0.0
Fair Value, Nonrecurring | Level 3 | Intangible assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	4.1
Fair Value, Nonrecurring | Level 3 | Goodwill
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV	$ 7.6
Fair Value, Nonrecurring | Level 3 | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		1.4
Fair Value, Nonrecurring | Level 3 | Inventories
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		2.3
Fair Value, Nonrecurring | Level 3 | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		0.0
Fair Value, Nonrecurring | Level 3 | Operating lease right-of-use assets, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV		$ 0.0	9.1
Fair Value, Nonrecurring | Level 3 | Property, plant and equipment, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, FV			$ 0.0

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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