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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, 2026 | May 31, 2025 | May 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset impairments and write downs | $ 10.9 | $ 2.9 | $ 10.0
Additions | 0.0 | 85.3 |
Fair Value, Nonrecurring | Inventory |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 |
Asset impairments and write downs | 0.6 | 1.1 |
Fair value of assets acquired | 0.0 | 0.0 |
Fair Value, Nonrecurring | Prepublication assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 | 0.0
Asset impairments and write downs | 4.3 | 1.2 | 3.0
Fair value of assets acquired | 0.0 | 0.0 | 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 | 0.0
Asset impairments and write downs |  | 0.6 | 3.9
Fair value of assets acquired |  | 0.0 | 0.0
Fair Value, Nonrecurring | Intangible assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV |  |  | 5.5
Asset impairments and write downs |  |  | 3.1
Fair value of assets acquired |  |  | 6.0
Fair Value, Nonrecurring | Other Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value of assets acquired | 0.0 |  |
Non cash write off related to assets held for sale | 1.1 |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 0.0 |  |
Fair Value, Nonrecurring | Investment in Film and Television Programs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 |  |
Asset impairments and write downs | 4.9 |  |
Fair value of assets acquired | 0.0 |  |
Fair Value, Nonrecurring | Level 1 | Inventory |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 |
Fair Value, Nonrecurring | Level 1 | Prepublication assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 | 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 | 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 | Other Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 0.0 |  |
Fair Value, Nonrecurring | Level 1 | Investment in Film and Television Programs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 |  |
Fair Value, Nonrecurring | Level 2 | Inventory |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 |
Fair Value, Nonrecurring | Level 2 | Prepublication assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 | 0.0 | 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 | 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 | Other Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 0.0 |  |
Fair Value, Nonrecurring | Level 2 | Investment in Film and Television Programs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.0 |  |
Fair Value, Nonrecurring | Level 3 | Inventory |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 0.6 | 1.1 |
Fair Value, Nonrecurring | Level 3 | Prepublication assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | 4.3 | 1.2 | 3.0
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 |  | $ 0.6 | 3.9
Fair Value, Nonrecurring | Level 3 | Intangible assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV |  |  | $ 6.0
Fair Value, Nonrecurring | Level 3 | Other Assets |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure | 1.1 |  |
Fair Value, Nonrecurring | Level 3 | Investment in Film and Television Programs |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets, FV | $ 4.9 |  |

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