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Fair Value of Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2025 USD ($) | Feb. 28, 2025 USD ($) | Feb. 28, 2026 USD ($) | Feb. 28, 2025 USD ($) vote | Feb. 29, 2024 USD ($) | May 31, 2025 USD ($) | May 31, 2024 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Long-term debt, including current portion |  | $ 10,691.0 | $ 10,296.5 | $ 10,691.0 |  |  |
Asset impairment and related expenses |  |  | 109.8 | 478.0 | $ 0.0 |  |
Goodwill impairment |  |  |  | $ 2,740.7 |  |  |
Number of reporting units | vote |  |  |  | 2 |  |  |
Equity method investments impairment |  |  | $ 1.5 | $ 8.7 | 136.1 |  |
Measurement Input Royalty Rate | Valuation Technique Relief from Royalty Method | Held for sale brands trademark unit |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input |  |  | 0.03 |  |  |  |
Measurement Input Royalty Rate | Valuation Technique Relief from Royalty Method | Remaining brands trademark unit |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input |  |  | 0.07 |  |  |  |
Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input | 0.09 |  | 0.10 |  |  |  |
Measurement Input, Discount Rate | Valuation Technique Relief from Royalty Method |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input |  |  | 0.11 |  |  |  |
Measurement Input, Long-Term Revenue Growth Rate | Valuation Technique, Discounted Cash Flow |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input |  |  | 0.015 |  |  |  |
Measurement Input, Long-Term Revenue Growth Rate | Valuation Technique Relief from Royalty Method |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Measurement Input |  |  | 0.015 |  |  |  |
Trademarks |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Trademarks, carrying value |  | 2,517.1 | $ 2,519.1 | 2,517.1 |  |  |
Canopy equity method investment |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Equity method investments, carrying value |  |  |  |  |  |  | $ 266.2
Equity method investments, fair value |  |  |  |  |  |  | $ 142.7
Equity method investments impairment |  |  |  | 123.5 |  |  |
Operating Segments | Wine and Spirits |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Goodwill impairment | $ 2,250.0 |  |  | 2,740.7 |  |  |
Operating Segments | Wine and Spirits | Disposal Group, Not Discontinued Operations |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Asset held for sale, carrying value |  | 913.5 |  | 913.5 |  |  |
Operating Segments | Wine and Spirits | Trademarks |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Trademarks, carrying value |  | 182.8 |  | 182.8 |  |  |
Trademarks, estimated fair value |  | 125.8 |  | 125.8 |  |  |
Impairment of trademarks |  |  |  | $ 57.0 |  |  |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Goodwill and intangible assets impairment |  |  |
Nonrecurring |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Asset impairment and related expenses |  |  | 52.1 | $ 478.0 |  |  |
Goodwill impairment |  |  |  | 2,740.7 |  |  |
Equity method investments impairment |  |  | 1.5 | 8.7 | $ 136.1 |  |
Nonrecurring | Trademarks |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment of trademarks |  |  |  | 57.0 |  |  |
Nonrecurring | Operating Segments | Wine and Spirits |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  | 490.7 |  |  |  |  |
Nonrecurring | Operating Segments | Wine and Spirits | Disposal Group, Not Discontinued Operations | 2025 Wine Divestitures |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Assets held for sale, estimated fair value |  |  |  |  |  | $ 897.7 |
Asset impairment and related expenses |  |  | 52.1 |  |  |  |
Nonrecurring | Operating Segments | Wine and Spirits | Disposal Group, Not Discontinued Operations | 2025 Wine Divestitures Transaction |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Assets held for sale, estimated fair value |  |  | 879.8 |  |  |  |
Asset held for sale, carrying value |  |  | 1,357.8 |  |  |  |
Loss on dismantling and abandonment of long-lived assets |  |  | 478.0 |  |  |  |
Carrying amount |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Long-term debt, including current portion |  | 10,691.0 | 10,296.5 | 10,691.0 |  |  |
Fair value |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Long-term debt, including current portion |  | $ 9,999.0 | $ 9,858.2 | $ 9,999.0 |  |  |

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