Financial Instruments, Risk Management Activities, and Fair Values (Schedule of Marketable Debt and Equity Securities) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
May 25, 2025 |
May 26, 2024 |
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| Financial Instruments, Risk Management Activities, and Fair Values [Abstract] | ||
| Available for sale debt securities, Cost | $ 2.3 | $ 2.3 |
| Equity securities, Cost | 0.3 | 0.3 |
| Total, Cost | 2.6 | 2.6 |
| Available for sale debt securities, Fair Value | 2.3 | 2.3 |
| Equity securities, Fair Value | 4.9 | 4.6 |
| Total, Fair Value | 7.2 | 6.9 |
| Available for sale debt securities, Gross Unrealized Gains | 0.0 | 0.0 |
| Equity securities, Gross Unrealized Gains | 4.6 | 4.3 |
| Total, Gross Unrealized Gains | 4.6 | 4.3 |
| Available for sale debt securities, Gross Unrealized Losses | 0.0 | 0.0 |
| Equity securities, Gross Unrealized Losses | 0.0 | 0.0 |
| Total, Gross Unrealized Losses | $ 0.0 | $ 0.0 |
| X | ||||||||||
- Definition Amount of unrealized loss on investment in debt and equity securities. No definition available.
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| X | ||||||||||
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of unrealized gain (loss) on investment in debt and equity securities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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