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Fair Value of Financial Instruments - Additional Information (Details) - USD ($) $ in Millions | Jun. 29, 2025 | Dec. 29, 2024 | Jun. 30, 2024
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Short-term investments | $ 0.0 | $ 0.0 | $ 483.0
Carrying Cost | 3,339.8 | 3,401.8 | 3,984.9
6.05% Notes Due 2034 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Carrying Cost | 500.0 | 500.0 | 500.0
Fair Value, Recurring |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Available-for-sale securities | 10.8 | $ 0.6 | 0.8
Short-term investments |  |  | $ 483.0
Fair Value, Recurring | US Treasury Securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Short-term investments | $ 10.0 |  |

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