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Fair Value of Financial Instruments - Fair values of other financial instruments (Details) - 0.625% Convertible Senior Notes (2025 Notes) - USD ($) $ in Millions | Oct. 02, 2021 | Jan. 02, 2021 | Jun. 01, 2020
--- | --- | --- | ---
Fair values of other financial instruments |  |  |
Interest rate (as a percent) | 0.625% | 0.625% | 0.625%
Fair value of debt | $ 690.2 | $ 671.4 |

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