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Income Taxes - Altera Corp and Singapore Operations (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Taxes |  |  |
Transition Tax obligation | $ 21.3 |  |
Period for payment of transition tax | 8 years |  |
Altera case |  |  |
Income Taxes |  |  |
Discrete income tax expense | $ 27.2 |  |
Singapore |  |  |
Income Taxes |  |  |
Foreign income tax expense (benefit) | $ (1.5) | $ (5.4) | $ (11.0)
Income (loss) per diluted share (in dollars per share) | $ 0.03 | $ 0.12 | $ 0.25

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