Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	Aug. 09, 2018	Apr. 04, 2021	Mar. 29, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on investments		$ 44.7	$ 47.9
Enphase Shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Shares issuable to the Company at closing of agreement	7,500,000
Investment shares sold (in shares)			1,000,000
Proceeds from sale of equity investment			$ 43.7