Net Loss per Share - Schedule of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Numerator:
Net loss	$ (104,097)	$ (68,518)	$ (83,803)	$ (147,983)
Denominator:
Weighted-average shares of common stock— basic for Class A and Class B (in shares)	267,872	256,160	266,742	254,659
Effect of dilutive securities (in shares)	0	0	0	0
Weighted-average shares of common stock— diluted for Class A and Class B (in shares)	267,872	256,160	266,742	254,659
Net loss per share:
Basic (in dollars per share)	$ (0.39)	$ (0.27)	$ (0.31)	$ (0.58)
Diluted (in dollars per share)	$ (0.39)	$ (0.27)	$ (0.31)	$ (0.58)