Net Loss per Share - Schedule of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Numerator:
Net loss	$ (54,452)	$ (51,893)	$ (138,255)	$ (199,876)
Denominator:
Weighted-average shares of common stock— basic for Class A and Class B (in shares)	270,443	258,753	267,958	256,046
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)	270,443	258,753	267,958	256,046
Net loss per share:
Basic (in dollars per share)	$ (0.20)	$ (0.20)	$ (0.52)	$ (0.78)
Diluted (in dollars per share)	$ (0.20)	$ (0.20)	$ (0.52)	$ (0.78)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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