Net Income Per Share Attributable to Common Stockholders - Antidilutive Securities (Details) - shares	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	9,479,520	22,564,357
Stock options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	5,838,942	17,074,467
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	3,529,909	5,489,890
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially antidilutive securities (in shares)	110,669	0