Introduction (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Aug. 05, 2019	May 06, 2019	Sep. 28, 2019	Jun. 29, 2019
Subsidiary, Sale of Stock [Line Items]
Underwriting discounts and commissions		$ 19.4
IPO
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		11,068,750
Sale of stock, price per share (in dollars per share)	$ 160.00	$ 25.00
Proceeds from IPO, net		$ 252.4
Sale of stock, issuance costs		$ 4.9
Number of common stock shares converted		41,562,111
Number of shares issued for each share of convertible preferred stock converted (in shares)		1
Secondary Public Offering
Subsidiary, Sale of Stock [Line Items]
Proceeds from IPO, net	$ 37.5
Underwriting discounts and commissions	1.5
Sale of stock, issuance costs	$ 1.0
Selling stockholders sold (in shares)	3,487,500
Over-allotment option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	487,500	1,443,750
Selling stockholders sold (in shares)	250,000
Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of common stock shares converted				41,562,111
Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Number of common stock shares converted			250,000	11,068,750
Number of shares able to purchase		160,767