Loss per Share - Other Narrative (Details) - $ / shares shares in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2019	May 02, 2020
Earnings Per Share [Abstract]
Conversion price of convertible senior notes (in dollars per share)	$ 25.78	$ 25.78
Warrants outstanding (in shares)	11.6	11.6
Strike price of warrants (in dollars per share)	$ 46.88	$ 46.88