Fair Value Measurements - Class L Ordinary Shares Liability (Details) - Level 3 - Class L ordinary shares liability	3 Months Ended	6 Months Ended
	Mar. 31, 2021 USD ($) Y item	Dec. 31, 2020 USD ($) Y item
Summary of the changes in fair value, measured on a recurring basis
Fair value, beginning balance	$ 90,540,000	$ 0
Initial measurement on September 2, 2020		0
Change in fair value	(21,650,000)	90,540,000
Fair value, ending balance	$ 68,890,000	$ 90,540,000
Risk-free rate
Summary of the changes in fair value, measured on a recurring basis
Ordinary shares, measurement inputs | item	0.0181	0.0101
Remaining term in years
Summary of the changes in fair value, measured on a recurring basis
Ordinary shares, measurement inputs | Y	11.26	11.50
Volatility
Summary of the changes in fair value, measured on a recurring basis
Ordinary shares, measurement inputs | item	0.3030	0.3050
Underlying share price
Summary of the changes in fair value, measured on a recurring basis
Ordinary shares, measurement inputs | item	11.00	12.99