Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended		12 Months Ended
	Apr. 20, 2022	Apr. 01, 2022	Feb. 14, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Subsequent Event [Line Items]
Stock options granted (in shares)				0	0
Stock options granted, weighted-average exercise price (in dollars per share)				$ 0
Stock Options
Subsequent Event [Line Items]
Vesting period			10 years	4 years
Weighted-average remaining vesting period				2 years 1 month 6 days		2 years 3 months 18 days
Options unrecognized stock-based compensation expense				$ 17.5		$ 20.1
Stock Options | 2019 Equity Incentive Plan
Subsequent Event [Line Items]
Vesting period			10 years
Class A common stock | 2019 Equity Incentive Plan
Subsequent Event [Line Items]
Stock options granted (in shares)			4,915,000
Stock options granted, weighted-average exercise price (in dollars per share)			$ 105.56
Subsequent Event
Subsequent Event [Line Items]
Options unrecognized stock-based compensation expense	$ 300.0
Subsequent Event | Stock Options
Subsequent Event [Line Items]
Weighted-average remaining vesting period	5 years
Area 1 Security, Inc | Subsequent Event
Subsequent Event [Line Items]
Consideration transferred or transferrable		$ 162.0
Area 1 Security, Inc | Subsequent Event | Class A common stock
Subsequent Event [Line Items]
Consideration payable in common stock, percentage		40.00%