Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2021
Employee Stock [Member]
Class Of Stock [Line Items]
Number of shares issued		1,499,751
Employee Stock [Member] | Class A Common Stock
Class Of Stock [Line Items]
Maximum number of shares, an employee can purchase	1,250
Purchase price of common stock, percent of fair market value	85.00%
Minimum | Employee Stock [Member] | Class A Common Stock
Class Of Stock [Line Items]
Percentage of payroll deductions	1.00%
Maximum | Employee Stock [Member] | Class A Common Stock
Class Of Stock [Line Items]
Percentage of payroll deductions	10.00%
Performance-based RSUs [Member]
Class Of Stock [Line Items]
Weighted-average grant-date fair value per share		$ 8.83
Total future compensation expense		$ 77.0
Remaining weighted-average amortization period		2 years
RSUs [Member]
Class Of Stock [Line Items]
Weighted-average grant-date fair value per share		$ 8.99
Total future compensation expense		$ 83.0
Remaining weighted-average amortization period		2 years 3 months 18 days
RSUs and PRSUs[Member]
Class Of Stock [Line Items]
Vesting period				3 years
Expected to forfeit		$ 3.5
Share-based compensation		$ 28.0	$ 34.0
2021 Omnibus Incentive Plan
Class Of Stock [Line Items]
Remaining shares of common stock authorized		79,157,976
2021 Omnibus Incentive Plan | Time-based RSUs [Member]
Class Of Stock [Line Items]
Percentage of units granted subject to vesting requirements		42.00%
2021 Omnibus Incentive Plan | Performance-based RSUs [Member]
Class Of Stock [Line Items]
Percentage of units granted subject to vesting requirements		58.00%
Employee Stock Purchase Plan
Class Of Stock [Line Items]
Remaining shares available for grant		11,961,530
Share-based compensation		$ 2.0