Stock-Based Compensation and Other Employee Benefit Plans - Restricted Shares, Narrative (Details) - Restricted Shares - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock-based compensation awards, unearned compensation	$ 57.9		$ 57.9
Stock-based compensation awards, unearned compensation, weighted average expected recognition period (in years)			2 years
Stock-based compensation, vested awards, intrinsic value	$ 0.7	$ 0.2	$ 78.0	$ 19.2