Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended		60 Months Ended
	Mar. 31, 2023	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 14, 2023	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.10		$ 0.00	$ 0.20	$ 0.00
Dividends payable		$ 58.4	$ 58.4		$ 58.4			$ 1,467.9	$ 655.1
Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Dividends Per Share, Declared			$ 26.875
Dividends, Preferred Stock, Cash			$ 13.4
Preferred Stock, Shares Outstanding (shares)		500,000			500,000
Preferred Stock, Liquidation Preference Per Share (USD per share)		$ 1,000			$ 1,000
Scenario, Forecast | Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage							5.375%
London Interbank Offered Rate (LIBOR) | Scenario, Forecast | Series B Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Basis Spread on Variable Rate	2.539%