Dividends (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended					3 Months Ended
	Feb. 28, 2024	Jan. 31, 2024	Apr. 30, 2023	Mar. 31, 2023	Jan. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Cash dividends declared on common stock (in dollars per share)						$ 0.10	$ 0.10
Dividends paid to common shareholders						$ 497.9	$ 58.5
Dividends paid to preferred shareholders						$ 7.8	13.4
Series B Preferred Stock
Cash dividends paid on preferred stock (in dollars per share)	$ 15.688377			$ 26.875
Dividends paid to preferred shareholders	$ 7.8			$ 13.4
Preferred stock, liquidation preference per share (USD per share)						$ 1,000
Aggregate redemption amount						$ 507.8
Quarterly dividend
Cash dividends declared on common stock (in dollars per share)						$ 0.10
Cash dividends paid on common stock (in dollars per share)		$ 0.10	$ 0.10		$ 0.10
Dividends paid to common shareholders		$ 58.6	$ 58.5		$ 58.5
Annual variable dividend
Cash dividends paid on common stock (in dollars per share)		$ 0.75
Dividends paid to common shareholders		$ 439.3
Common equities | Quarterly dividend
Common share dividends				$ 58.5		$ 58.6	$ 58.5