Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Jan. 26, 2018
Equity [Abstract]
Share repurchase authorization				10.0
Treasury shares repurchased (in shares)	0.8
Treasury shares repurchased (in usd)	$ 30.1		$ 15.5
Share repurchase authorization, remaining	2.2
Dividends declared	$ 7.1
Dividends to common shareholders	$ 7.9		$ 7.6
Dividends declared (per share)	$ 0.15	$ 0.15
Dividends declared (per share)	$ 0.15	$ 0.15
us-gaap_TreasuryStockValueAcquiredCostMethodlessexcisetax	$ 30.3