Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Dividends [Abstract]
Dividends declared and paid	$ 13.3	$ 13.8	$ 40.3	$ 42.2
Dividends declared and paid, per share	$ 0.2	$ 0.2	$ 0.6	$ 0.6