Capital Stock - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 31, 2024	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Authorized capital stock		485,000,000	485,000,000
Common stock, shares authorized		475,000,000	475,000,000	475,000,000
Preferred stock, shares authorized		10,000,000	10,000,000	10,000,000
Preferred stock, shares issued		0	0	0
Stock repurchase program, authorized amount		$ 1,000.0	$ 1,000.0
Shares repurchased	295,129	1,095,129	1,400,000
Share repurchase, aggregate cost	$ 9.9	$ 33.9	$ 33.9