Shareholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Equity, Class of Treasury Stock [Line Items]
Repurchase and retirement of common stock	$ 66.3	$ 38.3	$ 82.3	$ 101.1
Number of shares authorized to be repurchased (in shares)	1,109.3		1,109.3
Cash dividend paid during period, per share (in dollars per share)	$ 0.66	$ 0.65	$ 1.32	$ 1.30
Common stock excluded from calculation of diluted earnings per share (shares)	2.9	1.8	2.4	1.7
Common Stock
Equity, Class of Treasury Stock [Line Items]
Repurchase and retirement of common stock (shares)	0.8	0.4	1.0	0.9