Outstanding and Weighted Average Common Shares - Changes in Outstanding Common Shares (Detail) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Beginning balance (in shares)	307,200,000	306,200,000	309,700,000
Activity related to restricted stock awards, net (in shares)	700,000	400,000	500,000
Stock options exercised (in shares)	273,000	200,000	900,000
PSUs vested (in shares)	100,000	400,000	500,000
Shares repurchased (in shares)	0	0	5,400,000
Ending balance (in shares)	308,300,000	307,200,000	306,200,000