Stock-based Compensation Plans - Summary of Stock Option Activity (Detail) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning of year, Shares	28	35	42
Exercised, Shares	(1)	(2)	(2)
Forfeited/expired, Shares	(5)	(5)	(5)
Outstanding at year-end, Shares	22	28	35
Outstanding at beginning of year, Weighted-Average Exercise Price	$ 72.33	$ 70.31	$ 68.95
Exercised, Weighted-Average Exercise Price	39.91	40.02	40.04
Forfeited/Expired, Weighted Average Exercise Price	91.55	73.18	71.45
Outstanding at year-end, Weighted-Average Exercise Price	$ 69.20	$ 72.33	$ 70.31