Capital Stock, Dividends and Common Stock Repurchase Program - Repurchases (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		1 Months Ended				12 Months Ended
	Oct. 01, 2023	Feb. 29, 2024	Oct. 31, 2023	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capital Stock, Dividends and Common Stock Repurchase Program
Shares repurchased (in shares)						7,840	9,796	8,731
Weighted average price per share (in dollars per share)						$ 158.47	$ 160.26	$ 146.61
Total repurchases (in dollars)						$ 1,242	$ 1,570	$ 1,280
Cash paid for repurchase of common stock						1,302	$ 1,500	$ 1,350
Authorized share repurchases						$ 1,500
Accelerated Share Repurchase Agreement (ASR) [Member]
Capital Stock, Dividends and Common Stock Repurchase Program
Shares repurchased (in shares)	1,500	200		400	1,700	6,000	8,800	7,000
Total repurchases (in dollars)			$ 300
Cash paid for repurchase of common stock	$ 300			$ 70	$ 350	$ 950	$ 1,417	$ 1,000
Initial stock repurchase price (in dollars per share)	$ 161.38				$ 160.67
Weighted average final purchase price (in dollars per share)		$ 175.29		$ 160.33
10b5-1 Plan [Member]
Capital Stock, Dividends and Common Stock Repurchase Program
Shares repurchased (in shares)						300	600
Cash paid for repurchase of common stock						$ 52	$ 83