Common Stock Repurchase Program - Repurchases (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended				3 Months Ended			6 Months Ended
	Jul. 31, 2022	Jun. 30, 2022	Apr. 30, 2022	Jan. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Common stock repurchase program
Authorized share repurchases		$ 976			$ 976			$ 976
Cash paid for repurchase of common stock								$ 520	$ 500
Accelerated Share Repurchase Agreement (ASR) [Member]
Common stock repurchase program
Cash paid for repurchase of common stock					$ 250	$ 250	$ 350
Shares repurchased (in shares)			0.3	0.4	1.6	1.4	1.7
Initial stock repurchase price (in dollars per share)						$ 146.43	$ 160.67
Weighted average final purchase price (in dollars per share)			$ 153.14	$ 160.33	$ 154.73
10b5-1 Plan [Member]
Common stock repurchase program
Cash paid for repurchase of common stock	$ 4	$ 24
Shares repurchased (in shares)		0.2
Weighted average final purchase price (in dollars per share)		$ 146.74