Earnings Per Share - Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Computation of Basic Earnings Per Share
Net income	$ 630	$ 678	$ 377	$ 220	$ 422	$ (11)	$ 1,685	$ 631
Shares for basic earnings per share (in shares)	324.5			327.3			327.0	327.0
Basic (in USD per share)	$ 1.94			$ 0.67			$ 5.15	$ 1.93
Computation of Diluted Earnings Per Share
Net income	$ 630	$ 678	$ 377	$ 220	$ 422	$ (11)	$ 1,685	$ 631
Shares for basic earnings per share (in shares)	324.5			327.3			327.0	327.0
Effect of dilutive securities
Stock-based compensation (in shares)	1.2			2.0			1.4	2.1
Shares for diluted earnings per share (in shares)	325.7			329.3			328.4	329.1
Diluted (in USD per share)	$ 1.94			$ 0.67			$ 5.13	$ 1.92