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
	Mar. 31, 2023	Mar. 31, 2022
Computation of Basic Earnings Per Share
Net income	$ 757	$ 377
Shares for basic earnings per share (in shares)	309.6	328.3
Basic (in USD per share)	$ 2.44	$ 1.15
Computation of Diluted Earnings Per Share
Net income	$ 757	$ 377
Shares for basic earnings per share (in shares)	309.6	328.3
Effect of dilutive securities
Stock-based compensation (in shares)	1.4	1.7
Shares for diluted earnings per share (in shares)	311.0	330.0
Diluted (in USD per share)	$ 2.43	$ 1.14