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, 2022	Mar. 31, 2021
Computation of Basic Earnings Per Share
Net income (loss)	$ 377	$ (11)
Shares for basic earnings per share (in shares)	328.3	326.7
Basic earnings (loss) per share (in USD per share)	$ 1.15	$ (0.03)
Computation of Diluted Earnings Per Share
Net income (loss)	$ 377	$ (11)
Shares for basic earnings per share (in shares)	328.3	326.7
Effect of dilutive securities
Stock-based compensation (in shares)	1.7	0.0
Shares for diluted earnings per share (in shares)	330.0	326.7
Diluted earnings (loss) per share (in USD per share)	$ 1.14	$ (0.03)
Antidilutive shares (in shares)		2.3