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Number of shares that have been repurchased and retired during the period.

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Capital Stock - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended			3 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Oct. 31, 2021	Mar. 31, 2024	Mar. 31, 2023
Equity, Class of Treasury Stock [Line Items]
Cash dividends, per share (in dollars per share)	$ 0.21	$ 0.20	$ 0.15	$ 0.21	$ 0.57
Share repurchases and retirements (in shares)				6
Share repurchases and retirements				$ 157
Stock repurchase program				1,400
Share repurchases				$ 157	$ 271
Previous Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during period (in shares)					11
Share repurchases					$ 271