Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 159	$ 127	$ 418	$ 638
Weighted average shares outstanding:
Basic (in shares)	119.5	119.7	119.4	121.4
Dilutive restricted stock (in shares)	0.2	0.5	0.3	0.7
Diluted (in shares)	119.7	120.2	119.7	122.1
Basic earnings per share (in dollars per share)	$ 1.33	$ 1.06	$ 3.50	$ 5.26
Diluted earnings per share (in dollars per share)	$ 1.33	$ 1.06	$ 3.49	$ 5.23