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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 174	$ 157	$ 241	$ 259
Weighted average shares outstanding:
Basic (in shares)	119.6	119.4	119.6	119.3
Dilutive restricted stock (in shares)	0.2	0.2	0.2	0.3
Diluted (in shares)	119.8	119.6	119.8	119.6
Basic earnings per share (in dollars per share)	$ 1.45	$ 1.31	$ 2.02	$ 2.17
Diluted earnings per share (in dollars per share)	$ 1.45	$ 1.31	$ 2.01	$ 2.16