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
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 193	$ 67
Weighted average shares outstanding:
Basic (in shares)	116.7	119.6
Dilutive restricted stock (in shares)	0.3	0.2
Diluted (in shares)	117.0	119.8
Basic earnings per share (in dollars per share)	$ 1.65	$ 0.56
Diluted earnings per share (in dollars per share)	$ 1.65	$ 0.56