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, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 175	$ 193
Weighted average shares outstanding:
Basic (in shares)	112.0	116.7
Dilutive restricted stock (in shares)	0.5	0.3
Diluted (in shares)	112.5	117.0
Basic earnings per share (in dollars per share)	$ 1.56	$ 1.65
Diluted earnings per share (in dollars per share)	$ 1.56	$ 1.65