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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Net income (loss) attributable to Crown Holdings	$ 214	$ (175)	$ 588	$ 66
Weighted average shares outstanding:
Basic (in shares)	115.2	119.3	115.7	119.5
Dilutive restricted stock (in shares)	0.5	0.0	0.5	0.2
Diluted (in shares)	115.7	119.3	116.2	119.7
Basic earnings (loss) per share (in dollars per share)	$ 1.86	$ (1.47)	$ 5.08	$ 0.55
Diluted earnings (loss) per share (in dollars per share)	$ 1.85	$ (1.47)	$ 5.06	$ 0.55