Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income from continuing operations attributable to Crown Holdings	$ 216	$ 167
Net income from discontinued operations attributable to Crown Holdings	0	44
Net income attributable to Crown Holdings	$ 216	$ 211
Weighted average shares outstanding:
Basic (in shares)	123.6	133.6
Dilutive restricted stock (in shares)	0.8	1.0
Diluted (in shares)	124.4	134.6
Basic earnings per common share from continuing operations (in dollars per share)	$ 1.75	$ 1.25
Basic earnings per common share from discontinued operations (in dollars per share)	0	0.33
Basic earnings per share (in dollars per share)	1.75	1.58
Diluted earnings per common share from continuing operations (in dollars per share)	1.74	1.24
Diluted earnings per common share from discontinued operations (in dollars per share)	0	0.33
Diluted earnings per share (in dollars per share)	$ 1.74	$ 1.57
Shares excluded from the computation of diluted earnings per share (in shares)	0.1