Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 103	$ 90
Weighted average shares outstanding:
Basic (in shares)	133.8	133.5
Add: dilutive stock options and restricted stock (in shares)	0.6	0.3
Diluted (in shares)	134.4	133.8
Basic earnings per share (in usd per share)	$ 0.77	$ 0.67
Diluted earnings per share (in usd per share)	$ 0.77	$ 0.67
Value of shares excluded from the computation of diluted earnings per share	0.2	0.2