Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 126	$ 137	$ 214	$ 240
Weighted average shares outstanding:
Basic (in shares)	133.3	133.9	133.7	133.8
Add: dilutive stock options and restricted stock (in shares)	0.7	0.9	0.8	0.8
Diluted (in shares)	134.0	134.8	134.5	134.6
Basic earnings per share (in usd per share)	$ 0.95	$ 1.02	$ 1.60	$ 1.79
Diluted earnings per share (in usd per share)	$ 0.94	$ 1.02	$ 1.59	$ 1.78
Value of shares excluded from the computation of diluted earnings per share	0.3	0.2	0.7	0.4