Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Net income attributable to Crown Holdings	$ 183	$ 164	$ 423	$ 386
Weighted average shares outstanding:
Basic (in shares)	133.9	133.7	133.9	133.6
Add: dilutive stock options and restricted stock (in shares)	1.1	0.1	0.9	0.2
Diluted (in shares)	135.0	133.8	134.8	133.8
Basic earnings per share (in usd per share)	$ 1.37	$ 1.23	$ 3.16	$ 2.89
Diluted earnings per share (in usd per share)	$ 1.36	$ 1.23	$ 3.14	$ 2.88
Value of shares excluded from the computation of diluted earnings per share	0.2	0.4	0.6	0.9