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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Earnings Per Share [Abstract]    
Net income attributable to Crown Holdings $ 88 $ 103
Weighted average shares outstanding:    
Basic (in shares) 134.1 133.8
Add: dilutive stock options and restricted stock (in shares) 0.9 0.6
Diluted (in shares) 135.0 134.4
Basic earnings per share (in usd per share) $ 0.66 $ 0.77
Diluted earnings per share (in usd per share) $ 0.65 $ 0.77
Value of shares excluded from the computation of diluted earnings per share 0.4 0.2