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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share [Abstract]        
Net income attributable to Crown Holdings $ 128 $ 169 $ 235 $ 248
Weighted average shares outstanding:        
Basic (in shares) 135.3 138.5 136.9 138.3
Add: dilutive stock options and restricted stock (in shares) 0.4 0.8 0.5 0.9
Diluted (in shares) 135.7 139.3 137.4 139.2
Basic earnings per share (in usd per share) $ 0.95 $ 1.22 $ 1.72 $ 1.79
Diluted earnings per share (in usd per share) $ 0.94 $ 1.21 $ 1.71 $ 1.78
Shares excluded from the computation of diluted earnings per share 0.1 0.1 0.1 0.4