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Acquisitions - Pro forma (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Acquisitions        
Net sales $ 2,815.0 $ 2,097.0 $ 6,600.0 $ 6,192.0
Basic earnings (loss) per share   $ 1.30 $ 0.50 $ (2.71)
Diluted earnings (loss) per share   $ 1.28 $ 0.49 $ (2.71)
After-tax pro forma adjustments        
Cost of sales associated with Rexam inventory step-up 83.0   $ 83.0  
Rexam        
Acquisitions        
Net sales $ 1.3      
Net sales   $ 2,911.0 7,994.0 $ 8,600.0
Net earnings attributable to Ball Corporation   $ 229.0 $ 87.0 (476.0)
After-tax pro forma adjustments        
Cost of sales associated with Rexam inventory step-up       $ 83.0
United Kingdom | Rexam        
Acquisitions        
Statutory tax rate used in pro forma adjustments 20.00% 20.00% 20.00% 20.25%
US | Rexam        
Acquisitions        
Tax rate used in recording tax impact of transaction costs already incurred     37.00%