Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended		3 Months Ended								12 Months Ended
	Apr. 30, 2019	Apr. 30, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings per share
Net earnings attributable to Ball Corporation			$ 160.0	$ 92.0	$ 197.0	$ 117.0	$ 151.0	$ 59.0	$ 119.0	$ 125.0	$ 566.0	$ 454.0	$ 374.0
Basic weighted average common shares											331,102	344,796	350,269
Effect of dilutive securities (in shares)											9,019	7,525	6,716
Weighted average shares applicable to diluted earnings per share											340,121	352,321	356,985
Per basic share (in dollars per share)			$ 0.49	$ 0.28	$ 0.59	$ 0.35	$ 0.45	$ 0.17	$ 0.34	$ 0.36	$ 1.71	$ 1.32	$ 1.07
Per diluted share (in dollars per share)			$ 0.48	$ 0.27	$ 0.58	$ 0.34	$ 0.44	$ 0.17	$ 0.34	$ 0.35	1.66	1.29	1.05
Dividends declared and paid
Dividends declared (in dollars per share)	$ 0.15	$ 0.10
Dividends paid (in dollars per share)											$ 0.55	$ 0.40	$ 0.365
Stock option and SSARs
Options excluded from EPS calculation
Number of outstanding options excluded from computation of diluted earnings per share												4,000	2,000