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Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Acquisitions and Dispositions (Details) $ / shares in Units, € in Billions, £ in Billions				2 Months Ended	3 Months Ended			9 Months Ended
	May 16, 2017	Jun. 30, 2016 GBP (£) facility	Jun. 30, 2016 USD ($) facility $ / shares shares	Aug. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Mar. 31, 2016 EUR (€)	Mar. 31, 2016 USD ($)
Rexam
Purchase price, net of cash acquired									$ 3,379,000,000
Stock split ratio	2
Number of manufacturing facilities held at the end of the period \| facility			75
Divestment Business
Business consolidation and other activities						$ 157,000,000	$ 63,000,000	$ 253,000,000	302,000,000
Earnings before taxes								104,000,000
Earnings before taxes attributable to Ball Corporation								104,000,000
Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		22	22
Divestment Business
Divestiture consideration received			$ 3,420,000,000
Proceeds to be received under supply agreement			103,000,000
Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Forecast
Divestment Business
Pre-tax gain recorded in connection with sale					$ 60,000,000
Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Maximum
Divestment Business
Potential contingent payment required			$ 75,000,000
North America \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		8	8
Europe \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		12	12
Brazil \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		2	2
Rexam
Rexam
Percentage of shares acquired			100.00%
Purchase price, net of cash acquired		£ 2.9	$ 3,800,000,000
Share price \| $ / shares			$ 35.70
Value of common shares issued			$ 2,300,000,000
Consideration for stock-based compensation			$ 24,000,000
Number of manufacturing facilities acquired \| facility		54	54
Rexam debt assumed			$ 2,792,000,000
Rexam \| North America
Rexam
Number of manufacturing facilities acquired \| facility		17	17
Rexam \| Europe
Rexam
Number of manufacturing facilities acquired \| facility		20	20
Rexam \| South America
Rexam
Number of manufacturing facilities acquired \| facility		12	12
Rexam \| AMEA
Rexam
Number of manufacturing facilities acquired \| facility		5	5
Rexam Long Term Debt Assumed (Member) \| Rexam
Rexam
Rexam debt assumed			$ 2,800,000,000
Assumed debt extinguished				$ 2,700,000,000
Term A Loan, due June 2021
Rexam
Face amount of debt											$ 1,400,000,000
Term A Loan, Euro denominated, due June 2021
Rexam
Face amount of debt \| €										€ 1.1
Business consolidation and other activities
Rexam
Pre-tax transaction costs related to the acquisition							216,000,000		216,000,000
Business consolidation and other activities \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestment Business
Pre-tax gain recorded in connection with sale			330,000,000
Business consolidation and other activities								34,000,000
Business consolidation and other activities \| Current Liabilities \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Divestment Business
Estimated value of the claims under this indemnity						57,000,000		57,000,000
Business consolidation and other activities \| Rexam
Rexam
Pre-tax transaction costs related to the acquisition			$ 216,000,000
Ball Corporation
Rexam
Purchase price, net of cash acquired									(2,303,000,000)
Divestment Business
Business consolidation and other activities						$ 18,000,000	$ 154,000,000	$ 82,000,000	$ (355,000,000)
Ball Corporation \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		12	12
Ball Corporation \| Rexam
Rexam
Number of treasury shares issued \| shares			64,500,000
Rexam \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Rexam
Number of manufacturing facilities sold \| facility		10	10