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Acquisitions and Dispositions - Dispositions (Details) $ in Millions		6 Months Ended
	Jul. 31, 2018 USD ($) Plant	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Assets [Abstract]
Cash		$ 63
Assets held for sale		470	$ 6
Liabilities [Abstract]
Liabilities held for sale		182
Beverage Packaging China \| Held-for-sale
Disposition
Consideration for the sale of business			225
Amount of impairment or adjustments required for disposal		0
Assets [Abstract]
Cash		63
Receivables		107
Inventories		43
Property, plant and equipment		171
Goodwill		51
Other assets		16
Assets held for sale		451
Liabilities [Abstract]
Accounts payable		148
Accrued employee costs		7
Other current liabilities		27
Liabilities held for sale		182
US steel food and steel aerosol packaging \| Held-for-sale
Disposition
Consideration for the sale of business	$ 600
Loss on sale of disposal group	$ 41
Number of plants sold \| Plant	9
Ball Metalpack \| Receivables Net
Related party transactions
Accounts receivable from joint venture		33	170
Ball Metalpack \| Accounts Payable
Related party transactions
Accounts payable to joint venture		$ 5	$ 34
Ball Metalpack
Disposition
Percentage of ownership in a joint venture	49.00%