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Business Consolidation and Other Activities (Details) $ in Millions		1 Months Ended	3 Months Ended				12 Months Ended
	Jul. 31, 2018 USD ($)	Oct. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($)
Business consolidation and other activities
Business consolidation and other activities							$ (244)	$ (191)	$ (221)
Gain related to indirect tax contingencies			$ 57
Charge in earnings for translation losses							$ (45)
Beverage Packaging Business In Saudi Arabia [Member]
Business consolidation and other activities
Ownership, as a percent							51.00%
US steel food and steel aerosol packaging \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group	$ (41)
Steel Aerosol Packaging Business In Argentina [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group		$ (52)
Charge in earnings for translation losses		$ 45
Beverage packaging, North And Central America
Business consolidation and other activities
Number of locations closed \| item								3
Beverage packaging, North And Central America \| Chatsworth, California facility
Business consolidation and other activities
Loss on sale of disposal group				$ 18
Operating Segments \| Beverage packaging, North And Central America
Business consolidation and other activities
Business consolidation and other activities							$ (14)	$ (6)	(47)
Individually insignificant activities							6	10	5
Reversal of previously recorded expenses related to facilities closure							8
Operating Segments \| Beverage packaging, North And Central America \| Reidsville, North Carolina facility \| Facility Closing
Business consolidation and other activities
Charges related to facilities closure								2
Operating Segments \| Beverage packaging, North And Central America \| Reidsville, North Carolina facility \| Employee Severance And Benefits Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure									9
Operating Segments \| Beverage packaging, North And Central America \| Birmingham, Alabama, Chatsworth, California And Longview, Texas facilities \| Employee Severance And Benefits
Business consolidation and other activities
Charges related to facilities closure									29
Operating Segments \| Beverage packaging, North And Central America \| Birmingham, Alabama, Chatsworth, California And Longview, Texas facilities \| Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure									4
Operating Segments \| Beverage packaging, North And Central America \| Birmingham, Alabama, Chatsworth, California And Longview, Texas facilities \| Employee Severance And Benefits Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure								12
Operating Segments \| Beverage packaging, South America
Business consolidation and other activities
Business consolidation and other activities							15	11	(5)
Charges related to facilities closure							29
Individually insignificant activities							13	3	2
Gain related to indirect tax contingencies							57	18
Operating Segments \| Beverage packaging, South America \| Employee Severance And Benefits Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure								4
Operating Segments \| Beverage packaging, South America \| Rexam
Business consolidation and other activities
Professional services and other costs									3
Operating Segments \| Beverage packaging, Europe
Business consolidation and other activities
Business consolidation and other activities							(39)	(49)	(89)
Charges related to facilities closure							26
Individually insignificant activities							13	5	4
Operating Segments \| Beverage packaging, Europe \| Rexam
Business consolidation and other activities
Professional services and other costs									4
Operating Segments \| Beverage packaging, Europe \| Recklinghausen, Germany facility \| Employee Severance And Benefits
Business consolidation and other activities
Charges related to facilities closure									59
Operating Segments \| Beverage packaging, Europe \| Recklinghausen, Germany facility \| Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure									22
Operating Segments \| Beverage packaging, Europe \| Recklinghausen, Germany facility \| Employee Benefits Severance Facility Shutdown Costs And Other Costs
Business consolidation and other activities
Charges related to facilities closure								18
Operating Segments \| Beverage packaging, Europe \| San Martino, Italy facility \| Employee Severance And Benefits Facility Shutdown Costs Asset Impairment Accelerated Depreciation And Other Costs
Business consolidation and other activities
Charges related to facilities closure				$ 26
Other
Business consolidation and other activities
Business consolidation and other activities							(206)	(147)	(80)
Individually insignificant activities							19	26	28
Settlement loss							8	36	44
Expense of indemnifications of uncertain tax positions								2
Other \| Employee Severance and Benefits, Accelerated Depreciation and Inventory Impairment
Business consolidation and other activities
Charges related to manufacturing cost rationalization								4
Other \| Beverage packaging China \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group							45
Professional services and other costs							18
Other \| US steel food and steel aerosol packaging \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group								41
Professional services and other costs								15
Other \| Steel Aerosol Packaging Business In Argentina [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group							52
Charge in earnings for translation losses							45
Other \| Divestment Business \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Expense of indemnifications of uncertain tax positions									34
Adjustment to gain on sale of Divestment Business									55
Other \| Rexam
Business consolidation and other activities
Professional services and other costs									12
Compensation arrangement expense								$ 23	$ 25
Other \| Weirton, West Virginia facility \| Facility Shutdown Costs And Accelerated Depreciation
Business consolidation and other activities
Charges related to facilities closure					$ 7
Other \| Hubbard, Ohio facility \| Food and aerosol packaging paint and general line can plant \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business consolidation and other activities
Loss on sale of disposal group						$ 15
Other \| SAUDI ARABIA
Business consolidation and other activities
Impairment of assets held for sale							$ 64