Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Percentage of fair value of reporting unit in excess of carrying amount.

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Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Goodwill (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016
Goodwill
Balance at the beginning of the period	$ 5,095
Opening balance sheet adjustments	22
Business disposition	(9)
Effects of currency exchange rates	44
Balance at the end of the period	5,152
Goodwill	5,095	$ 5,095
Rexam
Goodwill
Goodwill			$ 3,799
Metal beverage packaging, North And Central America
Goodwill
Balance at the beginning of the period	1,614
Opening balance sheet adjustments	18
Balance at the end of the period	1,632
Goodwill	1,614	1,614
Metal beverage packaging, South America
Goodwill
Balance at the beginning of the period	970
Opening balance sheet adjustments	4
Balance at the end of the period	974
Goodwill	970	970
Metal beverage packaging, Europe
Goodwill
Balance at the beginning of the period	1,632
Effects of currency exchange rates	40
Balance at the end of the period	1,672
Goodwill	1,632	1,632
Food and aerosol packaging
Goodwill
Balance at the beginning of the period	599
Business disposition	(9)
Effects of currency exchange rates	2
Balance at the end of the period	592
Goodwill	599	599
Aerospace
Goodwill
Balance at the beginning of the period	40
Balance at the end of the period	40
Goodwill	40	40
Other
Goodwill
Balance at the beginning of the period	240
Effects of currency exchange rates	2
Balance at the end of the period	242
Goodwill	240	$ 240
Metal Beverage Packaging Asia (Member)
Goodwill
Balance at the end of the period	78
Percentage of fair value exceeding carrying value		23.00%
Goodwill	$ 78