Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Dec. 31, 2015
Goodwill
Balance at the beginning of the period	$ 2,177	$ 2,255
Business acquisition	3,802	36
Business disposition	(822)
Effects of currency exchange rates	(62)	(114)
Balance at the end of the period	5,095	2,177
Impairment of goodwill	0
Goodwill	2,177	2,255		$ 2,177
Rexam
Goodwill
Goodwill			$ 3,771
Beverage packaging, North And Central America
Goodwill
Balance at the beginning of the period	561	561
Business acquisition	1,053
Balance at the end of the period	1,614	561
Goodwill	561	561		561
Beverage packaging, South America
Goodwill
Balance at the beginning of the period	100	100
Business acquisition	901
Business disposition	(31)
Balance at the end of the period	970	100
Goodwill	100	100		100
Beverage packaging, Europe
Goodwill
Balance at the beginning of the period	817	914
Business acquisition	1,625
Business disposition	(783)
Effects of currency exchange rates	(27)	(97)
Balance at the end of the period	1,632	817
Goodwill	817	914		817
Food and aerosol packaging
Goodwill
Balance at the beginning of the period	612	593
Business acquisition		36
Business disposition	(8)
Effects of currency exchange rates	(5)	(17)
Balance at the end of the period	599	612
Goodwill	612	593		612
Aerospace
Goodwill
Balance at the beginning of the period	9	9
Business acquisition	31
Balance at the end of the period	40	9
Goodwill	9	9		9
Other
Goodwill
Balance at the beginning of the period	78	78
Business acquisition	192
Effects of currency exchange rates	(30)
Balance at the end of the period	240	78
Goodwill	78	78		$ 78
Metal Beverage Packaging Asia (Member)
Goodwill
Balance at the beginning of the period	78
Balance at the end of the period		78
Percentage of fair value exceeding carrying value				23.00%
Goodwill	$ 78	$ 78		$ 78