Goodwill (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Goodwill
Balance at the beginning of the period	$ 2,177,000,000
Business acquisition	3,798,000,000
Business disposition	(814,000,000)
Effects of currency exchange rates	22,000,000
Balance at the end of the period	5,183,000,000
Goodwill	2,177,000,000	$ 2,177,000,000
Rexam
Goodwill
Balance at the end of the period	3,767,000,000
Goodwill	3,767,000,000
Impairment of goodwill	0
Metal beverage packaging, Americas and Asia
Goodwill
Balance at the beginning of the period	739,000,000
Business disposition	(31,000,000)
Balance at the end of the period	708,000,000
Goodwill	739,000,000	739,000,000
Metal beverage packaging, Europe
Goodwill
Balance at the beginning of the period	817,000,000
Business disposition	(783,000,000)
Effects of currency exchange rates	28,000,000
Balance at the end of the period	62,000,000
Goodwill	817,000,000	817,000,000
Food and Aerosol packaging
Goodwill
Balance at the beginning of the period	612,000,000
Effects of currency exchange rates	3,000,000
Balance at the end of the period	615,000,000
Goodwill	612,000,000	612,000,000
Aerospace
Goodwill
Balance at the beginning of the period	9,000,000
Business acquisition	31,000,000
Balance at the end of the period	40,000,000
Goodwill	9,000,000	$ 9,000,000
Metal beverage packaging, Asia
Goodwill
Balance at the end of the period	78,000,000
Percentage of fair value exceeding carrying value		25.00%
Goodwill	78,000,000
Corporate and intercompany eliminations
Goodwill
Business acquisition	3,767,000,000
Effects of currency exchange rates	(9,000,000)
Balance at the end of the period	3,758,000,000
Goodwill	$ 3,758,000,000