Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Goodwill
Balance at the beginning of the period	$ 4,933
Effects of currency exchange	37
Balance at the end of the period	4,970
Goodwill	4,933
Beverage packaging, North And Central America
Goodwill
Balance at the beginning of the period	1,275
Balance at the end of the period	1,275
Goodwill	1,275
Beverage packaging, South America
Goodwill
Balance at the beginning of the period	1,299
Balance at the end of the period	1,299
Goodwill	1,299
Beverage packaging, Europe
Goodwill
Balance at the beginning of the period	1,531
Effects of currency exchange	33
Balance at the end of the period	1,564
Goodwill	1,531
Food and aerosol packaging
Goodwill
Balance at the beginning of the period	609
Effects of currency exchange	4
Balance at the end of the period	613
Goodwill	609
Aerospace
Goodwill
Balance at the beginning of the period	40
Balance at the end of the period	40
Goodwill	40
Beverage Asia Pacific
Goodwill
Balance at the end of the period	78
Percentage of fair value exceeding carrying value		24.00%
Goodwill	78
Corporate and Other
Goodwill
Balance at the beginning of the period	179
Balance at the end of the period	179
Goodwill	$ 179