Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill
Balance at the beginning of the period		$ 4,484
Effects of currency exchange		(77)
Balance at the end of the period		4,407
Accumulated impairment, goodwill		62		$ 62
Goodwill		4,407		4,484
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		1,275
Beverage packaging, South America
Goodwill
Balance at the beginning of the period		1,298
Balance at the end of the period		1,298
Goodwill		1,298		1,298
Metal beverage packaging, Europe
Goodwill
Balance at the beginning of the period		1,573
Effects of currency exchange		(64)
Balance at the end of the period		1,509
Goodwill		1,509		1,573
Aerospace & technologies
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		298
Impairment of goodwill	$ 62		$ 62
Effects of currency exchange		(13)
Balance at the end of the period		285
Goodwill		$ 285		$ 298