Goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets, Net

Schedule of goodwill

($ in millions)	​ Beverage Packaging, North & Central America		​ Beverage Packaging, South America		​ Beverage Packaging, Europe		​ Aerospace		Other		Total
Balance at December 31, 2017	$	1,275	$	1,299	$	1,531	$	40	$	788	$	4,933
Opening balance sheet adjustments		—		—		4		—		—		4
Business dispositions		—		—		—		—		(354)		(354)
Effects of currency exchange		—		—		(100)		—		(8)		(108)
Balance at December 31, 2018	$	1,275	$	1,299	$	1,435	$	40	$	426	$	4,475
Opening balance sheet adjustments		—		(1)		—		—		—		(1)
Business dispositions		—		—		—		—		(52)		(52)
Effects of currency exchange		—		—		(2)		—		(1)		(3)
Balance at December 31, 2019	$	1,275	$	1,298	$	1,433	$	40	$	373	$	4,419