Rationalization Charges - Rationalization Charges by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Rationalization charges	$ 2,505	$ 3,195	$ 7,247	$ 48,594
Metal containers
Restructuring Cost and Reserve [Line Items]
Rationalization charges	1,639	3,035	4,755	42,280
Closures
Restructuring Cost and Reserve [Line Items]
Rationalization charges	787	72	2,229	5,979
Plastic containers
Restructuring Cost and Reserve [Line Items]
Rationalization charges	$ 79	$ 88	$ 263	$ 335