Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Metal Beverage Packaging, Americas and Asia	Mar. 31, 2014 Metal Beverage Packaging, Europe	Mar. 31, 2014 Metal food & household products packaging	Mar. 31, 2014 Aerospace & technologies	Dec. 31, 2013 Aerospace & technologies
Goodwill
Balance at the beginning of the period	$ 2,404.3	$ 740.7	$ 1,037.2	$ 617.8	$ 8.6	$ 8.6
Business disposition	(1.2)	(1.2)
Effects of currency exchange rates	(4.3)		(3.7)	(0.6)
Balance at the end of the period	$ 2,398.8	$ 739.5	$ 1,033.5	$ 617.2	$ 8.6	$ 8.6