Intangible Assets and Goodwill - Goodwill (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Mar. 31, 2014 Storage Solutions	Mar. 31, 2014 Income Approach Valuation Technique Goodwill
Goodwill [Line Items]
Goodwill impairment test, estimated fair value in excess of carrying value, percentage	24.70%	25.70%	1.00%
Fair value inputs, forecast period					10 years
Fair value inputs, terminal growth rate					3.00%
Goodwill impairment test, decrease of residual growth rate potentially result in indication of impairment (less than 2.0 basis point)					2.00%
Goodwill impairment test, increase of discount rate potentially result in indication of impairment (less than 1.0 basis point)					1.00%
Fair value inputs, discount rate					13.50%
Goodwill	$ 72.0	$ 72.1		$ 64.1