Business and Basis of Presentation (Other Balance Sheet and Income Statement Items) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Ownership percentage	100.00%
Term of original maturities, cash equivalents, up to and including	3 months
Shipping costs, and handling and storage costs	$ 7.7	$ 6.6