Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Assets [Abstract]
Trading securities	$ 2.6	$ 2.3
Derivative financial instruments	0.1
Total assets	2.7	2.3
Liabilities [Abstract]
Derivative financial instruments	0.3	1.4
Deferred compensation obligations	2.6	2.3
Total liabilities	2.9	3.7
Level 1 [Member]
Assets [Abstract]
Trading securities	2.6	2.3
Derivative financial instruments	0
Total assets	2.6	2.3
Liabilities [Abstract]
Derivative financial instruments	0	0
Deferred compensation obligations	2.6	2.3
Total liabilities	2.6	2.3
Level 2 [Member]
Assets [Abstract]
Trading securities	0	0
Derivative financial instruments	0.1
Total assets	0.1	0
Liabilities [Abstract]
Derivative financial instruments	0.3	1.4
Deferred compensation obligations	0	0
Total liabilities	0.3	1.4
Level 3 [Member]
Assets [Abstract]
Trading securities	0	0
Derivative financial instruments	0
Total assets	0	0
Liabilities [Abstract]
Derivative financial instruments	0	0
Deferred compensation obligations	0	0
Total liabilities	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value of obligations measured on a recurring basis.

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Fair value of financial and nonfinancial obligations.

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- Definition

Amount of investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.

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