Indebtedness (Trade Receivables Securitization Narrative) (Details) (Trade receivables securitization [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2015 banks
Debt Instrument [Line Items]
Number of commercial banks participating in trade securitization agreement	3
Trade receivables securitization	$ 295us-gaap_SecuredLongTermDebt
Basis spread on variable rate	0.75%
Maximum [Member]
Debt Instrument [Line Items]
Trade receivables securitization	$ 295

Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Name:	us-gaap_SecuredLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant