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Discount Rate Assumptions for Postretirement Benefit Obligation (Table Text Block) | 12 Months Ended
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Mar. 31, 2015
Table Text Block [Abstract] |
Discount Rate Assumptions for Accumulated Postretirement Benefit Obligations |
|  | Years Ended March 31,
|  | 2015 |  | 2014 |  | 2013
|  | (In percentages)
Accumulated postretirement benefit obligation |  | 3.99% |  | 4.49% |  | 3.77%

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- Definition Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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