Discount Rate Assumptions for Postretirement Benefit Obligation (Table Text Block)

12 Months Ended

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%