Loss Contingencies (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Loss Contingency [Abstract]
Aggregate amount of reserves	$ 12,530,000	$ 14,480,000	$ 17,119,000	$ 20,536,000
Per occurrence limits on self-insurance for general and product liability coverage	2,000,000
Per occurrence limits on self-insurance for general and product liability coverage for 2014 and thereafter	3,000,000
Coverage minimum	2,000,000
Coverage maximum	6,000,000
Asbestos-related aggregate liability - Minimum	6,700,000
Asbestos-related aggregate liability - Maximum	11,200,000
Claims maximum period	37 years
Asbestos related aggregate liability	8,065,000,000
Estimated asbestos related liability payments over the next 12 months	2,000,000
Product related aggregate liability	$ 4,465,000,000