Loss Contingencies (Narratives) (Details) (USD $)	9 Months Ended
	Dec. 31, 2012 month	Mar. 31, 2012
Loss Contingencies [Line Items]
Asbestos-related aggregate liability - Minimum	$ 8,000,000
Asbestos-related aggregate liability - Maximum	13,000,000
Loss Contingency, Estimate of Possible Loss	10,700,000
Loss Settlement Gross Period	12
Actuarial Parameters Of Continued Claims Minimum Period	18,000
Actuarial Parameters Of Continued Claims Maximum Period	30,000
Asbestos Related Aggregate Liability	2,000,000,000
Product Related Aggregate Liability	6,400,000,000
Asbestos Related And Non Asbestos Related Aggregate Liability	$ 17,100,000	$ 20,500,000