Share Based Awards (Details 1)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2011 Minimum [Member]	Mar. 31, 2013 Maximum [Member]	Mar. 31, 2011 Maximum [Member]	Mar. 31, 2013 Employee Stock Option [Member]	Mar. 31, 2012 Employee Stock Option [Member]	Mar. 31, 2011 Employee Stock Option [Member] Minimum [Member]	Mar. 31, 2011 Employee Stock Option [Member] Maximum [Member]
Schedule of Share Based Compensation Valuation Assumption
Expected life						5 years 0 months 12 days	4 years 3 months 18 days	4 years 2 months 12 days
Expected volatility	41.20%	41.30%	42.60%	45.10%	44.70%
Expected Dividends	1.60%	2.40%	1.90%	4.00%	2.20%
Risk-free rate	1.80%	0.70%	1.50%	0.80%	2.10%