Employee Benefits Plan Assets (Details)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Cash and cash equivalents [Member]	Mar. 31, 2013 Equity securities [Member]	Mar. 31, 2013 Debt securities [Member]	Mar. 31, 2013 Real estate and other investments [Member]	Mar. 31, 2013 U.S. Pension Plans [Member]	Mar. 31, 2012 U.S. Pension Plans [Member]	Mar. 31, 2013 U.S. Pension Plans [Member] Cash and cash equivalents [Member]	Mar. 31, 2012 U.S. Pension Plans [Member] Cash and cash equivalents [Member]	Mar. 31, 2013 U.S. Pension Plans [Member] Equity securities [Member]	Mar. 31, 2012 U.S. Pension Plans [Member] Equity securities [Member]	Mar. 31, 2013 U.S. Pension Plans [Member] Debt securities [Member]	Mar. 31, 2012 U.S. Pension Plans [Member] Debt securities [Member]	Mar. 31, 2013 U.S. Pension Plans [Member] Real estate and other investments [Member]	Mar. 31, 2012 U.S. Pension Plans [Member] Real estate and other investments [Member]	Mar. 31, 2013 Non-U.S. Pension Plans [Member]	Mar. 31, 2012 Non-U.S. Pension Plans [Member]	Mar. 31, 2013 Non-U.S. Pension Plans [Member] Cash and cash equivalents [Member]	Mar. 31, 2012 Non-U.S. Pension Plans [Member] Cash and cash equivalents [Member]	Mar. 31, 2013 Non-U.S. Pension Plans [Member] Equity securities [Member]	Mar. 31, 2012 Non-U.S. Pension Plans [Member] Equity securities [Member]	Mar. 31, 2013 Non-U.S. Pension Plans [Member] Debt securities [Member]	Mar. 31, 2012 Non-U.S. Pension Plans [Member] Debt securities [Member]	Mar. 31, 2013 Non-U.S. Pension Plans [Member] Real estate and other investments [Member]	Mar. 31, 2012 Non-U.S. Pension Plans [Member] Real estate and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan asset allocations						100.00%	100.00%	2.30%	2.10%	35.90%	54.90%	22.20%	23.70%	39.60%	19.30%	100.00%	100.00%	2.00%	1.40%	61.10%	60.40%	31.10%	26.60%	5.80%	11.60%
Target plan asset allocations	100.00%	0.00%	37.00%	24.00%	39.00%