Significant Assumptions Used to Determine Net Periodic Benefit Cost (Detail)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
United States Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.80%	5.70%	6.00%
Expected return on plan assets	8.00%	8.00%	8.00%
International Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.50%	4.00%	4.30%
Expected return on plan assets	5.50%	5.50%	5.50%
Rate of compensation increase	2.00%	2.00%	2.00%
International Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.50%	5.50%	6.00%
Expected return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase	4.00%	4.00%	3.50%