v2.4.0.6
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%