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Share-Based Compensation (Tables)
6 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Fair Value of Each Stock Option Granted Using Monte Carlo Simulation Model
The fair value of each stock option and market-based RSU granted under the above plan was estimated on the date of grant using either a Black-Scholes option pricing model (service-based awards) or a Monte Carlo simulation model (market-based awards) with the following average assumptions:
 
Stock Options
 
RSUs
 
Six Months Ended September 30,
 
Six Months Ended September 30,
 
2016
 
2015
 
2016
 
2015
Risk-free interest rate
1.66
%
 
1.96
%
 
1.20
%
 
1.29
%
Volatility
35.12
%
 
36.90
%
 
33.08
%
 
36.86
%
Dividend yield
2.91
%
 
2.59
%
 
2.99
%
 
2.60
%
Expected life of option (in years)
4.75

 
4.75