Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense - Performance Stock Units Outstanding (Details)

v3.4.0.3
Stock-Based Compensation Expense - Performance Stock Units Outstanding (Details) - Performance Shares [Member] - shares
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Target 38,086,000 38,703,000 12,096,000
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Possible number of shares issued each year 0 0 0
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Possible number of shares issued each year 76,172,000 77,406,000 24,192,000