| Restructuring Charge (Tables) | 9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Dec. 31, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring And Related Activities [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Reconciliation of Changes in Restructuring Reserve | The reconciliation of the changes in the restructuring reserve is as follows: 
 
 
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- References No definition available. 
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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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