Stock-Based Compensation Expense - Performance Stock Units Outstanding (Details) - Performance Shares [Member] - shares shares in Thousands |
12 Months Ended | |
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Mar. 31, 2018 |
Mar. 31, 2017 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Target | 73,684 | 47,486 |
| Minimum [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Possible number of shares issued each year | 0 | 0 |
| Maximum [Member] | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Possible number of shares issued each year | 147,368 | 94,972 |
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- Definition Share Based Compensation Arrangement, Possible Number Of Shares Issued Each Year No definition available.
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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