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Stock-Based Compensation - Annual Awards (Details) - Stock Incentive Plan 2015 - $ / shares | 6 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
Annual RSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 34,211 | 38,307
Weighted-average grant date fair value (in dollars per share) | $ 200.83 | $ 173.65
Annual PSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 0 | 19,938
Weighted-average grant date fair value (in dollars per share) | $ 0 | $ 174.36
Annual RSUs and Annual PSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 34,211 | 58,245
Weighted-average grant date fair value (in dollars per share) | $ 200.83 | $ 173.89

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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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References No definition available. + Details
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