Stock Compensation - Annual Awards (Details) - Stock Incentive Plan 2015 - $ / shares	2 Months Ended	12 Months Ended
May 17, 2019	Mar. 31, 2019
Annual RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Granted (in shares)		62,743
Granted (in dollars per share)		$ 116.85
Annual PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)		3 years
Granted (in shares)		31,320
Granted (in dollars per share)		$ 116.34
Subsequent Event \| Annual RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0
Subsequent Event \| Annual PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Paragraph 2
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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

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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.

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