Accounting Policies [Line Items]

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- Definition

Maximum Individual Claims Liability Health Insurance

+ References

No definition available.

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- Definition

Maximum individual claims liability workers compensation insurance.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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-Subparagraph (SAB Topic 14.F)
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

+ References

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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Description of Business, Basis of Presentation, and Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Aug. 31, 2018 USD ($) segment	Aug. 31, 2017 USD ($)	Jun. 30, 2019 USD ($)	May 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 01, 2016 USD ($)
Accounting Policies [Line Items]
Number of reportable segments \| segment	1
Stock-based compensation costs recognized	$ 10.9	$ 8.7
Maximum individual workers' compensation claims liability				$ 1.0				$ 1.3
Maximum individual health insurance claims liability					$ 0.3				$ 0.3
ASU 2014-09 [Member]
Accounting Policies [Line Items]
Cumulative adjustment to increase stockholder's equity											$ 262.9
HR Outsourcing Holdings, Inc. [Member]
Accounting Policies [Line Items]
Maximum individual workers' compensation claims liability						$ 0.5				$ 0.5
Maximum individual health insurance claims liability							$ 0.3
HR Outsourcing Holdings, Inc. [Member] \| Scenario, Forecast [Member]
Accounting Policies [Line Items]
Maximum individual health insurance claims liability			$ 0.3
Europe [Member] \| Revenue [Member] \| Geographic Concentration Risk [Member]
Accounting Policies [Line Items]
Total percentage	1.00%
Europe [Member] \| Revenue [Member] \| Geographic Concentration Risk [Member] \| Maximum [Member]
Accounting Policies [Line Items]
Total percentage		1.00%
Europe [Member] \| Long Lived Assets [Member] \| Geographic Concentration Risk [Member]
Accounting Policies [Line Items]
Total percentage	10.00%							10.00%