Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]

No definition available.

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- Definition

Total costs of sales and operating expenses for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Total costs and expenses	$ 176.5	$ 189.2	$ 468.7	$ 540.5
Operating income (loss)	17.0	7.7	109.0	30.4
Total other expense	$ (0.5)	0.3	$ (2.3)	(6.3)
Understated [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Total costs and expenses		5.2		2.0
Overstated [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Operating income (loss)		5.2		2.0
Total other expense		$ 5.2		$ 2.0
Assurex [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Non controlling interest ownership percentage by parent	85.00%		85.00%
Centre For Addiction And Mental Health [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Non controlling interest ownership percentage by noncontrolling owners	15.00%		15.00%