Health Advances (Detail) - USD ($) $ in Millions	Jan. 19, 2016	Jul. 01, 2014	Jun. 30, 2016	Jun. 30, 2015	Apr. 13, 2015	Jun. 30, 2014
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 71.6
Business Acquisition, Contingent Consideration, at Fair Value			$ 5.2	$ 7.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets					$ 1.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets					$ 2.0
Goodwill			389.2	$ 354.9		$ 329.5
Health Advances Acquisition [Member]
Payments to Acquire Businesses, Gross	67.3
Business Combination, Receivable from Working Capital Adjustment	(0.2)
Business Acquisition, Contingent Consideration, Potential Cash Payment	15.8
Business Acquisition, Contingent Consideration, at Fair Value	4.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	4.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	0.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	1.0
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	0.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	15.0
Goodwill	52.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	73.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	1.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1.8
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	71.6
Atlas [Member]
Payments to Acquire Businesses, Gross		$ 2.1
Goodwill	52.5		$ 1.4
Customer Relationships [Member] | Health Advances Acquisition [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 11.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Technology-Based Intangible Assets [Member] | Health Advances Acquisition [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1.8
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Trade Names [Member] | Health Advances Acquisition [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1.6
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years