Intangible Assets (Schedule of Identifiable Acquisition Related Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Jun. 30, 2016
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,464.3	$ 1,145.4
Accumulated Amortization	(285.3)	(229.3)
Total Net	1,179.0	916.1
Intangible Assets, Gross (Excluding Goodwill)	1,481.9	1,164.2
Intangible Assets, Net	1,196.6	934.9
Certifications [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount, Indefinite-lived Intangibles	3.5	3.5
Indefinite-Lived Underlying Rights [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount, Indefinite-lived Intangibles	14.1	15.3
Customer relationships [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	1,462.7	1,143.6
Accumulated Amortization	(284.9)	(228.8)
Total Net	1,177.8	914.8
Trade names [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount		0.2
Accumulated Amortization		(0.2)
Finite-Lived Underlying rights [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	1.6	1.6
Accumulated Amortization	(0.4)	(0.3)
Total Net	$ 1.2	$ 1.3