Intangible Assets (Schedule of Identifiable Acquisition Related Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,150.8	$ 1,145.4
Accumulated Amortization	(247.8)	(229.3)
Total Net	903.0	916.1
Intangible Assets, Gross (Excluding Goodwill)	1,169.1	1,164.2
Intangible Assets, Net	921.3	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	14.8	15.3
Customer relationships [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	1,149.0	1,143.6
Accumulated Amortization	(247.3)	(228.8)
Total Net	901.7	914.8
Trade names [Member]
Schedule Of Intangible Assets Net Excluding Goodwill [Line Items]
Gross Carrying Amount	0.2	0.2
Accumulated Amortization	(0.2)	(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	(0.3)	(0.3)
Total Net	$ 1.3	$ 1.3