Service Alignment Initiative (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	$ 30.0				$ 30.0
Restructuring Reserve [Roll Forward]
Beginning balance			$ 0.0		0.0
Charged to expense	43.5	$ 0.6	39.9	$ 48.2	91.5
Reversals					1.5
Restructuring Charges, Net of Reversals					90.0
Cash payments					13.6
Non-cash utilization					2.0
Ending balance	74.4			0.0	74.4
Employee separation benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			0.0		0.0
Charged to expense					85.6
Reversals					1.5
Restructuring Charges, Net of Reversals					84.1
Cash payments					10.2
Non-cash utilization					0.0
Ending balance	73.9			0.0	73.9
Other initiative costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			$ 0.0		0.0
Charged to expense					5.9
Reversals					0.0
Cash payments					3.4
Non-cash utilization					2.0
Ending balance	$ 0.5			$ 0.0	$ 0.5