Service Alignment Initiative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Balance at June 30, 2016		$ 0.0
Charged to expense	$ 0.6	41.6
Cash payments		(7.3)
Non-cash utilization		(1.6)
Balance at March 31, 2017	32.7	32.7
Employee separation benefits
Restructuring Reserve [Roll Forward]
Balance at June 30, 2016		0.0
Charged to expense	(0.1)	37.2
Cash payments		(4.9)
Non-cash utilization		0.0
Balance at March 31, 2017	32.3	32.3
Other initiative costs
Restructuring Reserve [Roll Forward]
Balance at June 30, 2016		0.0
Charged to expense	0.7	4.4
Cash payments		(2.4)
Non-cash utilization		(1.6)
Balance at March 31, 2017	0.4	0.4
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100.0	100.0
Minimum | Employee separation benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	75.0	75.0
Minimum | Other initiative costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	25.0	25.0
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring charges	125.0	125.0
Maximum | Employee separation benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	85.0	85.0
Maximum | Other initiative costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 40.0	$ 40.0