Service Alignment Initiative (Details) - USD ($) $ in Millions	3 Months Ended		26 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018
Restructuring Reserve [Roll Forward]
Beginning balance	$ 54.5	$ 74.4
Charged to expense	4.9	2.7
Reversals	(9.3)	(6.0)
Restructuring charges, net of reversals	(4.4)	(3.3)
Cumulative amount from inception through			$ 106.1
Cash payments	(11.5)	(10.6)
Non-cash utilization	(0.3)	(0.6)
Ending balance	38.3	59.9	38.3
Employee separation benefits
Restructuring Reserve [Roll Forward]
Beginning balance	54.0	73.9
Charged to expense	4.1	0.8
Reversals	(9.3)	(6.0)
Restructuring charges, net of reversals	(5.2)	(5.2)
Cumulative amount from inception through			94.3
Cash payments	(11.1)	(9.4)
Non-cash utilization	0.0	0.0
Ending balance	37.7	59.3	37.7
Other initiative costs
Restructuring Reserve [Roll Forward]
Beginning balance	0.5	0.5
Charged to expense	0.8	1.9
Reversals	0.0	0.0
Restructuring charges, net of reversals	0.8	1.9
Cumulative amount from inception through			11.8
Cash payments	(0.4)	(1.2)
Non-cash utilization	(0.3)	(0.6)
Ending balance	$ 0.6	$ 0.6	$ 0.6