Service Alignment Initiative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		29 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net of reversals	$ (6.4)	$ 3.3	$ (10.9)	$ 0.0
Cumulative amount from inception through					$ 99.6
Restructuring Reserve [Roll Forward]
Beginning balance			54.5	74.4
Charged to expense			5.8	10.8
Reversals			(12.6)	(10.8)
Cash payments			(17.7)	(20.2)
Non-cash utilization				(0.6)
Ending balance	30.0	53.6	30.0	53.6	30.0
Employee separation benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net of reversals	(3.3)	2.3	(8.5)	(2.9)
Cumulative amount from inception through					91.0
Restructuring Reserve [Roll Forward]
Beginning balance			54.0	73.9
Charged to expense			4.1	7.9
Reversals			(12.6)	(10.8)
Cash payments			(15.9)	(18.0)
Non-cash utilization				0.0
Ending balance	29.6	53.0	29.6	53.0	29.6
Other initiative costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net of reversals	1.0	1.0	1.7	2.9
Cumulative amount from inception through					12.7
Restructuring Reserve [Roll Forward]
Beginning balance			0.5	0.5
Charged to expense			1.7	2.9
Reversals			0.0	0.0
Cash payments			(1.8)	(2.2)
Non-cash utilization				(0.6)
Ending balance	0.4	0.6	0.4	0.6	0.4
Gain on sale of assets
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net of reversals	$ (4.1)	$ 0.0	$ (4.1)	$ 0.0
Cumulative amount from inception through					$ (4.1)