Equity and Accumulated Other Comprehensive Income (Loss)-Minimum Pension Liability (Details) - USD ($) $ in Millions		6 Months Ended	12 Months Ended
		Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Net investment hedge			$ (21.3)	$ 1.8	$ 30.0
Long term inter-company loans			(14.3)	(65.0)	(9.0)
Translation adjustments			(3.8)	(54.9)	(152.7)
Total foreign currency translation adjustments, pretax			(39.4)	(118.1)	(131.7)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	[1]		(7.5)	0.7	12.3
Total foreign currency translation adjustments, net of tax			(31.9)	(118.8)	(144.0)
Net gain/(loss) arising during the year			(13.9)	16.4	12.3
Net (gain)/loss recognized during the year			4.3	3.4	3.1
Foreign Exchange Translation and Other			0.5	(0.2)	0.6
Total Pension, pretax			18.7	(13.2)	(8.6)
Pension liability tax			5.7	(4.1)	(2.2)
Net change in minimum pension liability, net of tax			13.0	(9.1)	(6.4)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax			16.2	0.0	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax			0.0	0.0	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax			16.2	0.0	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax			5.7	0.0	0.0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax		$ 15.3	$ 10.5	$ 0.0	$ 0.0

[1] Tax related to foreign currency translation adjustments relates to the net investment hedge activity.