Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (387.6)	$ 23.1	$ (130.6)	$ 1.3
Other comprehensive (loss) income before reclassifications, net	(353.8)	(56.6)	(610.3)	(34.6)
Reclassifications, pretax				(0.3)
Tax benefit reclassified			(0.5)	0.1
Ending balance	(741.4)	(33.5)	(741.4)	(33.5)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(386.0)	22.4	(122.2)	(0.6)
Other comprehensive (loss) income before reclassifications, net	(350.2)	(60.3)	(614.0)	(37.3)
Reclassifications, pretax				0.0
Tax benefit reclassified			0.0	0.0
Ending balance	(736.2)	(37.9)	(736.2)	(37.9)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(15.4)	2.0	(14.9)	1.8
Other comprehensive (loss) income before reclassifications, net	0.0	0.0	0.0	0.2
Reclassifications, pretax				0.0
Tax benefit reclassified			(0.5)	0.0
Ending balance	(15.4)	2.0	(15.4)	2.0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0.3	0.0	0.1	0.0
Other comprehensive (loss) income before reclassifications, net	1.0	(0.1)	1.2	0.0
Reclassifications, pretax				(0.1)
Tax benefit reclassified			0.0	0.0
Ending balance	1.3	(0.1)	1.3	(0.1)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0.0	0.0	0.0	0.1
Other comprehensive (loss) income before reclassifications, net	(11.8)	0.0	(11.8)	0.0
Reclassifications, pretax				(0.2)
Tax benefit reclassified			0.0	0.1
Ending balance	(11.8)	0.0	(11.8)	0.0
Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	13.5	(1.3)	6.4	0.0
Other comprehensive (loss) income before reclassifications, net	7.2	3.8	14.3	2.5
Reclassifications, pretax				0.0
Tax benefit reclassified			0.0	0.0
Ending balance	$ 20.7	$ 2.5	$ 20.7	$ 2.5