Accumulated Other Comprehensive (Loss) Income Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (130.6)	$ 1.3
Other comprehensive income (loss) before reclassifications, net	(416.7)	3.5
Reclassifications, pretax	0	(0.1)
Tax benefit reclassified	(0.5)	0
Ending balance	(547.8)	4.7
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(122.2)	(0.6)
Other comprehensive income (loss) before reclassifications, net	(425.3)	3.3
Reclassifications, pretax	0	0
Tax benefit reclassified	0	0
Ending balance	(547.5)	2.7
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(14.9)	1.8
Other comprehensive income (loss) before reclassifications, net	0	0.2
Reclassifications, pretax	0	0
Tax benefit reclassified	(0.5)	0
Ending balance	(15.4)	2.0
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0.1	0
Other comprehensive income (loss) before reclassifications, net	(0.1)	0
Reclassifications, pretax	0	0
Tax benefit reclassified	0	0
Ending balance	0	0
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	0.1
Other comprehensive income (loss) before reclassifications, net	0	0
Reclassifications, pretax	0	(0.1)
Tax benefit reclassified	0	0
Ending balance	0	0
Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	6.4	0
Other comprehensive income (loss) before reclassifications, net	8.7
Reclassifications, pretax	0	0
Tax benefit reclassified	0	0
Ending balance	$ 15.1	$ 0