Equity (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	$ (1.5)
Current period change	(9.9)
Balance at the end of the period	(11.4)
Deferred tax assets in accumulated other comprehensive income, pension liabilities	13.4	13.4
Deferred tax assets in accumulated other comprehensive income, unrealized loss on investments	0.1	0.1
Foreign Currency Translation Gain
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	21.0
Current period change	(10.1)
Balance at the end of the period	10.9
Unrealized Loss on Investments, Net of Tax
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period	(0.2)
Current period change	0.2
Minimum Pension Liability, Net of Tax
Schedule of accumulated other comprehensive loss
Balance at the beginning of the period		(22.3)
Balance at the end of the period	$ (22.3)	$ (22.3)