Retirement Plans (Details) In Millions, unless otherwise specified		1 Months Ended		3 Months Ended
	Mar. 31, 2013 USD ($)	Apr. 30, 2013 Subsequent Event [Member] USD ($)	Apr. 30, 2013 Subsequent Event [Member] EUR (€)	Mar. 31, 2013 Defined Benefit Pension Plans [Member] USD ($)	Mar. 31, 2012 Defined Benefit Pension Plans [Member] USD ($)	Mar. 31, 2013 Retiree Health Care Plan [Member] USD ($)	Mar. 31, 2012 Retiree Health Care Plan [Member] USD ($)
Defined Benefit Plan Disclosure [Line Items]
Service cost				$ 2.2	$ 2.6	$ 0	$ 0
Interest cost				3.1	3.7	0.3	0.3
Expected return on assets				(2.8)	(3.6)	0	0
Other				0.9	0.4	0.1	0
Total benefit cost				3.4	3.1	0.4	0.3
Recognized curtailment gain		2.3	1.8
Contributions to pension plans				4.0
Contributions to retiree health care plan						0.5
Estimated employer contribution to pension plans during current fiscal year	$ 18.0