Defined Benefit Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 0.8	$ 0.9	$ 1.6	$ 1.8
Interest cost	3.3	3.7	6.5	7.4
Expected return on plan assets	(4.1)	(4.3)	(8.2)	(8.6)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0.1	0.1	0.2
Defined Benefit Plan, Amortization of Gains (Losses)	1.9	1.7	3.7	3.4
Net periodic pension cost	1.9	2.1	3.7	4.2
Pension expense		4.2	3.7
Pension Contributions			1.1
Anticipated Pension Contributions	$ 4.0		$ 4.0