Pension and Post-retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.1	$ 1.3
Interest cost	4.4	4.1
Expected return on plan assets	(5.7)	(5.2)
Amortization of prior service cost	0.1	0.1
Recognized actuarial loss	1.6	2.4
Settlements and curtailments	0	0.5
Net periodic benefit cost	1.5	3.2
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0	0
Interest cost	0	0.1
Expected return on plan assets	0	0
Amortization of prior service cost	(0.8)	(0.8)
Recognized actuarial loss	0.4	0.4
Settlements and curtailments	0	0
Net periodic benefit cost	$ (0.4)	$ (0.3)