Pension and Post-retirement Benefit Plans (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended					6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Mar. 31, 2012	Jun. 30, 2013		Jun. 30, 2012
Pension Benefits [Member]
Components of net periodic benefit cost
Service cost	$ 1.2		$ 1.3			$ 2.6		$ 2.7
Interest cost	4.2		4.3			8.3		8.6
Expected return on plan assets	(5.4)		(4.7)			(10.6)		(9.4)
Amortization of prior service cost	0.1		0.1			0.2		0.2
Recognized actuarial loss	2.3		2.1			4.6		4.3
Settlements or curtailments	0.7		6.3			1.2		6.3
Total net periodic benefit cost	3.1	[1]	9.4	[1]		6.3	[1]	12.7	[1]
Other Benefits [Member]
Components of net periodic benefit cost
Service cost	0		0			0		0.3
Interest cost	0		0.1			0.1		0.3
Expected return on plan assets	0		0			0		0
Amortization of prior service cost	(0.7)		(0.8)			(1.5)		(1.3)
Recognized actuarial loss	0.4		0.4			0.7		0.7
Settlements or curtailments	0				0	0		0
Total net periodic benefit cost	(0.3)	[1]	(0.3)	[1]		(0.7)	[1]	0	[1]
Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense	$ 0.1		$ 6.3			$ 0		$ 6.3

[1] Pension Expense of $0.1 million was included in Loss from discontinued operations for the three and six months ended June 30, 2013. Pension expense of $6.3 million was included in Loss from discontinued operations for the three and six months ended June 30, 2012.