Pension and Post Retirement Benefits (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension and Post Retirement Benefits (Textual) [Abstract]
Net periodic benefit costs				$ 5.0
Expected net periodic benefit costs			5
Expected contributions to benefit plans in 2012	35		35
Pension Plans [Member]
Pension and Post Retirement Benefits (Textual) [Abstract]
Net periodic benefit costs	1.1	1.0	2.2	2.0
Contributions made to benefit plans	13.0		19.0
Other Post-Retirement Benefit Plans [Member]
Pension and Post Retirement Benefits (Textual) [Abstract]
Net periodic benefit costs	0.2	0.3	0.5	0.6
Contributions made to benefit plans	$ 0.2		$ 0.4