Retirement Plans and Postretirement Benefits (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2011
Pension [Member]
Retirement Plans and Postretirement Benefits (Textual) [Abstract]
Expected fiscal year Company contributions to pension plans and other postretirement plans	$ 129,100,000
Actual year-to-date Company contributions to pension plans and other postretirement plans	122,400,000
Other Postretirement Benefits [Member]
Retirement Plans and Postretirement Benefits (Textual) [Abstract]
Expected fiscal year Company contributions to pension plans and other postretirement plans	39,500,000
Actual year-to-date Company contributions to pension plans and other postretirement plans	$ 24,300,000