Pension Plans and Other Postretirement Benefits (Details 6) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	$ 5.1	$ 0
Current liabilities	(5.3)	(10.9)
Noncurrent liabilities	(368.2)	(721.1)
Total amount recognized	(368.4)	(732.0)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	0	0
Current liabilities	(60.3)	(72.8)
Noncurrent liabilities	(442.4)	(495.2)
Total amount recognized	$ (502.7)	$ (568.0)