Employee Retirement Plans and Postretirement Benefits Amortization Amounts Expected (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Amortization of net prior service cost (gain)	$ (2.6)
Amortization of actuarial net loss (gain)	(10.4)
Pension
Defined Benefit Plan Disclosure [Line Items]
Amortization of net prior service cost (gain)	0.7
Amortization of actuarial net loss (gain)	(9.5)
OPEB
Defined Benefit Plan Disclosure [Line Items]
Amortization of net prior service cost (gain)	(3.3)
Amortization of actuarial net loss (gain)	$ (0.9)