Pension Plans and Other Postretirement Benefits (Details 9) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost (credit)	$ 6.2
Amortization of net actuarial loss	74.9
Amortization of accumulated other comprehensive loss	81.1
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost (credit)	1.3
Amortization of net actuarial loss	65.4
Amortization of accumulated other comprehensive loss	66.7
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost (credit)	4.9
Amortization of net actuarial loss	9.5
Amortization of accumulated other comprehensive loss	$ 14.4