Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Benefits (Textuals) [Abstract]
Pension and Other Postretirement Benefit Contributions	$ 0	$ 0
Estimated liability of Postemployment benefits	4.2		4.2
Pension Plan, Defined Benefit [Member]
Net Periodic Benefit Cost
Service cost	2.7	4.2
Interest cost	17.1	15.1
Expected return on plan assets	(24.7)	(24.0)
Amortization of:
Prior service cost (credit)	0.5	0.6
Actuarial loss	9.1	13.6
Net Periodic Benefit Cost	4.7	9.5
Other Postretirement Benefit Plan, Defined Benefit [Member]
Net Periodic Benefit Cost
Service cost	2.2	2.7
Interest cost	4.5	3.9
Expected return on plan assets	(5.9)	(5.3)
Amortization of:
Transition obligation	0	0
Prior service cost (credit)	(0.5)	(0.5)
Actuarial loss	0.2	0.9
Net Periodic Benefit Cost	$ 0.5	$ 1.7