Pension Benefits - Components Of Comprehensive OPEB (Income) Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Unrecognized Pension Loss Arising During the Year	$ (61.6)	$ 29.4	$ 53.9
Amortization of Unrecognized Postretirement Benefit Costs	(25.0)	(16.2)	(8.7)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost Earned During the Year	10.8	10.8	10.2
Interest Cost on Projected Benefit Obligation	22.4	22.4	22.9
Expected Return on Plan Assets	(29.7)	(29.8)	(24.4)
Net Amortization and Deferral	26.2	18.8	9.4
Settlement Benefits	0	0.3	0
Pension Expense Recognized	29.7	22.5	18.1
Unrecognized Pension Loss Arising During the Year	(53.8)	34.8	52.4
Amortization of Unrecognized Postretirement Benefit Costs	(26.2)	(18.8)	(9.4)
Comprehensive Pension Expense	(50.3)	38.5	61.1
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	9.2
Pension Plans, Defined Benefit [Member] | Segment, Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Expense Recognized		$ 0.5	$ 0.6