Pension Benefits and Postretirement Benefits Other Than Pensions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2013 Pension Plans [Member]	Sep. 30, 2012 Pension Plans [Member]	Sep. 30, 2013 Pension Plans [Member]	Sep. 30, 2012 Pension Plans [Member]	Sep. 30, 2013 Postretirement Benefits Other than Pensions [Member]	Sep. 30, 2012 Postretirement Benefits Other than Pensions [Member]	Sep. 30, 2013 Postretirement Benefits Other than Pensions [Member]	Sep. 30, 2012 Postretirement Benefits Other than Pensions [Member]	Sep. 04, 2013 Cash Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 2.7	$ 2.6	$ 8.1	$ 8.2	$ 0	$ 0.1	$ 0.1	$ 0.2
Interest Cost on Projected Benefit Obligation	5.6	5.6	16.8	16.8	0.3	0.4	0.9	1.2
Expected Return on Plan Assets	(7.4)	(7.4)	(22.3)	(22.3)
Amortization of Accumulated Unrecognized Actuarial Loss	6.6	4.7	19.7	14.1	(0.3)	(0.3)	(0.9)	(0.9)
Total Expense Recognized	7.5	5.5	22.3	16.8	0	0.2	0.1	0.5
Defined Benefit Plan, Contributions by Employer									$ 55.0