Defined Benefit Plans - Defined Benefit Plans Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Sep. 30, 2013 Pension Plans, Defined Benefit [Member]	Sep. 30, 2013 Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	$ 1.5
Defined Benefit Plan, Contributions by Employer		0.7	2.6
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year			$ 3.0