Employee Benefit Plans (Schedule of Expected Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future benefit payments, 2013	$ 1.6
Estimated future benefit payments, 2014	1.6
Estimated future benefit payments, 2015	1.6
Estimated future benefit payments, 2016	2.8
Estimated future benefit payments, 2017	2.8
Estimated future benefit payments, 2018-2022	15.1
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated future benefit payments, 2013	0.9
Estimated future benefit payments, 2014	1.0
Estimated future benefit payments, 2015	1.1
Estimated future benefit payments, 2016	1.1
Estimated future benefit payments, 2017	1.1
Estimated future benefit payments, 2018-2022	$ 6.8