Employee Benefit Plans (Schedule of Amounts Recognized in Balance Sheet) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Noncurrent assets	$ 0	$ 0
Current liabilities	(1.6)	(1.4)
Noncurrent liabilities	(41.8)	(40.8)
Net amount recognized	(43.4)	(42.2)
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Noncurrent assets	0	0
Current liabilities	(0.9)	(0.9)
Noncurrent liabilities	(26.0)	(23.7)
Net amount recognized	$ (26.9)	$ (24.6)