Intangibles (Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense for intangible assets	$ 18.6	$ 21.9	$ 19.9
Estimated amortization expense 2013	18.6
Estimated amortization expense 2014	18.6
Estimated amortization expense 2015	18.3
Estimated amortization expense 2016	13.6
Estimated amortization expense 2017	$ 0