Intangible Assets Intangible Assets Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangible Assets Abstract
Amortization of intangible assets	$ 144.6	$ 153.2	$ 156.1
Future estimated amortization expense, year one	145
Future estimated amortization expense, year two	142
Future estimated amortization expense, year three	138
Future estimated amortization expense, year four	112
Future estimated amortization expense, year five	$ 66