Goodwill and Other Intangible Assets (Other Intangible Assets Narrative) (Details) (USD $)	3 Months Ended		3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Mar. 31, 2012 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Mar. 31, 2013 Capitalized Internal Use Software [Member]	Mar. 31, 2012 Capitalized Internal Use Software [Member]	Mar. 31, 2013 Capitalized Internal Use Software, Except Significant System Conversions [Member]	Mar. 31, 2013 Maximum [Member] Capitalized Internal Use Software, Significant System Conversions [Member]	Mar. 31, 2013 Minimum [Member] Capitalized Internal Use Software, Significant System Conversions [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired during the year	$ 300,000
Finite-Lived Intangible Assets, Gross	60,600,000	61,900,000
Finite-Lived Intangible Assets, Net	25,100,000	26,300,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)	48,100,000	48,100,000
Finite-Lived Intangible Assets, Weighted-Average Useful Life			8 years				3 years	10 years	8 years
Acquired Finite-lived Intangible Asset, Residual Value			0		0
Amortization expense			1,400,000	1,600,000	30,500,000	19,700,000
Amortization expense for remainder 2013			4,500,000		82,200,000
Amortization expense for 2014			4,100,000		104,400,000
Amortization expense for 2015			3,200,000		99,600,000
Amortization expense for 2016			2,400,000		33,000,000
Amortization expense for 2017			2,200,000		27,300,000
Amortization expense for 2018			2,000,000		21,100,000
Amortization expense thereafter			6,700,000		43,600,000
Capitalized Computer Software, Gross	740,700,000	654,400,000
Capitalized Computer Software, Net	411,200,000	354,400,000
Capitalized Computer Software, Development Stage Costs	$ 138,100,000