Goodwill and Other Intangible Assets (Other Intangible Assets Narrative) (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Jun. 30, 2012 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Jun. 30, 2013 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Jun. 30, 2012 Finite-Lived Intangible Assets, Except Capitalized Internal-Use Software [Member]	Jun. 30, 2013 Capitalized Internal Use Software [Member]	Jun. 30, 2012 Capitalized Internal Use Software [Member]	Jun. 30, 2013 Capitalized Internal Use Software [Member]	Jun. 30, 2012 Capitalized Internal Use Software [Member]	Jun. 30, 2013 Capitalized Internal Use Software, Except Significant System Conversions [Member]	Jun. 30, 2013 Maximum [Member] Capitalized Internal Use Software, Significant System Conversions [Member]	Jun. 30, 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	$ 600,000
Finite-Lived Intangible Assets, Gross	57,200,000	61,900,000
Finite-Lived Intangible Assets, Net	23,800,000	26,300,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)	48,300,000	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		0		0
Amortization expense			1,400,000	1,900,000	2,900,000	3,700,000	34,600,000	21,700,000	65,100,000	41,400,000
Amortization expense for remainder 2013			2,900,000		2,900,000		62,800,000		62,800,000
Amortization expense for 2014			4,200,000		4,200,000		125,700,000		125,700,000
Amortization expense for 2015			3,400,000		3,400,000		131,200,000		131,200,000
Amortization expense for 2016			2,400,000		2,400,000		41,900,000		41,900,000
Amortization expense for 2017			2,200,000		2,200,000		30,900,000		30,900,000
Amortization expense for 2018			2,000,000		2,000,000		24,700,000		24,700,000
Amortization expense thereafter			6,700,000		6,700,000		50,100,000		50,100,000
Capitalized Computer Software, Gross	826,000,000	654,400,000
Capitalized Computer Software, Net	467,300,000	354,400,000
Capitalized Computer Software, Development Stage Costs	$ 139,400,000