Summary of Significant Accounting Policies (Details Numeric) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Allowance for doubtful accounts	$ 38.3	$ 46.8
Provision for doubtful accounts	50.1	44.9	24.3
Goodwill impairment loss	0	0	0
Amortization expense	198.6	184.4	131.6
Estimated future aggregate amortization expense, 2014	210.0
Estimated future aggregate amortization expense, 2015	151.0
Estimated future aggregate amortization expense, 2016	134.0
Estimated future aggregate amortization expense, 2017	102.5
Estimated future aggregate amortization expense, 2018	54.0
Estimated future aggregate amortization expense, thereafter	182.3
Impairment of intangible assets excluding goodwill		0	0
Advertising costs	$ 165.1	$ 177.5	$ 174.8
Minimum [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption frequency	1 month
Redemption notice period	3 days
Minimum [Member] | Hedge funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption frequency	1 month
Redemption notice period	3 days
Maximum [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption frequency	3 months
Redemption notice period	60 days
Maximum [Member] | Hedge funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption frequency	3 months
Redemption notice period	60 days