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Affiliate Equity (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Affiliate Equity [Abstract]
Compensation expenses related to affiliate equity noncontrolling interests	$ 7.9	$ 2.2	$ 35.1	$ 11.3
Affiliate equity compensation cost not yet recognized	76.1		76.1		68.2
Affiliate equity compensation cost not yet recognized attributable to noncontrolling interest	$ 43.2		$ 43.2		$ 32.1
Period for recognition			4 years