Affiliate Equity - Summary of Affiliate Equity-Recognized and Unrecognized Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Affiliate Equity [Line Items]
Non-controlling interests	$ 4.8	$ 37.9	$ 8.7	$ 43.3
Affiliate equity expense	6.3	39.6	11.5	47.4
Non-controlling Interests
Affiliate Equity [Line Items]
Affiliate equity expense			$ 8.7	$ 43.3
Unrecognized Affiliate Equity Expense [Abstract]
Remaining Life (in years)			6 years	5 years
Non-Controlling Interest			$ 72.7	$ 51.9
Affiliated Entity
Affiliate Equity [Line Items]
Controlling interest	2.4	2.8	4.5	6.7
Tax benefit	(0.9)	(1.1)	(1.7)	(2.6)
Controlling interest, net	$ 1.5	$ 1.7	2.8	4.1
Unrecognized Affiliate Equity Expense [Abstract]
Controlling Interest			$ 30.5	$ 22.4
Remaining Life (in years)			4 years	3 years