Redeemable Noncontrolling Interests - Table 2 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Redeemable Noncontrolling Interest [Line Items]
Net income attributable to nonredeemable noncontrolling interest	$ 14.8	$ 13.6
Net income attributable to redeemable noncontrolling interest	3.9	2.9
Net income attributable to noncontrolling interests	$ 18.7	$ 16.5