Fair Value Unobservable Inputs (Details) - Mandatorily redeemable noncontrolling interests - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair value assets and liabilities measured on recurring basis unobservable input reconciliation
Balance at beginning of period, mandatorily redeemable noncontrolling interests	$ 32.8	$ 27.0
Level 3 additions	23.7	5.6
Level 3 reductions	(17.2)	(0.8)
Realized losses included in net income	5.3	1.0
Foreign currency translation	0.4	0.0
Balance at end of period, mandatorily redeemable noncontrolling interests	$ 45.0	$ 32.8