Fair Value Unobservable Inputs (Details) - Mandatorily redeemable noncontrolling interests [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Balance at beginning of period	$ 57.8	$ 44.9	$ 45.0	$ 32.8
Level 3 additions	5.1	1.9	16.3	23.7
Level 3 reductions	(10.6)	(3.9)	(11.8)	(15.3)
Realized losses included in net income	0.9	1.4	4.9	2.3
Foreign currency translation	0.0	(0.2)	(1.2)	0.6
Balance at end of period	$ 53.2	$ 44.1	$ 53.2	$ 44.1