Fair Value Unobservable Inputs (Details) - Mandatorily redeemable noncontrolling interests [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Balance at beginning of period	$ 45.0	$ 32.8
Level 3 additions	10.4	15.0
Level 3 reductions	(0.1)	(1.4)
Realized losses included in net income	1.8	0.4
Foreign currency translation	(0.2)	0.0
Balance at end of period	$ 56.9	$ 46.8