Fair Value Level 3 Inputs (Details) - Mandatorily redeemable noncontrolling interests - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Level 3 Roll Forward
Balance at beginning of period	$ 44.9	$ 28.7	$ 32.8	$ 27.0
Level 3 additions	1.9	0.0	23.7	2.5
Level 3 reductions	(3.9)	0.0	(15.3)	(0.6)
Realized losses/(gains) included in net income	1.4	0.1	2.3	(0.1)
Foreign currency translation	(0.2)	0.0	0.6	0.0
Balance at end of period	$ 44.1	$ 28.8	$ 44.1	$ 28.8