Fair Value Level 3 Inputs (Details) - Mandatorily redeemable noncontrolling interests - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Level 3 Roll Forward
Balance at beginning of period	$ 46.8	$ 28.9	$ 32.8	$ 27.0
Level 3 additions	6.8	0.5	21.8	2.5
Level 3 reductions	(10.0)	(0.6)	(11.4)	(0.6)
Realized losses/(gains) included in net income	0.5	(0.1)	0.9	(0.2)
Foreign currency translation	0.8	0.0	0.8	0.0
Balance at end of period	$ 44.9	$ 28.7	$ 44.9	$ 28.7