Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reconciliation of equity attributable to non-controlling interests
NCI, beginning of period	$ (11.5)	$ 2.1
Net income (loss) attributable to NCI, net of tax	(0.1)	(1.7)
Fair value of net assets and liabilities acquired and assigned to NCI	0.0	0.9
NCI, end of period	$ (11.6)	$ 1.3