Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basis of Presentation:
Noncontrolling interest amounts in income, net of tax	$ 2.4	$ 2.4	$ 3.5	$ 1.9