Shareholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity, beginning balance			$ 1,112.0	$ 1,211.8
Net income	$ (24.3)	$ 55.8	22.4	52.1
Other comprehensive (loss), net of tax	25.5	(6.4)	(87.0)	(9.4)
Exercise of stock options			50.4
Recognition of stock-based compensation			14.2	3.8
Noncontrolling interests of acquired subsidiaries			4.3
Dividends declared to noncontrolling interests			(4.1)	(1.6)
Total stockholders’ equity, ending balance	1,112.2	1,256.7	1,112.2	1,256.7
Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity, beginning balance			1,044.7	1,142.9
Net income			20.0	49.5
Other comprehensive (loss), net of tax			(86.8)	(8.3)
Exercise of stock options			50.4
Recognition of stock-based compensation			14.2	3.8
Noncontrolling interests of acquired subsidiaries			0.0
Dividends declared to noncontrolling interests			0.0	0.0
Total stockholders’ equity, ending balance	1,042.5	1,187.9	1,042.5	1,187.9
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total stockholders’ equity, beginning balance			67.3	68.9
Net income			2.4	2.6
Other comprehensive (loss), net of tax			(0.2)	(1.1)
Exercise of stock options			0.0
Recognition of stock-based compensation			0.0	0.0
Noncontrolling interests of acquired subsidiaries			4.3
Dividends declared to noncontrolling interests			(4.1)	(1.6)
Total stockholders’ equity, ending balance	$ 69.7	$ 68.8	$ 69.7	$ 68.8