Principles of Consolidation (Reclassification Out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Member]
Reclassifications out of Accumulated Comprehensive loss [Line Items]
Reclassification of net pension actuarial losses to net income, net of tax	$ 4.0	$ 1.9	$ 12.0	$ 5.8