Principles of Consolidation (Reclassification Out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 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	$ 3.9	$ 1.9	$ 8.0	$ 3.9