Principles of Consolidation (Reclassification Out of Accumulated Other Comprehensive Loss) (Details) (Accumulated Other Comprehensive Income (Loss) [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Member]
Reclassifications out of Accumulated Comprehensive loss [Line Items]
Reclassification of net pension actuarial losses to net loss, net of tax	$ 4.1	$ 2.0