Restructuring (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended
	Sep. 30, 2014 Employee Severence and Other Benefit Related Costs [Member]	Sep. 30, 2014 Employee Severence and Other Benefit Related Costs [Member]	Sep. 30, 2013 June 2013 Restructuring [Member]	Sep. 30, 2013 June 2013 Restructuring [Member]	Sep. 30, 2014 June 2013 Restructuring [Member]	Dec. 31, 2013 June 2013 Restructuring [Member]	Jun. 04, 2013 June 2013 Restructuring [Member]	Sep. 30, 2013 June 2013 Restructuring [Member] Employee Severence and Other Benefit Related Costs [Member]	Sep. 30, 2013 June 2013 Restructuring [Member] Employee Severence and Other Benefit Related Costs [Member]	Sep. 30, 2013 June 2013 Restructuring [Member] Contract Termination [Member]	Sep. 30, 2013 June 2013 Restructuring [Member] Asset Impairment Charges [Member]	Sep. 30, 2013 June 2013 Restructuring [Member] Other Restructuring Costs [Member]	Sep. 30, 2014 2013 and Early 2014 Restructuring [Member]	Sep. 30, 2013 2013 and Early 2014 Restructuring [Member]	Dec. 31, 2013 2013 and Early 2014 Restructuring [Member]	Sep. 30, 2013 2013 and Early 2014 Restructuring [Member] Lease Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected positions eliminated (percent)							15.00%
Restructuring reserve					$ 1.6	$ 12.3							$ 12.2		$ 16.1
Restructuring expenses	$ 2.4	$ 12.4	$ 9.9	$ 56.8				$ 2.2	$ 41.5	$ 7.8	$ 2.8	$ 12.5	$ 3.5	$ 9.0		$ 7.8