Operating Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases [Abstract]
Operating Leases Expense	$ 45.7	$ 86.8	$ 63.0
Operating Leases, Income Statement, Sublease Revenue	$ 7.6	$ 11.6	$ 11.1