Employee Benefit Plans (Supplemental Retirement Programs) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Maximum deferral of base salary	50.00%
Maximum deferral of incentive compensation bonuses	100.00%
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member]
Expenses associated with retirement programs	$ 1.2	$ 1.7	$ 1.4
Other liabilities	57.9	69.7
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Net periodic benefit costs	7.6	8.4	9.8
Benefit obligation	44.2	63.9
Supplemental Life Plan [Member]
Additional death benefits, minimum range	0.4
Additional death benefits, maximum range	$ 2.0