Employee Benefit Plans (Other) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Defined Contribution Plan, Cost Recognized	$ 10.0	$ 5.7	$ 7.6
Common Stock, Shares, Outstanding	88,228,000	89,343,000
Savings Plan 401k [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Common Stock, Shares, Outstanding	820,101	866,559
Deferred compensation plan with individual percentage of total shares outstanding	0.90%	1.00%
Deferred Compensation, Share-based Payments [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation plan with individual percentage of salary deferral	80.00%
Plan assets at fair value at year end	$ 27.4	$ 30.3
Deferred compensation plan, unfunded liability	$ 32.2	$ 34.2