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Contingencies (Narrative) (Details) - Fiduciary Litigation
$ in Millions
1 Months Ended
Oct. 09, 2018
USD ($)
Aug. 30, 2016
class_action_complaint
Nov. 05, 2018
USD ($)
Loss Contingencies [Line Items]      
Number of plaintiffs | class_action_complaint   7  
Settlement payment amount $ 92.5    
Insurance reimbursement, amount $ 37.8    
Lawsuit for insurance reimbursement, amount     $ 10.0