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Commitments And Contingencies Unsecured Creditors Litigation (Details) - Pending Litigation - Unsecured Creditors Litigation
6 Months Ended
Jun. 30, 2016
USD ($)
Loss Contingencies [Line Items]  
Loss Contingency, Damages Sought, Value Per Unit in Excess of Benchmark $ 32.50
Loss Contingency, Damages Sought, Unit in Excess of Benchmark 67.50
Loss Contingency Accrual 0
Litigation, Damages Benchmark, Fourth LLP Agreement  
Loss Contingencies [Line Items]  
Cumulative Distribution Threshold 7,200,000,000
Minimum  
Loss Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss 0
Maximum  
Loss Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss $ 300,000,000