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Commitments And Contingencies Unsecured Creditors Litigation (Details) (Pending Litigation, Unsecured Creditors Litigation, USD $)
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3 Months Ended |
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Mar. 31, 2015
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| 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, Range of Possible Loss, Maximum | 300,000,000 |
| Loss Contingency Accrual | 0 |
| Litigation, Damages Benchmark, Fourth LLP Agreement | |
| Loss Contingencies [Line Items] | |
| Cumulative Distribution Threshold | $ 7,200,000,000 |