Litigation And Other Contingencies (Schedule Of Guarantees) (Details) $ in Millions |
Dec. 31, 2015
USD ($)
|
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|---|---|---|---|---|
| Loss Contingencies [Line Items] | ||||
| Guarantees | $ 7,225 | |||
| Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 2,637 | [1] | ||
| Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 4,588 | |||
| Debt-Related Guarantees [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 133 | |||
| Debt-Related Guarantees [Member] | Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 98 | [1] | ||
| Debt-Related Guarantees [Member] | Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 35 | |||
| Other Guarantees [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 7,092 | |||
| Other Guarantees [Member] | Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 2,539 | [1] | ||
| Other Guarantees [Member] | Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | $ 4,553 | |||
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