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Investments In And Advances To Affiliates (Narrative) (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) facility entity | Dec. 31, 2017 entity
Schedule Of Equity Method Investments [Line Items] |  |
Amount of credit facility provided to unconsolidated affiliates | $ 105 |
Number of unconsolidated affiliates provided with credit facilities by the entity | entity | 4 |
Number of credit facilities with outstanding balance | facility | 2 |
Number of credit facilities with no outstanding balance | facility | 2 |
Outstanding balance of credit facilities | $ 34 |
Wilmar International Limited [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Equity Method Investment, Ownership Percentage | 24.90% | 24.90%
Carrying value of direct investments | $ 3,900 |
Market value of direct investments | $ 3,600 |
Minimum [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Credit facility, basis spread on floating interest rate | 0.00% |
Maximum [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Credit facility, basis spread on floating interest rate | 5.74% |
Equity Method Investments [Member] |  |
Schedule Of Equity Method Investments [Line Items] |  |
Number of unconsolidated affiliates | entity | 56 | 56
Undistributed earnings of unconsolidated affiliates | $ 2,400 |

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